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HomeMy WebLinkAboutMINUTES - 12081992 - H.11A 0 r t 5 TO: BOARD OF SUPERVISORS Vesting Tentative Map for Subdivisions 7575 and 7578 FROM: Harvey E. Bragdon Director of Community Development DATE: December 8, 1992 SUBJECT: Wiedemann Ranch Residential Community Project: Approval of Rezoning #2947, Preliminary Development Plan #3005-91, Tentative Cancellation of Williamson Act Contracts #5-76 and #16-70, Certification of Environmental Documentation, and Adoption of Findings. SPECIFIC REQUEST(S) OR RECOMMENDATION(S) & BACKGROUND AND JUSTIFICATION RECOMMENDATIONS 1. Reaffirm certification of the environmental documentation prepared for this project (Westside Specific Plan Final Environmental Impact Report and Wiedemann Ranch Residential Community Project Final Supplemental Environmental Impact. Report) as being adequate. The County is the lead agency for the project. Accept and certify as adequate the addendum to the environmental documentation attached as Exhibit A. 2. Approve Rezoning #2947-RZ, attached as Exhibit B, as recommended by the San Ramon Valley Regional Planning Commission to rezone a portion of the 1,143 acres of the project site from Agricultural Preserve (A-4) and General Agricultural (A-2) to Planned Unit District (P-1) . The P-1 area is comprised of 482 acres. 3. Approve Preliminary Development Plan #3005-91 dated November 13, 1992, attached as Exhibit C, for 371 single family dwelling units including three private open space lots, common areas and other nondevelopment areas. 4. Approve Vesting Tentative Map for subdivisions #7575 and #7578, dated November 13, 1992, (also Exhibit C) providing respectively for subdivision of 1,052 acres into 337 lots, common open space and other nondevelopment areas, and 91 acres into 34 ots, common open space and other nondevelopment areas. CONTINUED ON ATTACHMENT: X YES SIGNATU RECOMMENDATION OF COUNTY ADMINISTRATOR RECOMMENDATION OF tOARD COMMITTEE APPROVE OTHER SIGNATURE(S) : ACTION OF BOARD ON 12/8/92 APPROVED AS RECOMMENDED X OTHER X See Addendum for Board action VOTE OF SUPERVISORS I HEREBY CERTIFY THAT THIS IS A TRUE AND CORRECT COPY OF AN X UNANIMOUS (ABSENT II ) ACTION TAKEN AND ENTERED ON THE AYES: NOES: MINUTES OF THE BOARD OF SUPERVISORS ABSENT: ABSTAIN: ON THE DATE SHOWN. Contact: Robert Drake - 646-2091 Orig: Community Development Department ATTESTED: December 8, 1992 cc: Public Works Department PHIL BATCHELOR, CLERK OF Local Agency Formation Commission THE BOARD OF SUPERVISORS East Bay Municipal Utility District An COUNT DMINISTRATOR East Bay Regional Park District City of San Ramon BY ,DEPUTY HCV Pacific Partners Jeff & Nancy Wiedemann Susan Christensen ATTACHMENT TO BOARD ORDER DATED DECEMBER 8, 1992 5. Adopt the Conditions of Approval for Wiedemann Ranch Residential Community Preliminary Development Plan #3005-91 and Vesting Tentative Maps for subdivisions #7575 and 7578 dated November 13, 1992, attached as Exhibit D. Adopt as part of these conditions, the Tentative Regional and Project Trails, Agricultural Lot, Open Space and Scenic Easement Map dated November 13, 1992, and revised November 17, 1992, attached as Exhibit E. 6. Adopt the Findings for Wiedemann Ranch Residential Community Rezoning #2947-RZ, Preliminary Development Plan #3005-91, and Vesting Tentative Map for subdivisions #7575 and 7578, attached as Exhibit F. 7. Adopt the Wiedemann Ranch Residential Community Mitigation Monitoring Program, attached .as Exhibit G. 8. Approve with conditions the tentative cancellations of the Williamson Act contracts dated February 10, 1976 (Agricultural Preserve #5-76) and January 27, 1970 (Agricultural Preserve #16-70) , as to the developable portion of the project properties only. Adopt the Findings and Determinations for Tentative Cancellations of Williamson Act Contracts Agricultural Preserve #5-76 and Agricultural Preserve #16-70, attached as Exhibit H. 9. Introduced the P-1 zoning ordinance, Exhibit B, giving effect to Rezoning #2947-RZ, waive reading and set forth the date for adoption of same as January 19, 1993. (In order to provide a more accurate description of the P-1 zoning than as set forth in the Zoning Map, included as part of Exhibit B but not in the Zoning Ordinance itself is a P-1 zoning description and approved tentative subdivision map with the P-1 boundary depicted on it) . FISCAL IMPACT None. BACKGROUND/REASONS FOR RECOMMENDATION On October 27, 1992, the Board held a noticed public hearing on the Wiedemann Ranch Residential Community Project ("project") , comprised of the rezoning, preliminary development plan and vesting tentative subdivision map with conditions, and on the request for tentative cancellation of the two Williamson Act contracts on the project site. The SRVRPC by unanimous vote recommended: 1) certification of the environmental documentation for the project and Williamson Act contract cancellations; and 2) approval of the project with Planning Commission recommended conditions of approval. After receiving testimony from all members of the public and representatives of interested agencies who wished to speak, the Board provided comment and direction on the project. Such direction included: 1) a request that the applicant and property owners continue discussions with East Bay Regional Park District officials in an attempt to reach mutual agreement on the project configuration and conditions; 2) continued discussions between the Public Works Department and the applicant on public works-related project conditions; 3) consideration of other modifications to the project and conditions suggested by or in response to comments by members of the Board. By unanimous vote, the Board certified the environmental documentation as adequate and then declared its intent to approve both the project as generally presented and the tentative cancellation of the Williamson Act contracts, kept the public hearing open and continued it to November 17, 1992 to address the matters raised at this first hearing, to provide an opportunity for any additional testimony, and to make changes to the project and conditions that were recommended by the SRVRPC. On November 17, 1992, the Board held its second public hearing on the project and tentative cancellations of the Williamson Act contracts. The applicant and its representatives reviewed with the Board changes in the project as provided in the revised Wiedemann Ranch Residential Community Preliminary Development Plan and Vesting Tentative Subdivision Map dated November 13, 1992. The new map included the revisions to the road standards, configurations and widths recommended by the Public Works Department to address the project's hillside conditions in a safe yet sensitive manner consistent with the underlying intent of the SRVRPC. The revised map also included a relocation of seven lots from the lower portion of "H" Court to address concerns expressed by the EBRPD regarding their potential visual introduction into the Bishop Ranch Open Space. The revised map also included a relocation of two lots from the area of the expanded park I:\vol2\clicnt\21857\boma.mmo -2- 1\ � I facilities as recommended by the San Ramon Valley Regional Planning Commission. These seven lots and one additional lot where located elsewhere in the project. The one additional lot was included in the revised map in response to the suggestion by Chair McPeak to provide an incentive for the developer to make a voluntary contribution to the County-sponsored Homeless Trust Fund. These nine lots are relocated along already proposed roadways within the project consistent with the hillside and design standards generally applied to the project and such that no new environmental impacts have been created. The graphics provided by the applicant demonstrate that any visual impacts from homes on these new lots will be mitigated consistent with the measures applied to homes on adjoining lots. Nearby lots are sufficiently wide and large and the project development area is large enough to relocate these lots without expanding the development area and while still maintaining the integrity of the remaining open space. Relocation of these lots as proposed will not adversely affect the hillside design integrity or visual sensitivity of this project. A revised Tentative Regional and Project Trails, Agricultural Lot, Open Space and Scenic Easement Map dated November 13, 1992 and revised November 17, 1992 (Agricultural Lots Map) was proposed and presented. That map, along with revised EBRPD-related conditions of approval, are acceptable to the EBRPD and the applicant. Revised public works-related conditions acceptable to the Public Works Department and the applicant were prepared and presented that comply with the County's growth management policies and fully mitigate traffic impacts from the project, including its share of cumulative impacts. With respect to the two off-site improvements which will not receive direct "fair share" funding from the applicant, that is offset by extra contributions to the other off-site improvements. Other cumulative development projects that impact those two locations will be required to fully fund those two remaining off-site improvements. Construction of improvements at these two remaining locations are not required at this time under the County's growth management standards. Revised miscellaneous conditions were proposed and presented to address comments made by members of the Board, including conditions related to trail construction, energy efficiency, and the timing for payment of development agreement related fees. To address concerns expressed by Director Flashman from the East Bay Municipal Utilities District (EBMUD) , an Advisory Note was prepared and presented advising that the Board did not consider the approval of the project to be a precedent for other projects that may require water from EBMUD. That would include the Dougherty Valley. The Board also expressed an interest in establishing a dialogue with EBMUD officials to address the inter-relationship between County land use policies and decisions and EBMUD water supply policies and decisions and directed staff to arrange for the necessary meetings. From the County's perspective, one purpose of these discussions is to have EBMUD develop a Water Management Supply Program that realistically takes into consideration the County's Urban Limit Line, unlike the current draft WMSP that has assumed in calculating expected water use that new EBMUD water users will be limited to those located within the Ultimate Service Boundary adopted by EBMUD (USB) . The USB has been established unilaterally by EBMUD without taking into account county and city general plan policies and LAFCO spheres of influence. The Board did not consider it necessary to delay approval of this project pending the outcome of .. the discussions with EBMUD or completion of and/or implementation of the EBMUD Water Management Supply Program, because this project will have a negligible effect on the District's water supplies, either individually or as to its part of any cumulative new water use in the District. There is no need to assure water use supplies for potential water users outside the USB as part of this project approval. Substantial projects outside the USB may not move forward unless adequate new water supplies are available. That is required by our General Plan for projects in the County. There is nothing to suggest that cities and Alameda County would require any less for projects in their respective jurisdiction that are anticipated to be served by EBMUD. EBMUD's cumulative impact approach assumes to the contrary and is therefore flawed in the professional judgment of the Community Development Department. This project should not be delayed to complete for a sophisticated and complex cumulative impact analysis in this Project EIR of EBMUD's future water needs and supplies and potential annexations that have yet to be requested. It has taken several years and substantial expenditure for EBMUD to do just that in the WMSP Study. Completion of that study is a least a year away. No substantial new projects are contemplated inside the USB. The Board declared its intent to approve the project as revised with the conditions of approval as revised and presented, directed staff to prepare findings and any necessary related documentation in support of the project approval, and continued 'the public hearing to December 8, 1992. The Board held the public hearing open to provide the public the opportunity for comment on the findings and other documentation associated with approval of the project. The project approval documents have previously been available to the public at the Clerk of the Board or the Community Development Department. I:\vol'\cl icnt\2]857\boma.mmo -3- The conditions of approval attached as Exhibit D reflect the changes approved by the Board at the last hearing. The project and conditions of approval as presented are somewhat different from the recommendation of the San Ramon Valley Regional Planning Commission. The changes are not such as to require referral back to the SRVRPC under Government Code Section 65857. Changes to the project and the concerns they represent were presented to and considered by the Planning Commissioners or are otherwise insubstantial. For example, at the Planning Commission hearings: 1) requests were made to modify the project design, including "H" Court and eliminate or relocate units elsewhere in the project; 2) several variations to road widths and grades were considered including variations comparable to the adopted ones; and 3) different open space and trail approaches were presented. The addition of one more unit within the same development area is an insignificant change. The revised map incorporated many of the changes made to the project prior to or as part of the SRVRPC recommendations. Other changes in the conditions suggested by members of the Board, (for example, energy efficiency, trail construction by local job opportunity organization, and the homeless trust fund contribution) represent insignificant changes in the context of the overall approval. For example, the additional twenty acres to be rezoned P-1 are the result of the gift of Parcel "I" to the EBRPD and do not reflect an increase in development area. The Findings for the Wiedemann Ranch Residential Community Project, attached as Exhibit F include CEQA, zoning and subdivision findings. No unavoidable significant environmental impacts remain, but, to the extent that it may be required under the law, a Statement of Overriding Considerations is included. The evidence to support the overriding considerations is included in the Statement itself or references therein are made to testimony and evidence in the administrative record, including the County's Housing Element. A short EIR addendum has been prepared to include the changes in the project as a result of the Board hearings as part of the environmental documentation for the project. The addendum , attached as Exhibit A, also addresses some of the comments raised in letters submitted to the Board on or shortly before the October 27th hearings, and it formally incorporates, as part of SFEIR alternative analysis, the minimization alternative included in the Staff Report to the SRVRPC. The avoidance alternative is very similar to the RCOD alternative in the FSEIR. Substantial opportunity to comment on the minimization alternative was available, both in writing and by way of testimony at public hearings before the Planning Commission and the Board. Certification of the addendum is consistent with the requirements of CEQA Guidelines Section 15164. Staff recommends that at this time the Board certify it as an adequate addendum and reaffirm and certify as adequate the environment review for the project. The Board declared its intent earlier to approve the tentative cancellations of the two Williamson Act contracts. Findings in support of those cancellations are attached as Exhibit H. The findings are based on the analysis in the environmental documents, correspondence from the applicant, testimony before the Board, the Williamson Act exhibit presented to the Board on October 27, 1992, and the land use limitations in the area as provided for in the Alameda County General Plan and zoning ordinances, the West Dublin Specific Plan and related documents, and the Contra Costa County General Plan and zoning ordinances, which planning documents are included as part of the administrative record. The Wiedemann Ranch Residential Community Mitigation Monitoring and Reporting Program has been prepared for consideration by the Board. Staff recommends that the Board adopt it at this time as in compliance with CEQA, specifically Public Resource Code Section 21081.6. Following adoption, be advised that staff may want to review the program further and may suggest changes to the program, findings and related project approval documentation for subsequent consideration by the Board. The project approval documentation is complete such that the Board may make its decision at this time to approve the Wiedemann Ranch Residential Community project (rezoning, preliminary development plan and vesting tentative subdivision map) with its conditions of approval as revised and the tentative cancellations of the two Williamson Act contracts. 1:\vo I2\c l i c n t\21857\b o m a.m m o —4— ADDENDUM TO ITEM H. 11 December 8, 1992 On November 17, 1992, the Board of Supervisors continued to this date the hearing on the recommendation of the San Ramon Valley Regional Planning Commission on the certification of the Final Supplemental Environmental Impact Report for the Wiedemann Ranch Residential Community project; a request of HCV Pacific Partners (applicant) and Jeff and Nancy Wiedemann and Susan Christensen, et al (owners) to rezone 1, 143 acres of land from Agricultural Preserve (A-4) and General Agricultural (A-2) to Planned Unit District (P-1) (2947-RZ) ; a request for preliminary development plan approval (DP 3005-91) for 370 single family dwelling units/lots including three private open space lots and common area; a request for vesting tentative map approval (Subdivision 7575) to subdivide 1, 052 acres into 336 lots including three private open space parcels; and a request for approval of Petitions to cancel the restrictions of two Agricultural Preserve contracts (AP#16-70 and AP#5-76) affecting approximately 1, 128 acres of land, San Ramon area. The following persons presented testimony: Stuart Flashman, 5626 Oceanview Drive, Oakland, on behalf of East Bay Municipal Utility District (EBMUD) , commented on the issue of water supply and water supply management program. Supervisor McPeak discussed the issue of annexation to the EBMUD Service area with Mr. Flashman. Mark Armstrong, Gagen, McCoy, McMahon and Armstrong, representing Jeff and nancy Wiedemann and HCV Pacific Partners, commented that he would be willing to work with EBMUD and to request the Board not to file the Notice of Determination and allow the statute of limitations to extend out for a longer period of time . Martin Vitz, East Bay Regional Park District . The public hearing was closed. Supervisor Schroder commented on a letter from EBMUD responding to the request to discuss the water issue and he moved approval of the staff recommendations . Supervisor Powers seconded the motion. Supervisor McPeak clarified that the motion included direction to staff not to file the Notice of Determination and that the Board declares its intent not to take the final discretionary action on the annexation proceedings before LAFCO until the Water Committee has exhausted the discussions with East Bay Municipal Utility District with this particular project . The maker and seconder of the motion concurred. IT IS BY THE BOARD ORDERED that the staff recommendations are APPROVED; Community Development Department staff is DIRECTED not to file a Notice of Determination; and the Board DECLARES ITS INTENT not to take final discretionary action on the annexation proceedings before LAFCO until the Water Committee has finished discussions with the East Bay Municipal Utility District on this project . R- M, 1lq EXHIBIT A ADDENDUM TO THE SUPPLEMENTAL ENVIRONMENTAL IMPACT REPORT FOR THE WIEDEMANN RANCH RESIDENTIAL RANCH COMMUNITY PROJECT This Addendum amends the Final Supplemental Environmental Impact Report for Wiedemann Ranch Residential Community Project (SEIR) to include as part of the project description the safety and other improvements to Norris Canyon Road required by Conditions of Approval 3 .G. , 49.A. and 49.B. More extensive improvements were contemplated in the Westside Specific Plan and its EIR. Also included in the project description are the sound wall improvements in Condition 41 and the signal at Norris Canyon Road and Bollinger Canyon Road in Condition 49 .C. Also included in the project description are the Vesting Tentative Subdivision Map and Preliminary Development Plan revised November 13 , 1992 , which reflect changes to the tentative map and final development plan as originally submitted. Also included in the project description is the Regional and' Project Trail, Agricultural Lot, Open Space and Scenic Easement Map dated November 131 1992 and revised November 17, 1992 , which reflect changes to the trail and open space program as endorsed by the East Bay Regional Park District. The changes to these maps reflect efforts to further mitigate project impacts and to provide for more sensitive and well-planned hillside design. There are no secondary environmental impacts associated with these changes or with the revisions to the Conditions of Approval of the project. The changes in the project and Conditions of Approval do not raise any important new issues about significant effects on the environment. These changes in the project and the Conditions of Approval involve changes to the SEIR that represent only minor technical changes or additions to it. These changes in the project description are consistent with the requirements for an addendum under CEQA Guideline Section 15164 . This Addendum incorporates by reference as though fully set forth herein Sections VIII and IX of the Wiedemann Ranch Residential Community Staff Report to the San Ramon Valley Regional Planning Commission by the Contra Costa County Community Development Department dated September 16, 1992 . Those sections describe and discuss respectively an Avoidance Alternative and a Minimization Alternative to the Wiedemann Ranch Residential Community Project. The Avoidance Alternative is substantially the same as the RCOD Alternative at page 4-15 of the SEIR. The Minimization Alternative is a redesign of the project intended primarily to eliminate or relocate residential lots that could be viewed from different locations in the San Ramon Valley . community to the east and to travelers along a portion of Norris Canyon Road to the north. The Minimization Alternative is a map representation of the suggested mitigation measures in the SEIR to redesign the project if the further elimination of homes from views from the several vantage points identified in the SEIR was deemed by the decision-makers to be desirable and/or to be required in order to comply with the hillside protection and related policies in the General Plan. The Minimization Alternative is based on an elimination of units that are collectively identified as visible in the several viewshed computer projections in the SEIR. The Minimization Alternative focuses on development in the relatively invisible bowl behind the cross valley-ridge. It does not provide for a balanced grading operation on the project site, because it eliminates any cuts in the area of the cross valley-ridge which are required for 1:\vol2\client\21 f357\add-se i r.124 1 1 fill in the bowl area in order to develop it and still balance the cut and fill on site. The Minimization Alternative also does not address the requirements of Public Resource Code § 21085 and CEQA Guideline 15041 that other feasible, specific mitigation measures or alternatives be used if available in lieu of an alternative or mitigation measure that reduces the proposed number of housing units. Visual and other impacts can be mitigated to a less than significant level through the project as represented in the SEIR Mitigation Alternative and in the Vesting Tentative Map and Preliminary Development Plan dated November 13 , 1992 . The addition of these two alternatives in the SEIR by way of this Addendum do not raise important new issues about the significant effects of the project on the environment. All potential significant effects of the project had been evaluated in the previous environmental documents. The addition of these two alternatives represent only minor technical changes or additions to the SEIR. There has been a full opportunity to review the Avoidance Alternative and the Minimization Alternative throughout the public hearing process before the San Ramon Valley Regional Planning Commission and the Board of Supervisors. The underlying issues that led to these alternatives were fully addressed during the SEIR process. There is no need to circulate the SEIR again with these two additional alternatives formerly included in it. I:\vo12\client\21857\add-seir.124 2 EXHIBIT B ORDINANCE NO. 92- (P-1 Zoning in San Ramon Area: 2947-RZ) The Contra Costa County Board of Supervisors ordains as follows. SECTION I. The 1978 Zoning Map of Contra Costa County, updated by Ordinance No. 78-93 and included as part of the County Ordinance Code at section 84-2 . 002 , is hereby amended at Pages X-16, Z-13m and Z-16m to rezone areas on the maps from A-2 and A-4 Zoning Districts to the P-1 Zoning District, as more specifically set forth on the Findings Maps approved by the Board of Supervisors under Rezoning No. 2947-RZ on December 8 , 1992 and fully incorporated herein by reference. The 1978 Zoning Map of Contra Costa County shall be amended consistent with the provisions of section 84-2 . 003 . SECTION II. EFFECTIVE DATE. This Ordinance becomes effective thirty (30) days after passage, and within fifteen (15) days after passage shall be published with the names of the Supervisors voting for and against it in the San Ramon Valley Contra Costa Times, a newspaper published in this County. PASSED on by the following vote: AYES: NOES: ABSENT: ABSTAIN: ATTEST: PHIL BATCHELOR, Clerk of the Board and County Administrator By: Deputy Board Chair [SEAL] I:\vol2\clicnt\21857\Exhibit.B 1 EXHIBIT B P-1 REZONING MAP OF WIEDEMANN RANCZ RER DENTIAL COMMUNITY PROJECT FOR REZONING NO• 2* Cross-hatch reflects deletions to the P-1 area as recommended by the SRVRPC' made by the Board of Supervisors. **Double cross-hatch reflects deletion to the P-1 area as recommended by the SRVRPC made by the Board of Supervisors- d Zoning Maps shall be modified to The County Base Map Book an reflect this change to P-1 from A=2 and A-4. Findings Map � � r 111 A U�00/tN 0 RRIS GA P-1 A-4 n 10 0to > . .... . ...... . Area Rezone From A-4- To—?--t i, a1U�4c CI Chair of the San Ramon Valley Planning Commission, Contra costa County, State of California, do hereby certify that this a true and correct-copy of _P ar-es "r__ Coll rIJ121's indicating thereon the decision of the San Ramon valley Regional Planning Commission in the matter of Chair of the San �amon Valley Regional Planning Commission, State of California ATTEST: onV Secretar ar ie San al alley Regional SHEET 1 OF 2 SHEETS Planning Commission, Stateof California EXHI�IT B Findings Map 1 A'4 1 2 A i . 1 zo A•4 \ -�I A- 7- Rezone Rezone From A-�� --To 2- 1 Area Co—t- c y ' \-\,Chair of the San Ramon Valley Planning Commissi >ontra Costa County, State of Califomia, do hereby certify that this a true and correct copy of indicating thereon the decision of the San Ramon Valley Regional Planning Commission in the matter of HV G Chair of the San t1amon Valley Regional Planning Commission, State of California ATTEST: Secre ar the 'Ramon Valley Regional SHEET 2 OF 2 SHEETS Planning Commis n, State of California EXHIBIT B EXHIBIT "B" P-1 ZONNG DESCRIPTION ALL OF PARCEL C, AS SHOWN ON MS 108-86, FILED MAY 5, 1988, IN BOOK 133 OF PARCEL MAPS AT PAGE 8, CONTRA COSTA COUNTY RECORDS; ALL OF PARCELS A, B AND C AND PORTION OF PARCEL D AS SHOWN ON MS 135-74, FILED DECEMBER 5, 1975 IN BOOK 41 OF. PARCEL MAPS AT PAGE 21 AT SAID COUNTY RECORDS; PORTION OF LOTS 1, 2, AND 3; THE WEST 1/2 OF THE SOUTHWEST 1/4; AND THE SOUTHEAST 1/4 OF THE SOUTHWEST 1/4, ALL IN SECTION 21; ALL SECTIONS ARE IN TOWNSHIP 2, RANGE 1 WEST, MT. DIABLO BASE AND MERIDIAN. BEGINNING AT THE MOST NORTHEASTERN CORNER OF SAID PARCEL C (133 PM 8); THENCE FROM SAID POINT OF BEGINNING ALONG THE EASTERN LINE OF SAID PARCEL C (133 PM 8) SOUTH 000 31' 00" WEST 2188.36 FEET TO TIIE SOUTHEASTERN CORNER OF SAID PARCEL C (133 PM 8) SAID CORNER ALSO BEING ON THE NORTHERN LINE OF SAID PARCEL D (41 PM 21); THENCE ALONG SAID NORTHERN LINE, NORTH 810 22' 40" EAST, 2650 FEET; THENCE LEAVING SAID NORTHERN LINE, SOUTH 680 16' 37" EAST, 418.88 FEET; THENCE SOUTH. 320 16' 09" EAST, 248.28 FEET; THENCE SOUTH 440 41' 01" EAST, 407.30 FEET; THENCE SOUTH 03° 23' 42" WEST, 1288.44 FEET; THENCE SOUTH 230 29' 40" EAST, 105.71 FEET; THENCE SOUTH 240 34' 32" WEST, 321.00 FEET; THENCE SOUTH 820 50' 38" WEST, 333.80 FEET; THENCE SOUTH 010 08' 37" EAST, 78.28 FEET; THENCE SOUTH 340 58' 30" WEST, 371.32 FEET; THENCE SOUTH 47° 56' 43" WEST, 506.25 FEET; THENCE SOUTH 470 53' 27" EAST, 457.27 FEET; THENCE SOUTH 320 51' 04" EAST, 314.96 FEET; THENCE SOUTH 800 53' 05" EAST, 693.21 FEET; THENCE SOUTH 530 52' 17" EAST, 161.49 FEET; THENCE SOUTH 330 24' 19" EAST, 266.37 FEET; THENCE SOUTH 030 04' 37" WEST, 348.26 FEET; THENCE SOUTH 43° 50' 21" WEST, 493.58 FEET; THENCE SOUTH 730 38' 18" WEST, 321.80 FEET; THENCE SOUTH 880 40' 24" WEST, 296.16 FEET; THENCE NORTH 76° 19' 48" WEST, 706.65 FEET; THENCE NORTH 630 59' 42" WEST, 1957.55 FEET; THENCE NORTH 460 53' 15" WEST, 463.58 FEET; THENCE NORTH 090 34' 01" EAST, 1360.60 FEET; THENCE NORTH 510 56' 00" EAST, 142.71 FEET; THENCE SOUTH 370 29' 55" EAST, 95.56 FEET; THENCE NORTH 530 39' 27" EAST, 149.13 FEET; THENCE NORTH 440 15' 33" WEST, 617.23 FEET; THENCE SOUTH 250 00' 59" WEST, 942.01 FEET; THENCE SOUTH 740 52' 00" WEST, 515.12 FEET; THENCE NORTH 70° 02' 19" WEST, 1560.05 FEET; THENCE NORTH 100 09' 32" EAST, 828.90 FEET; THENCE NORTH 310 21' 46" EAST, 768.30 FEET TO SAID NORTHERN LINE OF SAID PARCEL D (41 PM 21) SAID POINT ALSO BEING THE MOST SOUTHWESTERN CORNER OF SAID PARCEL C (133 PM 8); THENCE ALONG THE WESTERN LINE OF SAID PARCEL C (133 PM 8) NORTH 110 53' 58" WEST 1668.00 FEET TO THE NORTHWESTERN CORNER OF SAID PARCEL C (133 PM 8); SAID CORNER ALSO BEING ON THE SOUTH LINE OF THE NORRIS CANYON ROAD RIGHT-OF-WAY; THENCE ALONG SAID SOUTH LINE, EASTERLY TO THE WESTERN EXTENSION OF THE NORTH LINE OF SAID PARCEL C (133 PM 8); THENCE ALONG SAID NORTH LINE SOUTH 890 27' 34" EAST, 860.12 FEET TO THE POINT OF BEGINNING. 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I I =Flu�. p _ \\ \ --"/I \.� - I///�•)////� ""'%�\\\\ \\\. i '�\ .,' .�. :�. r ��\'C!ti' - \1�\\IS/rj�17i:!•'di=v.J. �' Nk r - - _ NN \ -. . `, J �>•�,% � :•�_ •!- •/�I III`,.\;,;:--__ `a�� ;}—\�((.=,� "1• r`� ;ME _ �1 \' •It's :;:�:: '.l,!�\'�\ . ..�.; i',i�\;�:;-_ �J`\�`�-• ..::.-. ;�1 \��\:C��.\`��� /i\, j :,�., ��=: :� I`.; .1)\/�_ \, ,•:;-• �___ 1 fit Ali FCR Nx Nx 01 _ ` ' Fy ''.\�\\(\ I ,/ `\•''.• - ? 1��\\\I\;\\i \\ '\ �S Ii a EXHIBIT D CONDITIONS OF APPROVAL FOR WIEDEMANN RANCH RESIDENTIAL COMMUNITY, PRELIMINARY DEVELOPMENT PLAN #3005-91 AND VESTING TENTATIVE SUBDIVISION MAPS #7575 & #7578 DATED NOVEMBER 13, 1992 General 1. Exhibits. Development shall be based on the following submitted exhibits as modified by the conditions below: A. Vesting Tentative Map for Subdivisions #7575 and #7578 dated received November 13 , 1992 . This is also the Preliminary Development Plan. B. February 8 , 1991 Harlan Tait Associates Geotechnical Feasibility Investigation. C. March 30, 1992 Harlan Tait Associates Landslide Repair Plans. D. August 27, 1991 Sugnet & Associates Biotic Resource Assessment and Habitat Mitigation Plan. E. July 30, 1992 Harlan Tait Associates Geotechnical Report for Subdivisions 7575 and 7578 . F. Project Hillside Protection and Development Guidelines dated September, 1992 . G. January 8 , 1992 letter from HCV Pacific Partners to San Ramon Valley Fire Protection District. H. Regional and Project Trails Agricultural Lots Open Space and Scenic Easement May dated November 17, 1992 . 2 . Number of Lots, Zoning, Phasing. This project is approved for a maximum of 371 lots plus the three agricultural lots. Approximately 482 acres shall be rezoned to Planned Unit District (P-1) encompassing the proposed residential development lots, perimeter and internal project common areas. The remainder of the property will remain in A-4 zoning. Phased final maps are hereby authorized but not required. 3 . Final Development Plan. Prior to commencement of grading activity or filing a final map, a final development plan application shall be submitted and approved. Final development plan approval shall focus on and be limited to final design issues to assure compliance with the approved conditions and mitigation measures for the preliminary development plan and tentative subdivision map. Final development plan shall include design level detail comparable to a final subdivision map and shall be approved by the San Ramon Valley Regional Planning commission prior to approval by the Board of Supervisors of the Final Subdivision Map. Planning Commission review of the final development plan shall be scheduled within sixty days from the date of submittal of the design level plans to the Community Development Department and Public Works Department. The submittal plans shall provide for: A. Plan Details. Final landscape plans, final grading plan, building envelopes (including building setbacks and separations, and roadway plans) . These plans shall demonstrate that visual, grading, vegetation and other impacts have been addressed consistent with the mitigation measures required of the project and as 1 provided for in the tentative subdivision map and exhibits identified in Condition #1. B. Design Guidelines. Final design guidelines enforceable by the County and concurrent submittal of architectural plans, site plan, fencing plan and landscape plan for two lots to demonstrate how the design guidelines are going to be implemented. C. Preliminary Detention Basin Plan. The basin shall be primarily designed for hydrologic and aesthetic purposes only, and possible passive and active recreation purposes. The plans shall provide for the following information: 1) Grading plans at 40 scale indicating location of existing trees and whether they are proposed to be saved or removed. 2) Design and location of perimeter fence unless the fence can be demonstrated not to be appropriate. 3) The basin shall be designed as much as possible to simulate natural creekside terrain and minimize removal of trees upstream from the street crossing, using curvilinear design and providing maximum use of native trees and shrubs and boulders (naturally indigenous if at all possible) at the edges. While striving for high aesthetics, the basin shall also be designed for low maintenance cost. The basin shall be designed to satisfy the County's regional detention basin standards. Prior to Planning Commission approval of the final development plan, basin plans shall be submitted to the Public Works Department for review for compliance with Title 9 of the Subdivision Ordinance and for compliance with the standards for County detention basins. Prior to recordation of the final subdivision map the developer, at its expense, shall cause to be formed a geologic hazards abatement district (GHAD) or other entity acceptable to the Public Works Department for the purpose of taking title to the basin, performing necessary maintenance work, and accepting and funding any liability from the basin, including passive recreational use thereof (see also Condition 15) . The Board of Supervisors shall not be the board for the GHAD. The formation proceedings shall specify and include a mechanism acceptable to the County for funding, and for indemnifying and holding harmless the County, its officers and employees against any liability resulting from the design, construction, use, operation or maintenance of the basin. In addition, prior to recordation of the final subdivision maps, the developer shall, at its expense, cause to be established annual assessments, or other funding mechanism acceptable to the Public Works Department, for the purpose of assuring the perpetual funding of necessary maintenance work to the basin. It shall be provided in the formation of the GHAD and CC&Rs for the project that the GHAD shall not be terminated unless the Contra Costa County Flood Control District approves the termination, and accepts the ongoing obligation to maintain and repair the basin and the Public Works Department approves an alternative funding mechanism for the other maintenance and repair obligations of the GHAD. Prior to Planning Commission approval of the final development plan, the form of entity and 2 specific funding mechanism shall be identified to the satisfaction of the Public Works Department. D. Creekside Restoration Plan. This plan shall address all areas where grade changes are required to protect against erosion and to enhance scenic qualities and wildlife values. E. Proiect Gateway Design. This plan shall show frontage improvements for Norris Canyon Road and its intersection with "A" Drive, including appropriate improvements as recommended by the Public Works Department. The plans shall identify the required dedication area to accommodate the road widening. The gateway shall utilize special landscape. Special landscape treatment shall be proposed at the "A" Drive entrance. Existing trees shall be identified and whether they are proposed to be removed or saved. As few trees as possible shall be removed. The plans shall demonstrate adequate sight distance at the project intersection. F. Project Entrance Design. This plan shall be prepared for the area bounded by and including "S" Drive, "A" Drive, San Catanio Creek and the area of Lots 23-34 as shown on the proposed plans. The plans shall include preliminary landscape plans and indicate the location of existing trees. As few existing trees as possible shall be removed. G. Preliminary Norris Canyon Road Re-Alignment and Upgrade Plan. Prior to submittal of the final development plan for the project, the applicant shall provide directly or through an assessment district the Norris Canyon Road safety improvement and roadway redesign study and improvement plans for safety and planned improvements, subject to review and approval by the Public Works Department, which will identify the safety and other improvements needed on Norris Canyon Road to complete this traffic improvement. Final improvement plans and the final width of the right-of-way shall be determined at the final development plan. Because of the road's close proximity to the creek and the erosive nature of the creek, the improvement plans for this requirement shall be signed and stamped by a licensed geotechnical engineer. These plans shall indicate existing right-of-way location, intersecting property lines, City of San Ramon boundary line, existing roadbed and nearby topographic conditions and structures for the section of road between westerly the end of the road transitions needed at the project entrance and Bollinger Canyon Road. The preliminary plan shall indicate the improvements and right-of-way acquisition that would be needed to widen the roadway to a 34-foot width, with four-foot shoulders, to a design speed of 35 miles per hour or as otherwise acceptable to the Public Works Department, Road Engineering Division. Those improvements that are specifically needed to mitigate the safety impacts of this project shall be expressly identified (see also Condition 49. ) . The plans shall also identify the location of soundwalls (identified as mitigation in the Westside Specific Plan Program EIR and per Condition 41) which will be needed to mitigate the noise impact of this project. The design of the soundwall shall be based on an acoustical analysis prepared by a qualified professional based on the General 3 Plan projected traffic and planned widening of the roadway. A cross-section of the wall and any appropriate landscaping shall be included. The location of the wall relative to the road right-of-way and nearby structures and property lines shall be identified. The plans shall be accompanied by a detailed estimate of the cost of implementing the plans. Plans may be provided through an assessment district. A portion of the costs of preparing the plans shall be credited towards the project's South County Area of Benefit Fee. Creditable engineering costs and administration shall not exceed 12 .5% of the estimated project cost. H. Street Lighting Plan. This plan shall identify proposed street lighting plans for the project interior and the project entrance. Street lighting shall be provided at major intersections within the subdivision (at the two entrance points from Norris Canyon Road) . The plans shall indicate proposed placement of street lights, level of illumination, design of pole standards. Ornamental standards are encouraged for any necessary interior street lights. All street lighting shall utilize down- focused lights to minimize off-site glow. Prior to submittal to the Planning Commission, the Public Works Department, Engineering Services Division shall be provided an opportunity to review and comment on the plans. I. Fire Resistant Landscaping Program. Proposed plans for fire-resistant landscaping, including provision and maintenance of fire breaks, shall be submitted following opportunity for review by the San Ramon Valley Fire Protection District. J. Revised Community Park Plan. The proposed park plan shall be revised to include a tennis court with lights, basketball court, tot lot with functional (flat) lawn area, clubhouse and competition swimming pool. The plan shall specify the degree to which the facility satisfies the County code. In addition, a plan for recreation use of the detention basin area shall be submitted. Recreational uses within the detention basin shall be restricted to the Wiedemann Ranch homeowners association. No credit for the parkland dedication requirements shall be given for recreation facilities within the detention basin area. K. Water Tank Treatment. Pursuant to the Supplemental Environmental Impact Report, the Planning Commission shall review and approve plans for the water tanks. Sufficient information will be submitted to determine approximate tank dimension capacities, locations, architectural elevations, colors, landscape plans, grading and geotechnical reports for the Planning Commission's review and approval. The information shall demonstrate that the visual impacts of the water tanks are adequately mitigated. If it cannot be shown that the visual impacts of the tanks will be adequately mitigated, the tanks shall be buried. L. Additional Requirements for Residential Design Guidelines. Proposed subdivision landscape plans shall be prepared by a licensed landscape architect and shall be certified for compliance with the County Water Conservation Ordinance. Use of naturally indigenous trees and shrubs is encouraged. The applicant shall provide a suitable instrument guaranteeing to the County 4 the survival of the approved plantings for a period of at least 24 months following completion of planting. The plans shall demonstrate by design and selection of material compliance with Chapter 82-18 of the Zoning Code, "Sight Obstruction at Intersections". Prior to submittal to the Planning Commission, the Public Works Department, Road Engineering Division shall be provided an opportunity to review and comment on all landscape plans adjacent to roads and driveway intersections. M. Restrictive Covenant and Scenic Easement Instrument. A restrictive covenant and scenic easement instrument shall be recorded with the final map creating the agricultural lots (Lots 168, 188 and 223) of Subdivision 7575 and recorded against the deeds to those properties. The restrictive covenant and scenic easement instrument shall incorporate a three-tiered approach in limiting usage of each lot to agricultural use and one single-family residence with accessory agricultural structures, as set forth more fully in Condition 21. The instrument shall offer to dedicate development rights to the County on the three lots outside the development sites as set forth in Condition 21. The instrument shall be enforceable by both the County and the East Bay Regional Park District (EBRPD) . The form and content of the restrictive covenant and scenic easement shall be approved at the time of final development plan approval, along with a final regional and project trails, agricultural lots, open space, and scenic easement map (agricultural lots map) , consistent with and as set forth more fully in Conditions 4 and 25. 4 . Final Agricultural Lots Map. The final regional and project trails, agricultural lots, open space and scenic easement map (agricultural lots map) shall be substantially consistent with the plan set forth on the tentative agricultural lots map dated November 13 , 1992 , revised November 17 , 1992 . Public open space may be provided by gift; it is not required by this condition to be dedicated. The tentative agricultural lots map may be revised at the time of the final development plan after further consultation with and direction from the EBRPD. The regional trails shall be constructed in a manner approved by EBRPD and the private project trails shall be constructed by the applicant in a manner approved by the Zoning Administrator. To the extent reasonably feasible, the program for trail construction shall include the utilization of hand labor from the East Bay Conservation Corps or a similar work program. The final agricultural lots map may also include as an attachment a more detailed map showing proposed uses and footprints within the three development sites. If not provided as part of the final agricultural lots map at the time of final development plan approval, then a separate map showing uses and building footprints shall be subsequently approved by the Planning Commission for the development site of each agricultural lot prior to issuance of a building permit on that lot. Zoning Administrator approval of final design in each development site shall be required consistent with Condition 5. The above information shall be provided to the EBRPD upon application submittal to the County. 5. Zoning Administrator Review of Individual Lots. At least thirty (30) days prior to issuance of building permits, the property owner shall submit architectural plans, site plan, fencing plan, and landscape plan for each lot to the Zoning Administrator for review and approval for the following lots: 1) lots identified as potentially visible in Viewsheds #1, 2, 3 and 4 on pages 2-46, 2-49, 2-53 , and 2-56 in the Final SEIR (Lots 25-82 , 160-167 , 172-204, 219-239, 282-284 , 291-319 [some 5 of these lots are also those potentially visible from Bishop Ranch Open Space so that viewshed is addressed, too] ) ; 2) the lots in Subdivision 7578 (in order to address views of them from Norris Canyon Road [the higher lots above that are included within one of the other four viewsheds above] ) ; and 3) the development sites in each of the three agricultural lots. The purpose of such review is to confirm that the individual home and building site have been designed to substantially mitigate visibility off-site and to be sensitive to the topography with minimal grading consistent with the design guidelines and mitigation measures for the project. The approved landscape plan shall identify those trees that are required to be planted to mitigate visibility of the home. The above information shall be provided to the City of San Ramon Planning Department at the time of application submittal to the County. 6. Limitations on Tree Removal. Trees planted as part of the reforestation program and in common areas, trees planted on an individual lot to mitigate visibility of the homes and trees that have been preserved on the project site shall not be removed unless an application by the Homeowners' Association Architectural Review Board is first approved by the Zoning Administrator following a public hearing. On any of the three agricultural lots, trees shall not be removed from the third tier scenic easement area unless an application by the owner is approved by the Zoning Administrator with simultaneous provision of the information to the EBRPD for their review and comment. In the second tier agricultural use area, trees may be removed only for purposes of routine land management (e.g. dead, fallen or diseased trees) , unless otherwise first approved by the Zoning Administrator. In the first tier development sites, tree removal shall be allowed only as provided for in the final design approval for the development site in each agricultural lot or as otherwise subsequently first approved by the Zoning Administrator. 7 . Contingent Approval of Subdivisions. The approval of Subdivisions 7575 and 7578 is contingent on final approval by the Board of Supervisors of Rezoning File #2947-RZ and Preliminary Development Plan #3005-91. The requirements of the subdivision approval are subordinated to any modifications to the project rendered by the Board of Supervisors. Agricultural Preserve Contracts 8. Contingent Precedent to Development. No final map may be recorded, nor non-agricultural development or grading activity may commence until the existing restrictions of the Agricultural Preserve Contract affecting the development area that has been rezoned P-1 has become null and void either by expiration or by cancellation action of the Board of Supervisors. Urban Service Reorganization 9. Boundary Reorganization Requirement. Urban service boundary reorganization shall be consummated through the Local Agency Formation Commission (LAFCO) . Prior to filing a final map or issuance of grading permits, evidence shall be submitted to the Zoning Administrator that the approximate 482 acre development site consisting of residential lots, internal and perimeter project common area has been annexed to the Central Sanitary District and the East Bay Municipal Utilities District (EBMUD) verifying that adequate capacity exists supply consistent with Water Policy Implementation Measure 7- i to specifically service the project. The area of Lots 168, 188, and 223 (the agricultural lots) of Subdivision 7575 shall not be included in any utility annexation. See also Advisory Note L. 6 Geotechnical 10. As-Graded Map. Prior to issuance of building permits on parcels of this subdivision, submit as-graded reports of the engineering geologist and the geotechnical engineer to Community Development and Building Inspection Departments with an as-graded map showing final plan and grades. The map shall identify all encountered faults, aquifers, and stratigraphic (bedrock) units; zones of highly jointed and/or deeply weathered rock; orientation of bedding and/or other discontinuities, and the location of any seepage, fill keyways, and subdrainage material with cleanouts, outlets, and pickup points; buttress fills with keyway location, any retaining walls installed, subdrains and their connections, and other soil improvements installed during grading, all as surveyed and mapped by a licensed land surveyor or civil engineer. 11. Grading Bond. A grading bond is required for the work necessary to carry out the grading plan and Final Development Plan. Provide sufficient information to estimate the cost of required soil improvements, or a contractor's estimate. 12 . Recorded Geotechnical Statement. Record a statement to run with deeds to parcels of the property acknowledging the geotechnical reports by titles, author (firm) , and dates, calling attention to recommendations, and noting that the report is available to prospective buyers from the owner. 13 . Final Geotechnical Review. In accord with the Supplemental Environmental Impact Report for the Wiedemann Ranch Residential Community Project, the applicant shall adhere to the following requirements: A. Prior to final development plan approval geotechnical criteria for the project shall be submitted for the review and approval by the Zoning Administrator. B. If explosives are necessary to aid grading activities, a special permit shall be obtained from the San Ramon Valley Fire Protection District (SRVFPD) . Landslide Repair/Maintenance 14 . Detailed Landslide Repair Plans. Prior to final development plan approval, submit detailed landslide repair plans identifying specific landslide repair techniques for each landslide on the project site as identified in the Landslide Repair Plans prepared by Harlan Tait Associates to Community Development and Building Inspection Departments for review and approval. Pursuant to the Supplemental Environmental Impact Report, landslide repair techniques for landslides #4, #5, #15, #16, #19, #46 and #58 shall not be "remove and replace" but other suitable methods which avoid impacting creek areas. 15. GHAD Formation. Pursuant to the Supplemental Environmental Impact Report, and prior to filing of the first phased final subdivision map, a geologic hazards abatement district (GHAD) shall be formed of the project property owners to finance the maintenance of slopes, drainage terraces, subdrains and detention basin prior to the filing of the first final map (see also Condition 3 .C. (3) ) . The three agricultural lots shall be included in the GHAD. Any private land that may be deeded to EBRPD shall not be included in the GHAD. The three agricultural lots shall not be responsible for maintenance or repair in the P-1 project area. All lot owners shall be responsible, on a pro rata basis, for the cost of necessary repairs to the three agricultural lots where GHAD-related activities impact the P-1 project area or adjacent public lands. The cost of other repairs and routine maintenance 7 shall be the responsibility of the individual agricultural lot owner. A covenant shall be included in the CC&Rs for the properties that precludes dissolving the GHAD without first obtaining approval from the Board of Supervisors and without first having maintenance of the detention basin accepted by the Contra Costa County Flood Control District. Public lands shall not be included in the GHAD. Holders of public easements located inside the GHAD shall have no responsibility under the GHAD. The GHAD shall otherwise be consistent with the restrictions imposed through Condition 40. Grading/Tree Preservation Plan 16. Grading/Tree Preservation Plan Submittal Requirements. Submit a grading/tree preservation plan prior to final development plan approval providing for: A. Tree Survey. The plan shall identify all trees with a trunk circumference of 20 inches or greater with trunks within 40-feet of areas proposed for grading. Reasonable efforts shall be made to minimize the loss of or potential damage to existing trees. The plans shall identify the trunk circumference, approximate canopy area, species, and whether the tree is to be preserved or removed. The plan shall be prepared with the assistance of a licensed arborist. The plan shall provide suitable measures to assure protection of trees during the construction period. The survey of trees shall provide for a tally of the number and trunk circumference of trees to be removed. The aggregate trunk circumferences of trees proposed for removal shall be totalled. Also see heritage tree nomination requirement below. B. Cut and Fill Slopes. Drainage terraces for cut and fill slopes shall be spaced per grading code requirements. All cut or fill slopes greater than 30 vertical feet in height shall be contour-rounded. C. Botanical Project. The grading shall provide for balanced cut and fill on-site (i.e. , no import or export of fill material) . D. Surface Runoff Requirements. To reduce long-term erosion and sedimentation impacts on downstream water quality, grading plans shall be designed such that no surface run- off shall be directed onto cut or fill slopes. All graded slopes shall have either brow ditches or berms at the crest to control surface run-off. These drainage structures shall be underlain by subdrains. Run-off from graded surfaces shall be intercepted by closed conduits and conveyed to adequate storm drainage facilities. E. Retaining Wall Details. A sample section and color of proposed retaining walls shall be submitted with the Final Development Plan application. F. Tree Replacement Program. The grading/tree preservation plan shall provide for a tree replacement program and plan in accord with the proposed reforestation program. The plan shall require replacement of trees in accord with the applicants program. The plan shall be accompanied by an estimate of the cost of materials and labor to complete the work. The approved plan shall be installed with the phases of the subdivision infrastruc- ture and grading. The applicant shall be responsible for protecting the trees for a period of 36 months after planting. Ninety days after planting, a landscaped 8 architect shall inspect the plantings and prepare a report to the Zoning Administrator on the condition of the new trees. Any failing trees shall be replaced. A bond shall be required in order to assure compliance with this tree planting requirement. Reforestation trees shall be planted by hand. The reforestation program, including the monitoring and maintenance program for at least five years consistent with Condition 17, shall be approved by the Zoning Administrator. The program shall include provisions to utilize the East Bay Conservation Corps or a similar work program to complete and initially maintain the reforestation program, unless the applicant demonstrates that including such a work program is not reasonably feasible. G. Erosion Control Plan. A construction period erosion control plan shall be submitted. H. Haul Routes. To avoid unnecessary scarring of hillsides, haul routes for grading activity shall be generally limited to those areas of the site which are proposed to be graded. Hauling of material through the approved scenic easement shall be precluded. The grading/tree preservation plan shall provide delineation of the perimeter of areas and trees to be preserved by use of taping and stakes, or other appropriate barriers. These barriers shall be installed prior to commencement of grading activity. I. Tree Preservation Bonding Program. To assure protection and/or reasonable replacement of exiting trees to be preserved which are in proximity to subdivision improvements, the applicant shall post a bond (or other surety) for the required work with the Community Development Department. The term of the bond shall extend at least 16 months beyond the completion of required subdivision improvements. Prior to posting the bond, a licensed arborist shall assess the value of the trees and reasonable compensatory terms in the event that a tree to be preserved is destroyed or otherwise damaged by subdivision-related activity. The tree bonding program shall be subject to the review and approval of the Zoning Administrator. 17 . Tree Preservation Measures. In accordance with the Supplemental Environmental Impact Report, the project applicant shall adhere to the following requirements: A. Limits on Heavy Equipment. Heavy equipment shall be restricted to the minimum area suitable for equipment operation. B. Protection From Grading. Tree trunks adjacent to construction areas shall be protected by fencing or other barriers to avoid physical damage. Protection shall extend outside drip lines to prevent trunk and limb damage and soil compaction. C. Tree Thinninct. Trees where roots are covered with impervious surfaces, or roots removed, shall be thinned to compensate for loss of function. D. Arborist. A licensed arborist shall monitor construction activities as required. 9 E. Tree Replacement Ratio. Replacement of all impacted woodland habitat in a ratio of 3 acres to every acre impacted. F. Initial Planting Requirements. Initial planting shall be higher than necessary to account for a 10% annual mortality rate (see Biotic Resource Assessment and Habitat Mitigation Plan) . G. Reforestation Monitoring. All reforestation areas shall be monitored for at least five years for mortality, vigor, height and canopy diameter. Vigor shall be based upon qualitative comparison of foliage density, leaf color and turgor, and stem caliber found in like species in adjacent native habitat. H. Tree Survival Rate. A 90% annual survival rate shall be met during the initial 5-year monitoring period. Any mortality above this rate shall be replanted. I. Planting and Irrigation Requirements. Saplings and rooted acorns shall be planted in irregular spacings and watered with a drip irrigation system. Irrigation shall continue for a minimum of three growing seasons. Erosion Control Measures 18. Erosion Control Plan Requirements. Prior to final devleopment plan approval, the project applicant shall submit to the Community Development and Building Inspection Departments an erosion control plan for the review and approval of the Zoning Administrator. The construction stage erosion control plan shall provide for the following measures: A. Grading Season. All grading, excavation and filling shall be conducted during the dry season (April 15th through October 15th) only, and all areas of exposed soils shall be replanted to minimize erosion and subsequent sedimentation. Any modification to the above schedule will be subject to review by the Grading Section of the Building Inspection Department. B. Revegetation/Erosion Control Plan. Prior to final development plan approval, a revegetation/erosion control plan shall be prepared. The plan shall emphasize use of drought tolerant native species that are adaptive to conditions on the project site. The plan shall provide that all disturbed areas be hydromulched with a mixture of 90% annual grass/10% wildflower per the Biotic Resource Assessment and Habitat Mitigation Plan by October 15th of each construction season or as determined appropriate by the grading section of the Building Inspection Department. The revegetation/erosion control plan shall be reviewed and approved by the Grading Section of the Building Inspection Department. C. Temporary Erosion Control Measures. The erosion control plan shall show the location of proposed temporary detention basins, silt fences and straw bales. It shall also contain provisions for: 1) Performing maintenance during the winter rainy season, as necessary. 2) Regular inspections by the project engineer during the winter rainy season. 3) Spot inspection during/immediately following severe storms. 10 Fencing Plan 19. Private Fencing. Privacy fencing shall be allowed only along the side property lines of each lot where adjacent structures are within the Development Area defined on each lot. Privacy fencing shall consist of 1 x 6 boards attached to a 2 x 6 cap and a 1 x 4 trim supported by 4 x 6 posts on six-foot centers.. Privacy fencing shall be no higher than six feet. Privacy fencing standards shall be included in the project design guidelines. 20. Perimeter Fencing. The perimeter of the development area and Private Open Space Areas of each lot shall be either: unfenced or restricted to deer fencing. Deer fencing shall consist of a 2" x 4" welded wire black fabric. Deer fencing shall be six feet high supported by 4 x 4 wood posts on eight-foot centers. Fencing standards shall be included in the project design guidelines. Open Space and Heritage Tree Nomination 21. Restrictive Covenant and Scenic Easement Instrument. The applicant shall submit for review and approval by the Planning Commission with the final development plan application, a proposed restrictive covenant and scenic easement instrument describing the uses and development limitations on agricultural lots (Lots 168, 188 and 223 of Subdivision 7575) . The restrictive covenant and scenic easement instrument shall include a provision that written approval from the EBRPD shall be required prior to any future subdivision of these parcels or changes or amendments in the restrictive covenant and scenic easement instrument and that it is specifically enforceable by the EBRPD as a third party beneficiary. The instrument shall be based on the following: A. First Tier. In the first tier development sites: (1) A limit of one residence along with ancillary and agricultural structures (e.g. , detached garage, guest house, barn, winery, stables) on each lot. The development sites for these structures shall be restricted to the specific three areas identified on the final agricultural lots map. No structure shall be allowed outside the development sites and development inside the development sites shall be reviewed and approved, consistent with Conditions 4, 5 and 21, by the Planning Commission and Zoning Administrator, with provision of the information to the EBRPD upon application submittal to the County. (2) Agricultural and related uses, such as livestock production, orchards and vineyards, pasturing of horses or other livestock, and open space land, trails and fire protection management. (3) Livestock grazing and open space land, trails and fire protection management. B. Second Tier. In the second tier agricultural use areas, only the use set forth in A(2) above -shall be allowed. C. Third Tier. In the third tier scenic easement area, only the uses set forth in A(3) shall be allowed. The three tiers shall be clearly depicted on the final agricultural lots map which shall be recorded along with the restrictive covenant and scenic easement instrument. 11 22 . Parcel "D" Merger. Parcel "D" as shown on the Tentative Map of Subdivision 7575 shall be merged with Lot 188 . 23 . Heritage Tree Designation. Concurrent with the final development plan application, the applicant shall apply to the County for heritage tree designation for trees to be preserved on the property pursuant to Section 816-4 . 404 of the Zoning Code. The submittal shall include a nomination request for tree groves in the approved common open space area and other significant trees; and shall be accompanied by the grading/tree preservation plan and tree replacement program approved by the Zoning Administrator. The submittal shall by prepared by a licensed arborist and shall provide detailed information on trees with trunks within 40 feet of proposed grading or other development. The survey shall include information on trunk circumference, tree species, and canopy of individual trees. The nomination proposal shall provide for a suitable marking of designated heritage trees. The number of trees designated for heritage status may be increased or diminished from those nominated by the applicant. The submittal shall include a proposed notice, upon Board of Supervisors designation action, to be used to inform prospective buyers of the heritage tree program, and the process that must be followed in order to remove or otherwise damage a tree. 24 . Limitation on Tree Removal. No trees shall be removed from any of the property prior to approval of the grading/tree preservation plan without the prior approval of the Zoning Administrator. Regional Trail Dedication 25. Final Regional Trail Alignment; Funding for Maintenance. The final regional trail alignment as set forth on the final agricultural map shall be determined at the time of final development plan approval (see also Condition 4) . The alignment provided for in the tentative agricultural lots map may be modified following additional review and input by the EBRPD. All offers of dedication shall be made to the EBRPD prior to approval of the first phased final subdivision map in the project. For regional trail and emergency vehicle and maintenance access (EVMA) alignments inside private property, trail and EVMA easements shall be offered for dedication to the EBRPD, or if it does not accept the alignment, then offered to the County. Other easements on or across public land or trails may be authorized and their terms defined at the final development plan and final agricultural lots map approval. The applicant shall be responsible for making regional trail and EVMA improvements (on Lot 168 , the applicants responsibility for EVMA improvements is limited to the alignment east on the access road to the development site) in the manner and design approved by EBRPD and dedicating them by the time the last residential building permit for each phased subdivision is approved, unless EBRPD otherwise agrees to extend the time for trail construction and/or acceptance. A landscaping and lighting district, or another funding mechanism acceptable to the County, with input from EBRPD, shall be provided whereby the property owners in the project (not including the owners of the three agricultural lots) shall be responsible for financing the cost of maintaining any public open space within the project site, including the regional trails. Actual maintenance of their lands and easements will be provided by the EBRPD. 12 26. Regional Trail to Wiedemann Hill. The regional trail only from "A" Drive to the top of Wiedemann Hill shall be via an all-weather surface (i.e. , the existing gravel road) to provide access for pedestrians. An easement shall be offered for dedication to the EBRPD. If the EBRPD does not accept it, then it shall be offered to the County. If it does not accept it, then it shall be maintained as a project trail available to the public for such pedestrian access. Trail improvements shall be constructed by the applicant and maintained consistent with Condition 25. Due to safety consideration, vehicle access shall be restricted to service vehicles related to communication site activities, emergency vehicles, and owners of the agricultural lot. 27 . Norris Canyon Trail. As part of the final development plan application, the applicant shall prepare a proposed trail easement for a trail running parallel to Norris Canyon Road. The applicant shall provide the Public Works Department, Road Engineering Section and City of San Ramon Planning Director and City Engineer an opportunity to review and comment on the plans. Prior to filing a final map, the applicant shall make an offer of dedication of the approved trail easement. The applicant shall have the option of withdrawing the offer of dedication of the trail easement if the County and/or City has not constructed the trail improvements within 10 years from the issuance of the final map for the final phase of the subdivision. Ownership of easement would revert to the Homeowner's Association. Project Common Facilities and Landscaping 28 . Detailed Common Facilities Plans. As part of the final development plan application, the applicant shall submit detailed development plans for any common facilities located within that particular map phase for the review and approval by the Planning Commission. All approved facilities shall be completed prior to issuance of building permits within the phase in which the common facilities are located. 29. Detailed Common Facilities Landscape Plans. Landscape plans for all common areas shall be prepared by a licensed landscape architect. Plans shall be certified for compliance with the Water Conservation in New Developments Ordinance (No. 90-59) . Proposed shrubs shall be a minimum 5-gallons in size; proposed trees shall be a minimum 15-gallons in size. Prior to approval, the East Bay Municipal Utility District and Public Works Department, Road Engineering Section, shall be provided an opportunity to review and comment on the plans. Landscaping shall be designed so as to minimize landscape maintenance costs. Approved common area landscaping shall be installed prior to occupancy of units for each phase of the subdivision. Revised Design Guidelines 30. Final Design Guidelines. The proposed design guidelines shall be revised to provide for the following: A. Deed Restriction. Design restrictions shall be made enforceable by the County. B. Garages. The minimum setback from the road right-of- way for front-entry garages shall be 18 feet; side-entry garages shall observe a minimum setback of 12 feet. Any proposed placement of garages within the specified setback areas shall be considered on a case-by-case basis and only where it can be documented that no adverse sight-distance problems will result (e.g. , end of cul- de-sacs) . All garage doors shall be designed as automatic sectional doors. 13 C. Minimum Lot Gradient. All lots shall have a minimum gradient of 1. 5% to ensure proper drainage. All paved surfaces shall have a minimum of 1% gradient. D. Lot Areas. Each lot shall be divided into three areas as follows: 1) Building Area: Shall be the area on each lot within which the primary residential structure and accessory structures can be constructed. This would include attached garages. The building area shall also include the primary parking area(s) , fences and irrigated landscaped areas on each lot. 2) Controlled Development Area: Shall be the area within which ancillary structures such as pools, gardens and in some case detached garages can be constructed. Fire control measures shall be enforced within this area. 3) Private Open Space Area: Shall be the portion of each lot within which no development can occur. The development envelopes shall be established prior to issuance of building permits and submitted to Community Development and Building Inspection Departments. E. Lot Setbacks. Front yard setbacks of 25 feet, sideyard setbacks of 15 feet, and backyard setbacks of 25 feet should be maintained wherever possible. However, exceptions from the setback standards may be appropriate due to site constraints and for lots along the south side of "A" Drive in the vicinity of the cross valley ridge to reduce off-site visual impact. F. Creek Setbacks. A 100-foot setback from creeks shall be maintained by all abutting structures measured from the centerline of the creek. Scenic easements may be recorded where appropriate to ensure limitations on development. The scenic easement shall not take the place of development rights deeded to the County as required by Section 914-14 . 012 , "Structures Setback Lines for Unimproved Earth Channels. " G. Individual Lot Grading. Individual lot grading shall employ contour grading concepts. Approval by the Building Inspection Department shall include grading permit requirements. H. 3 : 1 Slopes. All grades or non-structural slopes shall be 3 : 1 or flatter unless supported by geotechnical engineering reports. I. Foundation Design. Buildings shall be designed to work with the existing topography of the site. Split pads, stepped footings, pier and grade beam foundations shall be employed to fit each structure to the slope of each lot. J. Roof Forms and Lines. Roof forms and roof lines shall be designed to break up the mass of the roof. Irregular roof lines shall be utilized to avoid long, linear unbroken roof lines. K. Visual Design Restrictions. Large gabled ends on downhill elevations, overhanging stilted decks, large walls in single planes and retaining walls should be 14 avoided. Retaining walls should be broken into smaller components and terraces where feasible. L. Maximum Building Heights. Maximum building heights shall be 35 feet. Height of the houses along the south side of "A" Drive shall be subject to the review and approval of the Zoning Administrator. M. Exterior Colors and Materials. Building colors shall be earthtones. Bright colors (reds, blues and greens) shall be avoided. Exterior wall and roof colors and materials shall utilize medium-to-dark earth-tone colors, defined as less than 50% light reflectance. A licensed architect shall certify submitted elevations for , compliance with this requirement. Exterior walls shall be of wood siding, wood shingles, brick or masonry, natural colored cement plaster, or other similar natural texture and colors. Roofs shall be flat concrete shingles, clay tile (earthtones only) or other suitable roofing material of earthtone colors. N. Architectural Review Board. In accord with the proposed CC&Rs, an internal Architectural Review Board shall be created to review and approve plans in accordance with the residential design guidelines prior to submittal of plans to Community Development and Building Inspection Departments. O. Design Restrictions Near Cross-Valley Ridge. Lots along "A" Drive in the vicinity of the cross-valley ridge (Lots 25-58 and 172-183) shall be subject to architectural review by the Zoning Administrator pursuant to the requirements of this condition and the Supplemental Environmental Impact Report which identified the following restrictions on these lots. 1) Possible reduction of structure height to reduce visual impacts shall be subject to approval of the Zoning Administrator. 2) Variable sideyard setbacks to reduce massing. 3) Reduced front yard setbacks from the minimum 25 feet. 4) Additional landscape requirements for backyards. 5) Muted roof colors. Maximum structure height, minimum sideyard setbacks and minimum front yard setbacks shall be determined as part of the final development plan approval. P. Minimum R-15 and R-20 Standards. Front yard, side yard and rear yard setback standards as defined in the project design guidelines shall apply (consistent or greater than R-20 standards) . Where the project design guidelines are silent, the development provisions of the R-15 Single Family Residential District (for lots from 15, 000 to 19, 999 square feet) , and R-20 Single Family Residential (for lots 20, 000 square feet or greater) shall apply. Fire 31. Fire Safety Development Requirements. Pursuant to the Supplemental Environmental Impact Report, the project shall adhere to the following requirements: A. Street Gradients. Street gradients shall not exceed 20% and rough asphalt or grooved pavement used in areas where 15 road gradients would exceed 15%, subject to the review and approval of the Public Works Department. B. Fire Protection Management Program. The San Ramon Valley Fire Protection District's (SRVFPD) weed abatement criteria shall be incorporated into the subdivision's Covenants, Conditions and Restrictions (CC&Rs) and project design guidelines to provide a fire protection management program (see also Condition 37) , and in the management requirements. for the three agricultural lots as part of the approved range management plan which will incorporate fire management. EBRPD shall be consulted in regard to the appropriate fire protection management program. C. SRVFPD Review Prior to Building Permits. Building permits shall be submitted to the SRVFPD for review prior to being issued. D. Buffer Zone Fire Break. The buffer zone around the development area shall be maintained as a fire break in accordance with SRVFPD standards. E. Roofing Materials. All roofing materials shall be class A, B or better. F. Automatic Sprinkler Systems. All residences shall be equipped with automatic fire extinguishing sprinkler systems. G. SRVFPD Review Prior to Final Subdivision Map. Fire hydrant locations, vehicle turnarounds, temporary access roads, driveway accesses, and smoke detectors plans shall be submitted to the SRVFPD for review and approval prior to filing a final subdivision map. 32 . Second Access Road. A second access road extending from "T" Court south in Subdivision 7575 shall be provided. In addition, a second 2-lane bridge shall be constructed from "T" Court north in Subdivision 7578 to Norris Canyon Road. This second access route shall be constructed to public road standards consisting of 24 feet of pavement, measured curb- to-curb with no parking allowed on either side. In addition, an emergency access gate shall be installed on the second access road between the subdivisions to limit usage to only the Fire District. The San Ramon Valley Fire Protection District shall provide specifications for the gate. Public Protection 33 . Facility Standard Fee. In accordance with the Supplemental Environmental Impact Report, the project applicant shall pay a facility standard fee, if appropriate, (equal to the costs of constructing 155 square feet of department facilities per 1, 000 residents) as determined by the Contra Costa County Sheriffs Department. The fee shall be paid with the issuance of individual building permits. 34 . Funding for Augmented Police Services. With the recordation of a final map, the owner shall participate in the provision of funding to maintain and augment police services by voting to approve a special tax for the lots created by this subdivision approval. The tax shall be the per parcel annual amount (with appropriate future Consumer Price Index adjustment) then established at the time of voting by the Board of Supervisors. The election to provide for the tax shall be completed prior to the filing of the Final Map. The property owner shall be responsible for paying the cost of holding the election, payable at the time that the election is requested by the owner. 16 Alternatively, the applicant may provide evidence that he has entered into an agreement with the City of San Ramon for supplemental police services to serve the project. Transportation Demand Management Program 35. TDM Program. At least 30 days prior to filing a Final Map, the applicant shall submit two copies of a Transportation Demand Management (TDM) Program in accord with the requirements of Ordinance No. 92-31. The applicant should contact the County TDM coordinator in the Community Development Department at 646-2131 regarding any questions on the program requirements. Child Care Ordinance 36. Child Care Program. At least 60 days prior to recording a final map, the applicant shall submit a demand study for child care facilities generated from the future project residents and an appropriate response program in accord with Ordinance 88-1, the Child Care Ordinance. The demand study and response program shall be subject to the review and approval of the Zoning Administrator. Prior to recording the final map, the applicant shall submit evidence that he has complied with whatever program requirements have been imposed. Covenants, Conditions and Restrictions (CC&R's) 37. CC&Rs Review and Approval. Prior to final development plan approval, a copy of the project's Covenants, Conditions and Restrictions (CC&Rs) shall be submitted to the Community Development Department for review and approval. A copy of the proposed CC&Rs shall be provided to the EBRPD upon submittal to the County. The document shall provide for maintenance of common open space, fire break protections, and maintenance of any internal, private roads. The document shall reference the approved residential design guidelines, slope and drainage improvements maintenance plan and fencing plan program. In accord with the County Child Care Ordinance, the CC&Rs shall indicate that a child care facility may be located at any residential unit, or lot, consistent with the existing laws. Drainage Crossings 38 . Design of Crossing Structures. Drainage crossing structures shall be designed in accordance with the Biotic Resource Assessment and Habitat Mitigation Plan. Prior to filing a final map, final drainage crossing plans shall be submitted to the Public Works Department for review and approval. Aquatic Habitat Plan 39. 3 : 1 Replacement Ratio. All impacted wetlands and "waters of the United States" shall be replaced in a ratio of 3 acres for every 1 acre impacted. 40. Additional Permits. Prior to the issuance of a grading permit, the project applicant shall secure all necessary permits and agreements from the U.S. Army Corps of Engineers and California Department of Fish and Game. Copies of the permits from these agencies shall be provided to the Zoning Administrator Noise 41. Sound Walls. The applicant shall install sound walls where needed with the Norris Canyon Road improvements, as determined 17 I by the County to address sound impacts of current existing traffic plus this project. Agricultural 42 . Agricultural Proximity Sales Disclosure Statement. The project applicant shall include a sales disclosure statement with each lot stating that they are in close proximity to existing agricultural activities (including agricultural activities on Bishop Ranch Regional Open Space) which may result in nuisance and hazards. 43 . Agricultural Activities Informational Booklet. Prior to the issuance of building permits for the project, the project applicant shall submit to the Community Development Department for review and approval an informational booklet to be distributed to project residents upon purchase describing the adjacent agricultural activities, potential hazards and ways for residents to minimize potential hazards. Construction Period Restrictions 44 . Time Limits on Construction Activity. Noise generating construction activity (including playing of loud radios or music) shall be limited to the hours of 7 : 30 A.M. to 5: 00 P.M. , Monday through Friday, and shall be prohibited on State and Federal holidays. The restrictions on allowed working days may be modified on prior written approval of the Zoning Administrator. 45. Recyclable Construction Materials. The applicant shall provide for the separation of recyclable construction material, such as wood waste and inert solids, at the construction site. Provisions for the separation of recyclables shall be consistent with the County Source Reduction and Recycling Element. Any questions on satisfying this requirement should be directed to the County Recycling Specialist in the Community Development Department at 646-4198. 46. Notice of Construction Work Commencement. At least one week prior to commencement of grading, the applicant shall post the site and mail to the owner of property within 300 feet of the exterior boundary and to the homeowner associations of nearby residential projects, that construction work will commence. The notice shall include a list of contact persons with name, title, phone number and area of responsibility. The person responsible for maintaining the list shall be included. The list shall be kept current at all times and shall consist of persons with authority to initiate corrective action in their area of responsibility. The names of individuals responsible for noise and litter control, tree protection, construction traffic and vehicles, erosion control, and 24-hour emergency number, shall be expressly identified in the notice. The notice shall be reissued with each phase of major grading and construction activity. Copies of the notice shall be concurrently transmitted to the Community Development Department. The notice shall be accompanied by a list of the names and addresses of the parties noticed, and a map identifying the area noticed. 47 . Dust Control/Reclaimed Water. The project shall comply with the dust control requirements of the Grading Ordinance including provisions pertaining to water conservation. Reclaimed water shall be used for dust control unless determined to be infeasible by the Zoning Administrator. 18 48. Archaeological Resource Requirements. Comply with the following archaeological resource requirements: A. Notification if Significant Cultural Materials Located. If any significant cultural materials such as artifacts, human burials, or the like are encountered during construction operations, such operations shall cease within 10 feet of the find, the Community Development Department shall be notified within 24-hours and a qualified archaeologist contacted and retained for further recommendations. Significant cultural materials include, but are not limited to, aboriginal human remains, chipped stone, groundstone, shell and bone artifacts, concentrations of fire cracked rock, ash, charcoal, shell, bone, and historic features such as privies or building foundations. B. Mitigation of Cultural Resources. Appropriate mitigation of the cultural resources may include monitoring of further construction and/or systematic excavation of the resources. Any artifacts or samples collected as part of the initial discovery, monitoring or mitigation phases shall be properly conserved, catalogued, analyzed, evaluated and curated along with associated documentation in a professional manner consistent with current archaeological standards. Road, Utility and Drainage Requirements 49. Compliance Requirements. Comply with the following road, utility and drainage requirements: A. Conformance with Title 9 ; Exceptions. In accordance with Section 92-2 . 006 of the County Ordinance Code, this subdivision shall conform to the provisions of the County Subdivision Ordinance (Title 9) . Any exceptions therefrom must be specifically listed in this conditional approval statement. Conformance with the Ordinance includes the following requirements: 1) Construct road improvements along Norris Canyon Road based on a 35 mile per hour design speed, 34-foot road width with bike lanes and 4-foot all weather shoulders. The road improvements shall provide left turn channelization at the project entrances in accordance with Caltrans standards subject to the review of the Public Works Department, Road Engineering Division, and the review and approval of the Zoning Administrator. The applicants Norris Canyon Road frontage improvements shall not be credited toward the Countywide Area of Benefit obligation. Design exceptions shall be evaluated on a case by case basis by the Public Works Department at the time of final development plan approval. This condition does not imply that exceptions shall be made. 2) Install safety street lighting and annex the property to County Service Area L-100 for maintenance of the street lights. Lighting shall be located only at the project entry intersections with Norris Canyon Road, at the intersection of "A" Drive with "S" Drive, at the intersection of "A" Drive with itself, at the intersection of "A" Drive with "B" Drive, and the intersection of "A" Drive with "K" Drive. 3) Construct a paved hammerhead turnaround at the end of the proposed private road/common driveways. 19 4) Underground all subdivision utility distribution facilities, including those existing on the Norris Canyon Road frontage. 5) Convey all storm waters entering or originating within the subject property, without diversion and within an adequate storm drainage facility, to a natural watercourse having definable bed and banks or to the detention basin facility which conveys the storm waters to a natural watercourse. 6) Design and construct storm drainage facilities required by the Ordinance in compliance with specifications outlined in Division 914 of the Ordinance and in compliance with design standards of the Public Works Department. 7) Install, within a dedicated drainage easement, any portion of the drainage system which conveys run- off from public streets. 8) Relinquish "development rights, " or convey other instrument acceptable to the Public Works Director, over that portion of the site that is within the structure setback area of the creek. The structure setback area shall be determined by using the criteria outlined in Chapter 914-14 , "Right of Way and Setbacks" of the Subdivision Ordinance. Due to the nature of the creeks in this area the structural setback may be determined from a soils report. The applicant shall submit the soils geological and geotechnical report for review by the Public Works Department, Flood Control Division, showing slope stability, a proposed structural setback line, and construction methods for buildings to be located on the adjacent slope. The structure setback line shall be shown accurately on the final development plan and the Final Maps. The instrument dedicating development rights shall provide that the individual homeowners may apply to the Public Works Department to place accessory structures within the setback line (e.g. gazebos) , subject to the review and approval of the Department. 9) Submit improvement plans prepared by a registered civil engineer, payment of review and inspection fees, and security for all improvements required by the Ordinance Code or the conditions of approval for this subdivision. These plans shall include any necessary traffic signage and striping plans for review by the Public Works Department. 10) Submit phased final subdivision maps or one final map prepared by a registered civil engineer or licensed land surveyor. 11) Exceptions to public road standards consistent with the revised standards set forth in Condition 49 . I. are hereby allowed. B. Norris Canyon Road Improvements; Time of Construction. The applicant shall improve the offsite portion of Norris Canyon Road from the westerly conform back to the existing Norris Canyon Road roadway to Bollinger Canyon Road to a 34-foot wide roadway within an adequate right of way and with necessary slope easements. The improvements shall include bike lanes and four-foot all weather rock shoulders along with safety improvements, capacity improvements, and necessary reconstruction. The 20 improvements shall be designed for a design speed of 35 miles per hour, or, as approved by the Public Works Department, Road Engineering Division. The applicant shall be required to construct any necessary safety improvements prior to construction of any major public or private facilities (except on-site balanced grading operations) . and prior to issuance of building permits in these two subdivisions, unless otherwise approved by the Public Works Department. The safety improvements shall include provision of adequate horizontal clearance, widening to allow trucks to make the tight turns, and provision of adequate all-weather shoulders. Prior to issuance of the 150th building permit for the two combined subdivisions, the applicant shall construct capacity improvements along the offsite portion of Norris Canyon Road. The capacity improvements shall include widening Norris Canyon Road to its 34-foot road width with bike lanes and 4-foot all weather shoulders. The applicant shall be responsible for obtaining on-site and off-site rights of way, slope easements and other land rights for the improvements required at each phase of this development. C. Signal at Norris Canyon Road and Bollinger Canyon Road. Install the traffic signal at the Norris Canyon Road/Bollinger Canyon Road intersection, if it is warranted based on existing traffic plus approved projects plus this project at the time of filing of the first final map. If the signal is not warranted, the applicant shall contribute its fair share towards the construction of the signal at a later date. D. Credit Toward South County Area of Benefit. The cost of construction of the off-site improvements listed in Condition 49.B. and 49.C. will be credited toward the fee payable to the South County subarea of the Countywide Area of Benefit which shall be calculated at $5276 per unit. E. Intent of Off-Site Conditions. The intent of these Conditions is to require the applicant to construct the improvements, or to pay a fair share toward their construction, identified in the Final Supplemental Environmental Impact Report as traffic mitigation measures along with the Norris Canyon Road sound barrier. F. Norris Canyon Road Frontage Dedication. Convey to the County, by Offer of Dedication, 42 feet of half-width right-of-way from the centerline of the alignment along the Subdivision 7578 frontage abutting Norris Canyon Road, plus any necessary slope easements along the frontage. G. Sight Distance Requirements. Provide for adequate sight distance at the project access intersection with Norris Canyon Road for a design speed of 35 miles per hour and all on-site intersections for a design speed of 25 miles per hour in accordance with CALTRANS standards. This applies to the intersection of "S" Drive and "A" Drive, "A" Loop intersection with itself and "A" Loop with "B" Drive. Site distance for remaining intersections shall be reviewed and approved at final development plan. Convey to the County a sight distance easement across those parcels which are crossed by the line of sight at all internal intersections. All garages which are accessed through a sight distance easement shall be set 21 back a minimum of 20 feet from the easement. The applicant should be aware that the sight distance easements could affect the buildability of some lots. H. Relinquishment of Abutter"s Rights. Relinquish abutter's rights of access along Norris Canyon Road with the exception of the two proposed access roads. I. On-Site Road Standards. On-site public roadways shall be constructed to public road standards with the following exceptions (exceptions from the Ordinance Code identified with a double asterisk (**) and provisions) . These standards shall include: providing for at least six off-street parking spaces for 66% of the units; providing adequate corner and stopping site distance for traffic safety; and, providing 30-foot curb return radii at all intersections where "No Parking" is required along an adjacent roadway leg. An exception is allowed from the County standards to begin the grading hinge point 5- feet behind the curb face and 3-feet behind the back sidewalk. The only private roadways in the project are depicted as such on the vesting tentative map. They shall be constructed to County private road standards with adequate parking, subject to review and approval by the Public Works Department. Private roads shall be constructed as at least 20-foot roads within 30-foot access easements. 1) General requirements: Provide for at least 6 off-street parking spaces for 66% of the units. Provide adequate corner and stopping sight distance for traffic safety. ** Exception from the County standards to begin the grading hinge point 5 feet behind the curb face and 3 feet behind the back of sidewalk. 2) "A" Drive Entry Road from Norris Canyon Road to "S" Drive: construct a 16-foot inbound lane and a 28- foot outbound roadway, within a 64-foot right-of- way. The outbound roadway shall consist of a 12- foot left-turn lane and a 16-foot right-turn lane. Special conditions: "No Parking". Additional width will be required for any raised median island. 3) "A" Drive Entry Road from "S" Drive to the "A" Drive Loop Road: construct a 28-foot road within a 48- foot right-of-way with no parking on either side. However, within Subdivision 7578 where units are located along the east side of the road, construct a 34-foot road within a 54-foot right-of-way with parking allowed along the east side of the road only. Special conditions: "No Parking" allowed at 28-foot road cross-section areas.Provide adequate off-street parking or parking bays subject to the Public Works Department, Road Engineering Division review, and review and approval of the Zoning Administrator.Provide circular driveways or hammerhead turnarounds at each of the driveways. ** Ordinance Code exception to allow a 10% maximum grade (8% required by the Ord. Code) without on- street parking. ** Ordinance Code exception to allow a reduction in road and right-of-way width from a 40/60 to a 28/48 22 without on-street parking and to a 34/54 with on- street parking along the east side of the road and with adequate corner and stopping sight distance. 4) "A" Drive Loop Road beginning 800 feet south of its intersection with itself around, clockwise, to its intersection with itself: construct a 32-foot road within a 52-foot right-of-way. Special conditions: "No Parking" allowed on the inside of the loop road. The maximum grade shall be 15% (Ord. Code) . Provide at least 6 off-street parking spaces for at least 50% of the units. ** Ordinance Code exception to allow a reduction in road and right-of-way width from a 36/56 to a 32/52 without parking on one side of the street and with adequate corner and stopping sight distance. 5) "A" Drive Loop Road from its intersection southerly to 800 feet south of its intersection with itself: construct a 40-foot road within a 60-foot right- of-way. Special conditions: Provide adequate off-street parking to allow on- street parking for the swim and tennis club y subject to review and approval of the Zoning Administrator. Parking allowed on both sides of road. 6) "B" Drive from Lot 321 to "C" Court: construct a 28-foot road within a 48-foot right-of-way. Special conditions: "No Parking" allowed except in adequate parking bays. Provide circular driveways or hammerhead turnarounds at each of the driveways. Realign "B" Drive between Lot 321 and 331 to eliminate small horizontal alignment undulations. ** Ordinance Code exception to allow a 20% grade (15% required by the Ord. Code) without on-street parking. ** Ordinance Code exception to allow a reduction in road and right-of-way width from a 36/56 to a 28/48 without on-street parking and with adequate corner and stopping sight distance. 7) "B" Drive from the "A" Drive Loop Road to Lot 321: construct a 32-foot road within a 52-foot right- of-way. Special conditions: "No Parking" allowed on the south side of the street, except in adequate parking bays. Provide circular driveways or hammerhead turnarounds at each of the driveways. 8) "K" Drive Entry Road throat area from the "A" Drive Loop to the "K" Drive Loop Road: construct a 36- foot road within a 56-foot right-of-way. Parking allowed on both sides. 9) "S" Drive: construct a 28-foot road within a 48- foot right-of-way. Special conditions: "No Parking" allowed. ** Ordinance Code exception to allow a reduction in road and right-of-way width from a 32/52 to a 28/48 without parking along one side of the street. 23 10) "T" Court North between the "T" Drive Entry Road and "S" Drive: construct a 32-foot road within a 52-foot right-of-way. Special conditions: "No Parking" allowed on one side of the street, except in adequate parking bays. 11) "T" Drive Entry Road from Norris Canyon Road to "T" Court North: construct a 32-foot road within a 52- foot right-of-way. Special conditions: "No Parking" allowed. 12) "B" Drive West of "C" Court; "C" Court; "D" Court; "E" Court; ''F" Court; "G" Court; "H" Court; "I" Court; "J" Court; "K" Drive Loop Road; "M" Court; "N" Court; "T" Court North, south of "S" Drive; and "T" Court South: construct a 28-foot minimum width road. Special conditions: "No Parking" allowed on one side of the street (the inside of the curve where feasible) , except in adequate parking bays. For "K" Drive Loop Road, "No Parking" on the inside of the loop. ** Ordinance Code exception to allow a reduction in road and right-of-way width from a 32/52 to a 28/48 without parking on one side of the street and adequate corner and stopping sight distance. J. Timing for Construction of Norris Canyon Road/"A" Drive Safety-Related Improvements. Install safety-related improvements at the intersection of Norris Canyon Road and "A" Drive (including traffic signs and channelization) as approved and at the time required by the Public Works Department (possibly prior to construction of any major public or private facilities and prior to issuance to building permits in these two subdivisions) . K. Location of No Parking Signs/Curbside Designations. Install "No Parking" signs and/or painted "No Parking" curb designations: 1) Along the west side of "A" Drive from "S" Drive to its intersection with itself. "No Parking" will be required on either side of the street along 28-foot road widths. Parking will be allowed on one side of the street along 32-foot road widths. 2) Along the inside of "A" Drive Loop except within 800 feet from the intersection of "A" Loop with itself in front of the swim and tennis club. 3) Along both sides of "B" Drive from lot 321 to "C" Court except in adequate parking bays (at least 7 feet wide) . 4) Along the south side of the curb between Lot 321 and the "A" Drive Loop Road. 5) Along both sides of "S" Drive. 6) Along one side of "T" Court North between the "T" Drive Entry Road and "S" Drive, except in adequate parking bays at least 7-feet wide. Along one side of all other roads greater than 24 feet in width and not noted otherwise in these Conditions. 7) Along both sides of the "T" Drive Entry Road. 24 8) Along one side of "B" Drive west of "C" Court, "C" Court, "D" Court, "E" Court, "F" Court, "G" Court, "H" Court "I" Court, "J" Court, "K" Drive Loop Road, "M" Court, "N" Court, "T" Court North south of "S" Drive, "T" Court South except in adequate parking bays at least 7-feet wide. "No Parking" shall be allowed on the inside of the "K" Drive Loop Road. 9) Special parking shall be provided along "A" Drive to accommodate parking for Wiedemann Hill trail users per Condition 27. L. Prevention of Storm Drainage Across Sidewalks and Driveways. Prevent storm drainage, originating on the property and conveyed in a concentrated manner, from draining across sidewalks and driveways. M. Omit. N. Proof of Right of Entry. Furnish proof to the Public Works Department, Engineering Services Division, of the acquisition of all necessary rights of entry, permits and/or easements for those improvements constructed with each phase. O. Acquisition of Off-Site Rights-of-Way and Easements. If, after good faith negotiations, the applicant is unable to acquire necessary rights-of-way and easements, he shall enter into an agreement with the County to complete the necessary improvements at such time as the County acquires the necessary interests in accordance with Section 66462 and 66462 . 5 of the Subdivision Map Act (the County must make a subsequent independent determination to exercise its condemnation authority) . P. Private Roads Maintenance Agreements. Establish maintenance agreements to insure future maintenance of the private roads/common driveways and the Emergency Vehicle Access within the subdivision boundaries. Q. Redesign of Entry Road. The entry road from Norris Canyon shall be redesigned from a split double entry to a single road conventional access to reduce visual impacts. R. Extension of "S" Drive. Extend "S" Drive to the westerly property line of Subdivision 7578 as a 52-foot right-of-way. No improvements are to be constructed at this time. S. Norris Canyon Road Maintenance and Repair Bond and Survey. The applicant shall post a bond to assure maintenance and repair of Norris Canyon Road during the construction period before it is improved in accordance with these Conditions of Approval. The amount of the bond shall be based on anticipated repairs, and a road condition survey taken prior to the initiation of any construction work, subject to the review of the Public Works Department, Road Engineering Division, and the review and approval of the Zoning Administrator. The road condition survey shall be based on a joint investigation by the Public Works Department and the developers representative. When warranted by a degradation in road condition, or when requested by the Zoning Administrator, a joint re-evaluation of the road condition shall be performed with recommended mitigations to bring the road up to at least its previous standard subject to the review of the Public Works Department, 25 Road Engineering Division, and the review and approval of the Zoning Administrator. T. Potential for Formation of New Area of Benefit. Certain improvements required by the Conditions of Approval for this development or the County Subdivision Ordinance Code may become eligible for credit or reimbursement against area of benefit fees, if an area of benefit is formed for construction of those improvements. The developer should contact the Public Works Department to determine what would be required to form an area of benefit and to personally determine the extent of any credit or reimbursement for which he might be eligible. The costs associated with the formation of the area of benefit would be an obligation of the applicant. Environmental Compliance 50. Update to Mitigation Monitoring Program; Mitigation Measures or Conditions of Approval. The applicant shall submit any modifications, updates or further details to the approved mitigation monitoring program for approval by the Zoning Administrator prior to final development plan approval. As an additional condition of approval, the applicant shall timely comply with all mitigation measures set forth in the Final Supplemental Environmental Impact Report or otherwise adopted by the Board of Supervisors. Development Agreement and Related Fees 51. Light Rail System Feasibility Study; Affordable Housing Trust Fund; Homeless Trust Fund; Timing for Payment. With the recordation of the first phased final map, the applicant shall contribute a lump sum equal to $25 per each of the 371 lots in the project to a non-profit trust fund to study the feasibility of a light rail system for Contra Costa County. With the recordation of each phased final map, the applicant shall contribute a pro rata amount equal to: 1) $3, 333 per each lot in that phase as an in-lieu contribution to a County- established affordable housing trust fund; and 2) per voluntary contribution by the applicant, an amount equal to that phase's pro rata share of a total of $150, 000 to the County-established homeless trust fund. Provided, however, all contributions shall be paid within five years from date of recordation of the first phased final map. Said contributions shall be deposited with the Community Development Department. Energy Efficiency 52 . Special Energy Efficiency Requirements. Homes shall be designed to meet energy efficiency standards of 10% more than the requirements of Title 24 of the California Code of Regulations currently in effect, unless otherwise approved by the Zoning Administrator as to glass efficiency standards to provide architectural design flexibility. In each garage, an electrical outlet shall be installed and dedicated for potential use in recharging electrical vehicles. Indemnification 53 . Indemnification of County by Applicant. Pursuant to Government Code Section 66474 . 9 , the applicant (including the subdivider or any agent thereof) shall defend, indemnify, and hold harmless the Contra Costa County Planning Agency and its agents, officers, and employees from any claim, action, or proceeding against the Agency (the County) or its agents, officers, or employees to attack, set aside, void, or annul, the Agency's approval concerning this subdivision map application, which action is brought within the time period 26 provided for in Section 66499. 37 . The County will promptly notify the subdivider of any such claim, action, or proceeding and cooperate fully in the defense. 27 ADVISORY NOTES A. The project lies within the 100-year flood boundary as designated on the Federal Emergency Management Association Flood Insurance Rate Maps. The applicant should be aware of the requirements of the Federal Flood Insurance Program and the County Flood Plain Management Ordinance (Ordinance No.. 87-65) as they pertain to future construction of any structures on this property. B. This project may be subject to the requirements of the Department of Fish & Game, P.O. Box 47 , Yountville, California 94599, of any proposed construction within this development that may affect any fish and wildlife resources, per the Fish & Game Code. C. This project may also be subject to the requirements of the U. S. Army Corps of Engineers. The applicant should notify the appropriate district of the Corps of Engineers to determine if a permit is required and if it can be obtained. D. The applicant will be required to comply with the requirements of the Bridge/Thoroughfare Fee Ordinance as adopted by the Board of Supervisors. E. Certain improvements required by the Conditions of Approval for this development or the County Subdivision Ordinance Code may be eligible for credit or reimbursement against said fee. The developer should contact the Public Works Department to personally determine the extent of any credit or reimbursement for which he might be eligible. F. The applicant shall be required to comply with all rules, regulations and procedures of the National Pollutant Discharge Elimination System (NPDES) as promulgated by the California State Water Resources Control Board, or any of its regional water quality control boards (San Francisco Bay Region II or Central Valley-Region V) . G. Comply with the requirements of the San Ramon Valley Fire Protection District. H. Comply with the development fee payment requirements of the San Ramon Valley Unified School District at time of issuance of building permits. . I. Comply with the requirements of the Health Services Department, Environmental Health Section (646-2521) . J. Comply with the requirements of the Construction Use of Recycled Water Ordinance (No. 91-24) . K. The applicant is advised that the tax for the police services district is currently set by the Board of Supervisors at $200 per parcel annually (with appropriate future Consumer Price Index [CPI] adjustments) . The annual fee is subject to modification by the Board of Supervisors in the future. The current fee for holding the election is $800 and is also subject to modification in the future. The applicable tax and fee amounts will be those established by the Board at the time of voting. L. LAFCO and the East Bay Municipal Utilities District (EBMUD) are advised that the Board of Supervisors, in approving this project and in petitioning LAFCO for the Norris Canyon Road Area Boundary Reorganization, with respect to the provision of water service to the project, has based its actions in part on the facts that the EBMUD represents the only available water supply for this area and the amount of water that will 28 i I I be used by this project and in the area of the boundary reorganization represents substantially less then one percent of overall current and projected water service demand in EBMUD. The Board's actions are further based on the fact that any apparent additional minor annexations to EBMUD will not cumulatively represent an appreciable percentage of future projected water demand in EBMUD. The Board also recognizes that the issue has yet to be resolved whether, prior to water service being provided by EBMUD to large areas designated for substantial new urban use that are outside EBMUD's boundaries, an increase in its water supplies may be required. Approval of this relatively small project should not be considered as a precedent, justification, or premature Board support for other boundary reorganizations that involve annexation to EBMUD, including such large areas designated for new substantial urban use. The growth management and service issues are fundamentally different. Such boundary reorganizations and projects, including their compliance with the County's growth management standards, must be considered on their own merits and facts without regard to the Board's actions here. M. The East Bay Regional Park District (EBRPD) is advised that in approving this project with its three agricultural lots, the Board of Supervisors has not required dedication of land but is allowing the opportunity for a gift of private land to EBRPD by the property owners as outlined in the agricultural lots map. In not requiring a dedication of land to the EBRPD and instead allowing an opportunity for a gift of land and otherwise for continued private ownership in combination with deed restrictions and scenic easements, the Board recognizes the unique circumstances of the property and its owners. The approach used here should not be considered an example or precedent for other projects in Contra Costa County. 11-23-92 29 �— ��.� •'`-tom^�` \ i : A"'/iJ� itll/ Illi,;! _-p-.c.:���y�.-'n �� ,':/' :lit` .. �._�_� fir' J' \\\ �. :. .k•...I :..-.—.....-�/'.`\ \L ''%%i" J�\' �';,:'. '` - -_o''; _ "'rte l _ '�.'�::. �'� �:\`J \\�� •t..: ,� ,` \\�i.i vi •;;:i ,;_ ,. 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Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Project Description/Location. . . . . . . . . . . . . . B. . Prior Environmental Review. . . . . . . . . . . . . . . . C. Determination to Utilize SEIR. . . . . . . . . . . . . D. Scope of SEIR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. Description of Record. . . . . . . . . . . . . . . . . . . . . F. General Considerations. . . . . . . . . . . . . . . . . . . . PART 2 . FINDINGS REQUIRED BY THE CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA) I. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Guide to the CEQA Findings. . . . . . . . . . . . . . . . B. Board Incorporation by Reference and Adoption of All Mitigation Measures and Findings Made by City of San Ramon in Resolution No. 89-188 . . . . . . . . . . . . . . . . . . C. Mitigation of Potentially Significant Impacts. . . . . . . . . . . . . . . . . . . . . . . D. Additional Impacts and Mitigation Measures. . . . . . . . . . . . . . . . . . . . . . . E. Significant Unavoidable or Irreversible Adverse Impacts. . . . . . . . . . . . . . F. Cumulative Impacts. . . . . . . . . . . . . . . . . . . . . . . . G. Significant Irreversible Changes. . . . . . . . . . . . H. Growth-Inducing Impacts. . . . . . . . . . . . . . . . . . . I. Relationship Between Short-Term Use and Long-Term Productivity. . . . . . . . . . . . J. Project Alternatives. . . . . . . . . . . . . . . . . . . . . . K. Statement of Overriding Considerations. . . . L. Consistency with the General Plan. . . . . . . . . i Exhibit F-1 BOARD OF SUPERVISORS COUNTY OF CONTRA COSTA FINDINGS RELATED TO CERTIFICATION OF SUPPLEMENTAL ENVIRONMENTAL IMPACT REPORT FOR WIEDEMANN RANCH RESIDENTIAL COMMUNITY PROJECT December 8, 1992 This Board of Supervisors (the "Board") of the County of Contra Costa, California (the "County") hereby adopts and makes the following resolutions and findings (the "Findings") relating to its approval of the Wiedemann Ranch Residential Community Project (the "Project") and certification of a supplemental environmental impact report (the "SEIR") and addendum prepared for the Board's consideration of the Project and the acceptance as adequate the complete environmental documentation for the Project, including the Westside Specific Plan Final EIR. PART 1 INTRODUCTION AND PROCEDURAL HISTORY I. Introduction To assist the reader in understanding the course of events leading to this Board's approval of the Project and certification of the SEIR, and in understanding the format and content of these Findings, set forth below is a brief history of the Project, prior environmental review, and the County's procedures leading to preparation of the SEIR and adoption of these Findings. A. Project Description/Location 1. Description The Project site consists of two parcels (subdivisions 7575 and 7578) , totaling 1, 143 . 5 acres. Subdivision 7575 encompasses approximately 1, 052 acres; Subdivision 7578 is approximately 91 acres. The current use of the Project area is for cattle grazing. The current zoning is Agricultural Preserve (A-4) . Consistent with such zoning, each parcel has a Williamson Act contract with the County. Notices of Nonrenewal for such contracts have been filed with the owners. The Project will allow development with 371 single-family residential lots and associated infrastructure. The Project includes a 8.8 acre community park with approximately 172 acres left as common open space. The remaining 673 acres will be preserved as privately-owned, deed restricted agricultural land and public open space. This 673 acres will be divided into three agricultural parcels (averaging approximately 200 acres each) with one "development site" within each parcel and Parcel "I" that is expected to be offered to the East Bay Regional Park District. The Project's residential development will consist of single- family lots of varying sizes. Each lot will be divided into three areas as follows: the "Building Areas" within which the construction of the primary residential structure and garages will take place; the "Controlled Development Areas" within which pools, gardens, fencing and other ancillary structures could be developed; and "Private Open Space Areas" within each lot where no development could take place. The Private Open Space Area within each lot will provide a buffer between residential development on the lots and deed restricted agricultural and open space on the rest of the property. 1 In February, 1991, the Project applicant filed applications with the County for rezoning, final development plan and subdivision applications for 371 units. Subsequently, the Project property owners filed petitions to cancel the existing Williamson Act contracts on the two Project properties. 2 . Location The Project is located approximately 2 . 5 miles to the southwest of downtown San Ramon along the south side of Norris Canyon Road. The Project is located within the unincorporated area of Contra Costa County and within the sphere of influence of San Ramon. 3. Discretionary Approvals The Project requires the following discretionary approvals by the County: rezoning from A-4 to Planned Unit District (P-1) ; Preliminary and Final Development Plan approval; Vesting Tentative Map; amendments to existing Wiedemann Ranch Development Agreements; cancellation of the Williamson Act contracts and related approvals. The Project also requires approvals from the Local Agency Formation Commission (LAFCO) for annexations. The Final Development Plan application has been withdrawn and will be subsequently processed. B. Prior Environmental Review Development of the Project area has been considered and evaluated the Program EIR on the Westside Specific Plan certified by the City of San Ramon in October, 1989 (the "WSP EIR") and relied on as part of the environmental documentation for this Project. The EIR on the Contra Costa County General Plan certified by this Board in January, 1991 (the "General Plan EIR") has been incorporated by reference into the FSEIR as an informational document only as allowed pursuant to the CEQA Guidelines. 1. Westside Specific Plan EIR The Project is located within the sphere of influence of the City of San Ramon. San Ramon's General Plan, adopted in November, 1986, contained general policies for the eventual development of the "Westside subarea", which includes the Project area, and designated such area for residential development. Policy 2 . 4H of San Ramon's General Plan required the preparation of a specific plan for undeveloped land prior to consideration of zoning proposals or development for the Westside subarea. The Specific Plan for Westside San Ramon (WSP) was adopted in November, 1989 . The WSP assessed future development in two subareas: (1) the Norris Canyon Road Area, which includes the Project area; and (2) the San Ramon Valley Boulevard Area, which includes property adjacent to San Ramon Valley Boulevard and Interstate 680. The WSP EIR was prepared, adopted, and certified as the environmental review document for the WSP. The WSP EIR specifically analyzed environmental impacts and set forth mitigation measures for development of a residential project consisting of approximately 450 homes in the Project area. 2 . General Plan EIR In January, 1991, the Board adopted the Contra Costa County General Plan 1990-2005 (the "County General Plan") . The County General Plan designated the Project site for Single Family Residential - Low Density, and Agricultural lands. Concurrently, the Board certified the General Plan EIR. The General Plan EIR specifically references the WSP EIR, and further considers and assesses residential development of the Project area. The General Plan EIR assumed development of 528 units on the Project site in its analysis of potential impacts, including cumulative impacts and growth inducing impacts. 2 C. Determination to Utilize SEIR The Project applications were submitted in February, 1991. The Project as proposed by the applicant was designed to accumulate most of the applicable mitigation measures and design criteria set forth in the WSP EIR. The Project was designed to reduce impacts at least to the extent envisioned in the WSP EIR, if not more so. The California Environmental Quality Act (CEQA) Guidelines at §15162 require that where an EIR has previously been prepared, additional environmental review is necessary where changes are proposed in the project, changes in circumstances have occurred, or new information becomes available showing significant impacts. (§15162 (a) (1) - (3) ) The County prepared an Initial Study to determine the extent of further environmental review required for the Project. The Initial Study was thus drafted to determine if new significant impacts, (i.e. , impacts not previously studied and addressed in the WSP EIR) would result from the Project. The County staff determined that preparation of a supplemental EIR (SEIR) was appropriate, pursuant to CEQA at Public Resource Code (PRC) §21166, and pursuant to CEQA Guidelines at §15163 . Consistent with such statute and Guidelines, staff determined that only minor additions or changes would be necessary to make the previous environmental document (WSP EIR) adequately apply to the Project, and that the SEIR would be prepared. On December 13 , 1991, County staff issued a Notice of Preparation for the SEIR. The Notice of Preparation outlined the scope of the SEIR, and attached an Expanded Initial Study of Environmental Issues (the "Expanded Initial Study") for the Project. Staff, through its Expanded Initial study and responses to comments based thereon, identified three (3) issues which were not fully discussed and addressed in the WSP EIR, and which could give rise to new potentially significant impacts. The three issues are as follows: Land Use - The WSP EIR did not evaluate the Project's consistency with the goals, policies and development guidelines of the later-adopted (County) General Plan. The SEIR thus evaluates the Project's consistency with the policies of all General Plan Elements. . Aesthetics - As part of the Project approval process, the applicant submitted a new comprehensive viewshed analysis. The SEIR provides further environmental review of such new information. Traffic - As part of the Project approval process, the applicant submitted a traffic analysis prepared in accordance with the provisions of the Contra Costa County's Transportation Authority Growth Management Program (Measure C) , and the City of San Ramon's Ordinance 164 , Guidelines for Implementation of the Traffic and Circulation Element of the General Plan. These documents were not adopted until after adoption of the WSP EIR, necessitating further review in the SEIR. D. Scope of SEIR The Expanded Initial Study confirmed that the County would be the Lead Agency and would utilize the WSP EIR as the Program EIR, which when combined with the SEIR will provide the environmental documentation required by CEQA. 3 1. Categories Which Contain Potentially Significant Impacts As stated, staff determined that potentially significant impacts notaddressed in the WSP EIR fall within three areas: Land Use, Aesthetics, and Traffic (traffic was added after preparation of the draft SEIR was underway) . Thus, in the SEIR, full environmental review is accorded for these areas, i.e. , all potentially significant impacts with regard to the Project are identified, and mitigation measures required to reduce such impacts to insignificant levels are identified. 2. Issues Previously Addressed/New Mitigation Measures The Expanded Initial Study also identified certain Project impacts that staff felt warranted further discussion in the SEIR. These impacts are within the following categories: Animal life; Drainage; Plant Life; Noise; Fire Hazard/Emergency Access; Earth/Geology; and Water. The Expanded Initial Study confirmed that impacts in the above categories were previously, fully addressed in the WSP EIR, and mitigated to insignificant levels pursuant to mitigation measures listed in the WSP EIR. Staff decided that, although CEQA does not require that such Project impacts be addressed in the SEIR, the public would be better informed if discussion of such impacts were included in the SEIR. Staff further noted that the Project adopts mitigation measures beyond those required by the WSP EIR; thus discussion of these impacts enables identification and adoption of such further mitigation measures. E. Scope of These Findings CEQA Guidelines at 15091 require that a project's significant environmental impacts identified in an EIR must be addressed by one of three findings, as set forth at 15091 (a) - (c) . The EIR in this matter consists of the WSP EIR and the SEIR. To ensure that all Project impacts are identified, and necessary Findings made, these Findings will: (1) list the Project impacts and mitigation measures identified in the WSP EIR, and set forth the corresponding required Findings; and (2) list the Project impacts and mitigation measures identified in the SEIR, and set forth the corresponding required Findings. The SEIR mitigation measures have been modified by the Board in some instances to more accurately reflect specific conditions or changes in project design. In each instance the revised mitigation measure provides the same or better mitigation and substantially mitigates any significant environmental impacts. F. Description of the Record For the purposes of CEQA and these Findings, the record before this Board relating to the Project includes, without limitation, the following: 1. The County General Plan, and the General Plan EIR; 2 . The San Ramon General Plan, the Westside Specific Plan, and the WSP EIR; 3 . The FSEIR; 4 . All documents submitted as part of the Project application, and all studies, reports, and materials accompanying or referenced in such application; and 4 5. All documentary and oral . evidence received and reviewed, including at public hearings, relating to the Project, and to the adoption of the SEIR, the County General Plan and zoning ordinances, the General Plan EIR, the San Ramon General Plan, the Westside Specific Plan, the WSP EIR, the Alameda County General Plan and zoning ordinances, the West Dublin Specific Plan, and all related documents, including the list of documents included here as Attachment 1. G. General Considerations 1. Reliance on the Record. Each and all of the findings and determinations contained herein are based upon. the competent and substantial evidence, both oral and written, contained in the entire record relating to the Project. The findings and determinations constitute the independent findings and determinations of this Board in all respects and are supported by substantial evidence in the record as a whole. 2. Nature of Findings. Any finding made by this Board shall be deemed made regardless of where it appears in this document. All of the language included in this document constitutes Findings by this Board, whether or not any particular sentence or clause includes a statement to that effect. This Board intends that these Findings be considered as an integrated whole and, whether or not any part of these Findings fails to cross- reference or incorporate by reference any other part of these Findings, that any Finding required or permitted to be made by this Board with respect to any particular subject matter of the Project shall be deemed made it is appears in any portion of these Findings. 3. Limitations. The Board's analysis and evaluation of the Project is based on the best information currently available. 4. summaries of Facts, Impacts, Mitigation Measures, Alternatives, and Other Matters. All summaries of information related to the Project are based on the referenced environmental documents and/or other evidence in the record. The absence of any particular fact from any such summary is not an indication that a particular Finding is not based in part on that fact. Moreover, the summaries set forth below, including, without limitation, summaries of impacts, mitigation measures and alternatives, are only summaries. This document includes only as much detail as may be necessary to show the basis for the findings set forth below. Cross-references to the WSP EIR, the SEIR, the WSP, and the County General Plan have been made where helpful, and the reader should refer directly to those documents, the other referenced documents, and other evidence in the record for more precise information regarding the facts on which the summary is based. S. Adoption of Mitigation Measures. These Findings are based upon the numerous mitigation measures to be required in the Project as recommended by the WSP EIR/SEIR as modified by the Board, or as already having been incorporated into the Project. This Board is hereby adopting and incorporating into the Project those mitigation measures recommended in the WSP EIR/SEIR as modified which have not already been incorporated into the Project (with the exception of those mitigation measures that are rejected by the Board or found to be within the responsibility of another agency as more fully set forth below) . This Board finds that all of the mitigation measures now or previously incorporated into the Project are desirable and feasible and shall be implemented in connection with the Project in accordance with the adopted mitigation monitoring program. 5 6. Specific and General Mitigation. The WSP EIR and SEIR generally identify, for each potentially significant impact of the Project, one or more corresponding mitigation measures to lessen or avoid such impact. For ease of reference to those documents, this document is organized in a similar manner. However, this Board recognizes that many ofthe mitigation measures described below or in the WSP EIR/SEIR as modified may lessen or avoid identified impacts other than those for which they are specifically proposed. In light of the above, this Board finds that (a) each mitigation measure adopted by this Board or already incorporated into the Project may avoid or substantially lessen potentially significant impacts other than the impact to which such mitigation measure is corresponded in the WSP EIR/SEIR or below and (b) each significant impact identified by the WSP EIR/SEIR is mitigated both by its corresponding mitigation measures to the extent set forth in such documents or below ("Specific Mitigation") and by other, non- corresponding mitigation measures adopted by this Board or already incorporated into the Project ("General Mitigation") . These Findings shall be applicable wherever supported by the evidence in the record regardless of whether a specific finding of an instance of such General Mitigation is made. However, the Findings of Specific Mitigation made below are independent of, and in no way depend on, the existence of any instance of General Mitigation except to the extent that a court may find any Finding of Specific Mitigation to be inadequate or unsupported by the evidence in the record. PART 2 FINDINGS REQUIRED BY THE CALIFORNIA ENVIRONMENTAL OUALITY ACT (CEOA) I. Introduction These findings (Findings) are made pursuant to the requirements of the California Environmental Quality Act (CEQA) , as set forth at Cal. Pub. Res. Code §21000 et see . A. Guide to the CEQA Findings These CEQA Findings (Part 2 of this document) are set forth in Sections A - R, as follows: Section A consists of this Guide to the CEQA Findings. Section B consists of the Boards incorporation by reference and adoption of all mitigation measures and findings made by the City of San Ramon as part of its certification of the WSP EIR in Resolution No. 89-188 . Section C consists of identification of potentially significant impacts in the areas of Land Use, Aesthetics, and Traffic. These potentially significant impacts were not fully discussed and addressed in the WSP EIR, and are thus addressed in the SEIR. With regard to each identified potentially significant impact in Section C, the following format is followed: First, mitigation measures are identified and proposed to lessen or avoid those impacts, including those mitigation measures which have already been incorporated into the Project; second, facts are set forth which explain use of the mitigation measures to reduce the identified impacts and otherwise justify the ultimate finding made and; third, with respect to each identified impact, one of the three findings required by CEQA Guidelines (§15091 (a) (1) -(3) ) is made. 6 Section D consists of a discussion of further issues and impacts which are raised by the Project. Staff determined that these impacts were identified, addressed, and mitigated by measures set forth in the WSP EIR. With regard to these issues/impacts, the Expanded Initial Study and the SEIR do not raise additional significant impacts. However, the SEIR does raise additional mitigation measures beyond those identified in the WSP EIR which will further mitigate the impacts. To facilitate identification and discussion of these new mitigation measures, and to ensure. that all impacts have been identified, the same format as referenced for Section C will be followed. With regard to both Sections C and D, above, the impacts and mitigation measures set forth in the WSP EIR are set forth first, with appropriate, corresponding Findings by the County Board pursuant to CEQA Guideline §15091. Section E sets forth Findings with regard to the Project's significant unavoidable or irreversible adverse impacts. These impacts are discussed in the SEIR at p. 3-87 . Section F sets forth Findings with regard to the Project's cumulative impacts. These impacts are discussed in the SEIR at p. 3-88 . Section G sets forth Findings with regard to the Project's significant irreversible changes. These impacts are discussed in the SEIR at p. 3-88 . Section H sets forth Findings with regard to the Project's growth inducing impacts. These impacts are discussed in the SEIR at p. 3-89. Section I sets forth Findings with regard to the relationship between short-term uses and long-term productivity. These issues are discussed in the SEIR at p. 3-94 . Section J sets forth Findings with regard to the Project alternatives. These alternatives are set forth in the SEIR at p. 4- 1. Section K sets forth the Statement of Overriding Considerations. The Board has adopted this Statement even though no unavoidable significant impacts remain and therefore it is unnecessary under CEQA. This statement has been adopted in the event it is determined subsequently that one was required. Section L addresses the Project's consistency with the Contra Costa County General Plan. B. Board Incorporation by Reference and Adoption of Mitigation Measures and Findings Made By City of San Ramon in Resolution No. 89-188 The WSP EIR includes discussion of the impacts of a residential project in the Project area. The WSP EIR specifically lists impacts which relate to the Project, and mitigation measures, regarding such impacts and mitigation measures. The City of San Ramon set forth such impacts and mitigation measures, and made specific findings thereon, in its Resolution No. 89-188 , adopted on October 24 , 1989. This Board hereby: (1) incorporates by reference such Resolution; (2) adopts as its own such Resolution in its entirety; and 7 (3) specifically adopts as its own all mitigation measures and findings made by the City of San Ramon in such Resolution, except as may be modified or amended in these Findings to reflect the fact hat the Board is considering this Project only,not the WSP, including the Findings that for this Project all unavoidable impacts have been mitigated to a level of insignificance. The Expanded Initial Study set forth three findings to be made with regard to project approval and utilization of the WSP EIR/SEIR. Consistent with the history and procedures set forth above, and with the remaining Findings set forth in this Part 2 , the Board hereby makes the following three Findings: (1) The 1989 WSP EIR has been prepared and certified as adequate by the City of San Ramon, is adequate under CEQA, including PRC §21166 and Guideline 515163 , and is being relied on by the County decision making bodies as the new Lead Agency to consider this Project; (2) The SEIR, including its responses to comments, is complete and adequate under CEQA, including PRC §21166 and Guidelines §§15163 , 15090 and 15091; and (3) The only impacts requiring environmental review in a supplemental environmental document under Guidelines §15163 are identified and discussed in the SEIR. C. Mitigation of Potentially Significant Impacts Land Use Land Use Impacts/Mitigation Measures Identified in the WSP EIR 1. WSP Impact: The City of San Ramon General Plan requires that slopes over 20 percent be dedicated as Open Space, while the Specific Plan allows limited development on slopes up to 30 percent. This General Plan policy is implemented by the RCOD ordinance. a. WSP EIR Mitigation: 4 . 1-2 : Grant variances as needed from RCOD 4 . 1-2 Revise the WSP b. - Facts: The San Ramon General Plan allows grading to create building sites of less than 20 percent, provided that: creeks are retained; wooded slopes visible from San Ramon Valley Boulevard are retained; graded land forms are natural; and all woodland is replaced at a 1. 5 to 1 ration. The WSP policies are consistent with these provisions, and the Project is based upon the Specific Plan criteria and satisfies these provisions. The WSP, and the Project, includes features which will avoid or substantially lessen the effects identified in the WSP EIR. The Project minimizes grading in the creation of building sites. Wherever possible, natural contours are to be retained vs. a "padded" development. The majority of existing waterways are respected to preserve tree cover and riparian corridors. Significant ridgelines are preserved and protected from development. Graded areas will be contoured to match adjacent undisturbed areas. Woodlands are proposed to be replaced at a 3 : 1 ratio (net 5 year survival rate assured) . See also condition 17 . 8 The Project is within the County jurisdiction. The San Ramon does not have jurisdiction and 'neither its General Plan with the Save Our Hills provisions nor the San Ramon RCOD applies to this site. This Project is inconsistent with the new San Ramon General Plan. The development of this Project, or anything comparable to it, would not be possible if compliance with San Ramon's General Plan were required, even though it is consistent with the County's General Plan. C. Findings: The Project need not be consistent with the San Ramon General Plan nor the RCOD. Further, Project validity does not depend on consistency of the WSP with the San Ramon General Plan. The Project is a sensitive hillside development that incorporates the presentation of substantial open space, That the Project does not comply with the San Ramon General Plan is not a significant impact that must be mitigated. 2 . WSP Impact: Proposed development under the Specific Plan would be inconsistent with the Contra Costa County General Plan. a. WSP EIR Mitigation: Upon annexation, the land will be subject to San Ramon Policies. No mitigation necessary b. Facts: The County General Plan was adopted on January 29, 1991, after the adoption of the WSP. The County General Plan reflects the proposed project site as Single Family Residential. The Project will be approved under County jurisdiction, and may never by annexed into the City of San Ramon. The Project is consistent with the General Plan. c. Findings: As shown below, the Project is consistent with the County General Plan. The impact is insignificant and no mitigation is required. 3. WSP Impact: Development consistent with the Specific Plan would not be consistent with the agricultural zoning districts currently applied to the Westside. a. WSP EIR Mitigation: 4 . 1-4 : Rezone the area consistent with Specific Plan policies. b. Facts: The City of San Ramon rezoned the plan area on November 14 , 1989, consistent with the WSP. The Project includes rezoning from A-4 to P-1. C. Findings: The Project is consistent with the WSP zoning districts; although it need not be because it is being approved by the County. The Project is consistent with the County zoning districts as approved herein. The impact is insignificant and no mitigation is required. 4. WSP Impact: Proposed development under the Specific Plan would in some areas not be in conformance with the Resource Conservation Overlay District (RCOD) . a. WSP EIR Mitigation: 4 . 1-5 Grant variances as needed. 9 4 . 1-6 Revise the Specific Plan to eliminate development in violation of RCOD. b. Facts: The RCOD is discussed below as one of the Project Alternatives. This is essentially the Save Our Hills Initiative, alternative and avoidance alternative, too. See Facts set forth under WSP Impact 1, above. C. Findings: The Project is not consistent with the RCOD criteria, although it need not be for purposes of approval by the County because it is not under the jurisdiction of the RCOD. As a County project, the impact is not significant and need not be mitigated. Land Use ImpactsLMitigation Measures Identified in the SEIR The SEIR sets forth impacts of the Project with regard to Land Use issues, and corresponding mitigation measures, at pp. 2-1 to 2-20. 5. Impact: The proposed project would result in the conversion of approximately 280 acres of the 1, 145 acre project from agricultural use to low density, large lot single-family residential uses (i.e. , lots, roads, infrastructure) . a. Mitigation: (1) Measures Incorporated into the Project The Project as proposed and approved provides for the great majority of lands to be preserved in perpetuity as open space. (2) Additional Mitigation Measures No additional mitigation measures are necessary. b. Facts: The County General Plan designates the Project area as single-family residential, low density. The County General Plan provides the opportunity for development of approximately 528 units in the Project area. Contra Costa County voters on November 6, 1990 adopted the 65/35 Contra Costa County Land Preservation Plan ("Measure C - 1990") . The 64/35 Land Preservation Plan requires that urban development in the County shall be limited to no more than 35% of the land in the County. At least 65% of all land must be preserved for agriculture, open space, wetlands, parks and other non- urban uses. To ensure enforcement of the 65/35 standard, and provide for managed growth, the County established an Urban Limit Line (ULL) , which is incorporated into the County's General Plan. The ULL establishes those areas within which urban development would be allowed, subject to the goals, policies and implementation measures of the County General Plan. No urban development can be designated beyond the ULL. The Project is consistent with these General Plan standards. First, the development area of the Project property is wholly within the ULL. Second, the limited area proposed for development (288 acres) constitutes . Olio of the remaining 23 , 982 acres in the County that may be developed and still maintain the 65/35 County- wide standard (see Table 3-3 on page 3-18 of the County General Plan) . Third, the Project has been planned to reinforce the open space goals inherent in these standards. Development of the Project will permanently restrict the greater portion of the property to permanent open space use. Of the 1, 143 acres of Project property, 10 approximately 854 acres or 75% will be permanently restricted to agriculture and open space use. With regard to such 854 acres, parks and common open space of the project comprise 181 acres, of which 172 acres would be common open space within the project. The remaining 681 acres will be privately-owned and deed restricted to agricultural/open space uses. Cattle grazing will continue on the 673 acres of open space. Further, of the Project's 511 acres located within the ULL, 231 acres will remain as open space. Thus, within the ULL, 45% of the Project site is designated for open space. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts relating to conversion of lands from agricultural use to residential use have been avoided or substantially lessened by the Project as approved. The great majority of Project property will be kept as open space. The Project as approved will have no significant impact relating to such conversion. The Project is consistent with the County General Plan designation of the Project area as single- family residential, and with the County General Plan ULL. No additional mitigation measures are necessary with regard to conversion of the Project area lands to residential use to reduce the impact to a level of insignificance. (2) Remaining Impacts There are no feasible measures to mitigate this impact any further, and to the extent required by law, the Board finds that the environmental, economic, social, and other benefits of the Project override any remaining impacts relating to conversion of 288 acres to residential use, as more fully stated in the Statement of Overriding Considerations, below. 6. Impact: The proposed residences would be located adjacent to agricultural uses which would result in land use compatibility impacts. a. Mitigation• (1) Measures Incorporated into the Project Measures have been incorporated into the Project which avoid any insignificant impacts from residences constructed adjacent to agricultural uses. The Project has been designed to include buffer areas between the proposed residential uses and the existing agricultural and open space uses. Each lot will include private open space ares within which no development would be allowed. See also Williamson Act Findings, Exhibit H. (2) Additional Mitigation Measures No additional mitigation measures are necessary. 11 b. Facts: The Project has been designed to include buffer areas between the proposed residential uses and the existing agricultural and open space uses. These buffers would include a fifty foot wide band around the perimeter of the development area within which no development or agricultural uses would be allowed. This buffer also provides a fire break. In addition to the outer buffer, each lot within the proposed project will be divided into three separate areas: (i) the Building Area within which the primary structure should be built; (ii) the Controlled Development Area within which ancillary structures (i.e. , pools, sheds, gardens) could be built; and (3) the Private Open Space Area within which development would not be allowed. The provision of these buffers would significantly reduce the potential land use conflicts associated with Project development. An agricultural use disclosure statement will be recorded on each new lot and informational booklets will be distributed to new buyers to make sure buyers are informed of and prepared for these agricultural uses. The proposed development would be in the vicinity of the existing communication facilities atop Wiedemann . Hill. However, the closest residential lot would be more than 1, 000 feet from the communication facilities, and approximately 400 vertical feet lower than the facilities. C. Findings: Based upon the Final EIR and the entire record before this Board, this Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts relating to compatibility of the residential development with adjacent agricultural uses and communication facilities have been avoided or substantially lessened by the Project as approved. The Projects design, which includes individual lot open space, and creation of buffer areas, reduces any impacts to insignificant levels. No additional mitigation measures are necessary. (2) Remaining Impacts See Section C. 5.b (2) on page 11. 7. Impact: The Project would require rezoning of the Project site from the current A-4 zoning to P-1. a. Mitigation: (1) Mitigation Measures Incorporated into the Project The Project as approved provides for rezoning to P- 1 for 482 acres, while leaving the vast majority of the property as open space. (2) Additional Mitigation Measures No additional mitigation measures are necessary. b. Facts: The County General Plan land use designation for the site is single-family residential, low density (SL) . Rezoning the developed area of the site to P-1 will allow such area to become consistent with the County General Plan. 12 C. Findings: Based upon the Final EIR and the entire record before this Board, this Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts from rezoning only 482 acres of Project property to P-1, while retaining 661 acres in open space, have been avoided or substantially lessened by the Project as approved. The rezoning to P-1 is consistent with the County General Plan. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. 8. Impact: The Project should be generally consistent with the policies of the County General Plan Elements; specifically the Land Use Element and the Housing Element. a. Mitigation: (1) Measures Incorporated into the Project No additional mitigation measures are necessary with regard to the Land Use and Housing Elements. (2) Additional Mitigation Measures The Project's consistency with other General Plan Elements are discussed under other, corresponding sections of these Findings. (See discussion under Facts, below. ) b. Facts: The County General Plan contains nine "Elements" as generally required by state law. The two County General Plan Elements addressed under this (Land Use) Section are the Land Use Element and the Housing Element. (1) Land Use: The land use designation for the proposed development area is for single-family low density residential (SL) uses. The proposed project is for single-family low density and open space. The County's Land Use Policies most applicable to new development on the Project site are: (i) the provision of adequate public services and utilities (Growth Management Standards) (Policies 3-5, 3-6) ; (ii) whether or not the new development is within the - Urban Limit Line (Policy 3-11) ; and (iii) providing adequate buffers and/or preservation of prime agricultural land Policies 3-11, 3-12) (see County General Plan at pp. 3-44 , 3-45) . Discussion of adequate public services and utilities in relationship to the County's Growth Management Standards is set forth in the SEIR at Chapter 3 .2 and discussed in these Findings at under Section D, below. Discussion of the Project's consistency with the County General Plan ULL is set forth in this Land Use Section at Impact 5, above. Discussion of adequate buffers is set forth in this Land Use Section at Impact 6, above. Discussion of preservation of prime agricultural land is set forth in the SEIR at Chapter 3 . 5 and discussed in these Findings under Section D, below. (2) Housing Element: The Project is generally consistent with the County's Housing Element because 13 the Project is . generally consistent with the County's General Plan Land Use Map which designates the site as SL - Single-Family Low Density. However, the Project would result in the development of fewer homes on the site than envisioned in the Housing Element (371 proposed vs. 528 estimated units in the Housing Element for this site and the adjoining Freitas site) . This loss of future housing opportunity would not be considered a significant impact because the County has significant amounts of vacant land designated for development of single family low density housing. In addition, the Project would contribute an "in lieu" affordable housing fee of $3 , 333 per approved residential home. Base on 371 units this fee would generate approximately $1, 236, 000 for use by the County in developing additional affordable housing. C. Findings: Based upon the Final EIR and the entire record before the Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project is consistent with the County General Plan and with Land Use and Housing Elements set forth therein. The Project impacts relating to any inconsistency with the County General Plan, including without limitation its Elements, policies, and goals, have been avoided or substantially lessened by the Project as approved. (a) Land Use: The Project is consistent with the County's Land Use Element. The Project is consistent with the County's land use designation for the site. The Project is consistent with the County's 65/35 Land Preservation Plan because the development site is entirely within the County Urban Limit Line. The Project is consistent with County goals and policies regarding open space. The Project will permanently restrict approximately 854 acres of the 1, 143 site (75%) to open space, park and agricultural uses. Further, a buffer will be provided around the development area between the residential development and agricultural land. The Project site is not considered prime agricultural land. (b) Housing Element: The Project is consistent with the County General Plan's Housing Element. The Project is consistent with the County General Plan's Land Use Map. (2) Remaining Impacts No additional mitigation measures are necessary to reduce this impact to a level of insignificance. See Section C. 5.b. (2) on page 11. Aesthetics Aesthetics . Impacts/Mitigation Measures Identified in the WSP EIR 9. WSP Impact: The Westside will be the first major hillside to be developed on the west side of the freeway in San Ramon, and may have significant visual impacts on San Ramon Valley Boulevard, Norris Canyon Road, and open spaces such as the Bishop Ranch Regional Open Space, resulting from the grading of steep hillsides and the sitting and construction of roads 14 and storage tanks, as well as residential and commercial activities. This is a potentially significant impact. a. WSP EIR Mitigation: The WSP and the WSP EIR set forth guidelines and standards which would mitigate potential visual impacts of development in the Norris Canyon Area. These guidelines are set forth in such documents as 4 .4-1 through 4 .4-10 (see summary in Appendix C of SEIR, at pp. l-2) . b. Facts: The City of San Ramon found the impacts may not be substantially mitigated with a project utilizing these guidelines and standards. The City further adopted a statement of overriding considerations to the effect that the need for housing near growing regional employment centers outweighs this potentially significant impact. The Project has incorporated the guidelines and standards set forth at 4 .4-1 through 4 .4-10 and provided for more detailed project design and guidelines to reduce visual impacts even further. As part of the SEIR process, a visual analysis of the Project was submitted by Computer Applications for Design Professionals (CAPD) . An analysis of this detail and sophistication was not done in the WSP EIR. The SEIR utilized this analysis and set forth four additional mitigation measures for the Project (see discussion and Findings under Aesthetics Impact 1 identified in the SEIR, below) . C. Findings: The Project has generally incorporated the guidelines and standards set forth at 4 . 4-1 through 4 . 4-10. The Board has further adopted four additional mitigation measures set forth under Aesthetics Impact 1 set forth below. With these mitigation measures, the Project design and its Conditions of Approval the impact is avoided or substantially lessened. 10. WSP Impact: Development in the cross-valley ridge and adjacent "backside" of a major ridge could have a visual effect. No further mitigation is necessary to reduce this impact to a level of insignificance. See also Findings for Impact 14 . , below, incorporated herein by reference. a. WSP EIR Mitigation: The WSP and the WSP EIR set forth mitigation criteria at 4 .4-11 to address this impact (see Appendix C at p. 3) . b. Facts: The Specific Plan incorporates the above mitigation criteria as guidelines, which will reduce potential visual impacts from development on the cross- valley ridge and adjacent "backside" of a major ridge. The City found that use of such criteria partially mitigated the impact; the City further adopted a statement of overriding considerations. The Project incorporates the criteria found in 4 .4-11 by following such standards wherever appropriate on the Project. The SEIR further proposes additional mitigation measures with regard to architectural review to reduce impacts of visibility from cross-valley ridge development (see SEIR Impacts Aesthetics Impact 3 , below) . These mitigation 15 measures have further been incorporated into the Project. The Project has been redesigned and additional conditions imposed to further mitigate this impact. For reasons set forth under SEIR Impacts Aesthetics Impact 3 , the subject impacts have been avoided or substantially lessened. No further mitigation is necessary to reduce this impact to a level of insignificance. See also Findings for Impact 14 below, incorporated herein by reference. C. Findings• The Project has incorporated the criteria set forth at 4 .4-11, and the mitigation measures set forth under SEIR Impacts Aesthetics Impact 3 , below. For reasons . set forth under SEIR Impacts Aesthetics Impact 3 , the subject impacts have been avoided or substantially lessened. No further mitigation is necessary to reduce this impact to a level of insignificance. See also Findings for Impact 14 below, incorporated herein by reference. 11. WSP Impact: Development in upland areas adjacent to stream corridors, on steep slopes, or where complicated cross slopes exist could result in visual impacts. a. WSP EIR Mitigation: The WSP and WSP EIR set forth mitigation measures at 4 .4- 13 through 4 .4-16 (see Appendix C, p. 4) b. Facts• The Specific Plan incorporates the above mitigation as guidelines for development. The City Council found this impact partially mitigated, and further adopted a statement of overriding consideration. The Project includes these mitigation measures in its basic design. The Project substantially avoids development in upland areas adjacent to stream corridors, or where cross slopes exist. With regard to development on steep slopes, see SEIR Impacts Aesthetics Impact 6, below. C. Findings: The Project has incorporated the referenced mitigation measure in its basic design. The Project avoids visual impact associated with development areas adjacent to stream corridors and where cross slopes by reducing development in those areas. Development on slopes over 26% is minimized and performed sensitively as set forth in SEIR Impacts Aesthetics Impact 6, below. The impacts thus have been avoided or substantially reduced. No further mitigation is necessary to reduce this impact to a level of insignificance. See also Findings for Impact 14 below, incorporated herein by reference. 12. WSP Impact: Norris Canyon Road is a scenic rural road, and designated as such in adjacent Alameda County The Westside Specific Plan calls for widening of the street. . .this widening may result in significant impacts on the narrow canyon, and in terms of its character as a rural road. a. WSP EIR Mitigation: The WSP and WSP EIR provide for mitigation measures 4 .4-17 through 4 . 4-19 (see Appendix C of the SEIR at p.4) . 16 i I b. Facts: The findings for the WSP EIR found the visual impact of widening Norris Canyon Road to 32 feet to be "not fully mitigated". The City of San Ramon adopted a statement of overriding consideration stating that the benefits of improving driver comfort and safety along Norris Canyon Road substantially outweigh the impact identified in the WSP EIR. The proposed improvements for Norris Canyon Road to increase the total pavement width to 34' will have the significant beneficial effect of improving the driving ease and safety of the existing rural road. At the same time, Norris Canyon Road will not lose its rural character because road improvements are restricted by the existing underlying R.O.W. Potential improvements are also restricted by the location of San Catanio Creek along some portions of the south side of the existing j road and steep slope banks along some portions of the north side of the existing road. The Project submittals contain roadway sections that detail how the potential widening adheres to the development concept for Norris Canyon Road as reviewed in the WSP EIR. These submittals confirm that impacts on the roadway area will be minor. , The updated Traffic Study prepared by Korve Engineering verifies that potential improvements to Norris Canyon Road are base primarily on driver convenience and not capacity limitations of the current two lane road. However, the Public Work Department has determined that at least some capacity improvements are required. The cost of road improvements to Norris Canyon Road will be borne by the applicant because sufficient funding is not likely available elsewhere and even though its improvement at this time is not required by the County's growth management standards. C. Findings• The impacts on the canyon and effect on the rural character of Norris Canyon Road are avoided or substantially lessened. Mitigation measures 4 .4-17 through 4 . 4-19 have been incorporated into the basic design of the improvements, which can be addressed on a individualized basis at the time of final development plan approval to substantially mitigate environmental and aesthetics effects of those road improvements. The conditional improvements can be constructed in a manner that will improve road safety and still retain a rural character of the road and without adversely impacting the roadway canyon area. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. See Also Section C. 5.b. (2) on page 11, incorporated herein by reference. 13. WSP Impact: Although no water tanks may be needed for the San Ramon Valley Boulevard area, it is likely that three new water tanks may be required to serve development in the Norris Canyon Road area. These tanks could be visible from Norris Canyon and other vantage points in the project vicinity. a. WSP EIR Mitigation: The WSP and WSP EIR set forth mitigation measures for tank visibility impacts as 4 . 4-20 through 4 .4-22 . (See SEIR at Appendix C, pp. 4-5) b. . Facts: The WSP contains policies to assure proper sitting, landscaping and color palettes to mitigate any 17 potential impacts. The Project adheres to these policies, and thereby substantially incorporates this mitigation. The San Ramon City Council adopted a statement of overriding considerations, confirming that the benefits of providing a reliable water supply for development along Norris Canyon Road outweighs the potential visibility of water tanks from other vantage points. The Project utility plan is more detailed than that provided for in the WSP and reflects potential locations for the required water tanks. The tanks are smaller than contemplated in the WSP EIR. These sites are proposed to minimize off-site views, while the use of earth tone colors, berming and landscaping further reduce visual off-site impacts. C. Findings: The Project incorporates and improves on the referenced mitigation measures. The impact of tank visibility is avoided or substantially lessened. See also Findings for Impact 17, incorporated herein by reference. Aesthetics Impacts/Mitigation Measures Identified in the SEIR The impacts of the Project with regard to aesthetics issues are set forth in the SEIR at pages 2-21 to 2-74 . 14. Impact: The proposed development, (371 single family residences, 8. 8 acre community park and associated infrastructure) would change local topography and remove native vegetation through site grading and cut and fill necessary to constructthe project. The local visual character of the portion of the site proposed for development would be changed from a mixture of oak woodlands and grassland savannah to a meandering residential subdivision. a. Mitigation: (1) Mitigation Measures Incorporated into the Project (a) Mitigation measures set forth in the WSP EIR at 4 .4-1 through 4 . 4-10 are incorporated into the Project design. (See further discussion under Facts, below. ) (2) Additional Mitigation Measures (a) The applicant shall prepare and submit detailed landscape plans to the County for review and approval prior to approval of the project's final subdivision map. The plans should identify the location, type and size of all trees to be planted. All plants should be native species to provide visual integrity and water conservation. See also Condition 3 .L. , 28 and 29 . (b) Construction period monitoring during construction should occur to document compliance with the proposed Design Guidelines and related commitments that would mitigate visual impacts. See also Condition 16 A-I. (c) The proposed Design Guidelines and all related measures should be reviewed by County Staff and should be made into formal conditions of approval. See also Condition 30 A-P. 18 (d) Careful consideration should be given to the design features of the 3 agricultural lots. Specific design considerations should include low profile structures, use of muted earth tone colors, control of exterior lighting and screening that uses existing vegetation and introduced landscaping that is indigenous to California. See also Condition 5. b. Facts: As stated above, the WSP EIR identified general visual impacts with regard to residential development in the Project area, and set forth "guidelines and standards" which would help to mitigate the potential visual impacts at 4 . 4-1 through 4 . 4-10. (See SEIR at p. 2-31, 2-32 , and-Appendix C) . These measures have been integrated into the Project. A visual analysis of the Project was submitted on behalf of the applicants by Computer Applications for Design Professionals (CAPD) . The visual analysis utilized the same local view points as set forth in the WSP, plus vantage points from Bishop Ranch Regional Open Space (BROS) and Norris Canyon Road. The visual analysis included both a viewshed analysis and visual simulations of the project. The SEIR further lists four additional mitigation measures, which are set forth at (a) - (d) , above. The incorporation of the WSP EIR mitigation measures, and the additional SEIR mitigation measures Project design and Conditions of Approval will ensure that impacts are significantly reduced or avoided. Major features of the Project include clustering the development within 288 acres of the 1, 143 acre site, extensive landscape plans, reforestation plans, stepped home designs and retaining the great majority of property in open space. Areas of open space are interspersed between homes and the large lots reduce massing of residences. Grading is greatly reduced from that contemplated in the WSP EIR. The Project includes tree replacement in visually strategic locations at an ultimate ratio of at least 3 : 1. The visual character of a portion of the site would change. However, given the site's topographic features and location, only portions of the developed area are visible from any off-site vantage point. The visibility of the Project and proposed development varies greatly depending on viewing location. No single location provides a complete view of the entire development. As identified in the visual analysis, the project is most visible from Norris Canyon Road and the BROS (both locations are adjacent to the Project) . From points within the San Ramon Valley, the project would be less visible as a result of intervening ridges which shield the majority of the site west and north of the cross- valley ridge. The Project site is located within the County's ULL and is designated for residential uses. The SEIR confirms that mere "visibility" of homes is not in itself an adverse visual impact, particularly in areas designated for residential use. The significance of the visual impacts depends greatly on many factors, including distance, shielding by vegetation and topography, architectural design, etc. The integrity of the open space qualities of the ridgeline and its lower hillsides 19 not substantially preserved through the development approach used here. The mitigation measures the site topography, Project design and significant open space preservation will ensure that visual impacts are minimized to a level of insignificance. The SEIR sets forth examples of development which could create potentially adverse visual impacts: construction on top of a major ridge which alters the visible topography of the ridge; creation of a scar on an open hillside; or development which significantly alters the aesthetic character of a public natural preserve or open space. This Project avoids such impacts. Finally, the SEIR confirms that the primary concern with regard to a hillside development is to place lots and homes in such a manner "so they blend in with the surrounding topography rather than changing the topography to allow for the development". The Project, with the mitigation measures as proposed, addresses this concern. C. Findings: Based upon the Final EIR and the entire record before the Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Board adopts mitigation measures set forth at (a) - (d) , above. With such mitigation measures, Project design, and site topography and Conditions of Approval and with incorporation of the WSP EIR mitigation measures into the Project, the Project visual impacts as set forth above have been avoided or substantially lessened. Given the sites topographic features and location, combined with these measures, only portions of the developed area will be visible, and such visibility is made insignificant. (2) Remaining Impacts See Section C. 5.b(2) on page 11, incorporated herein by referenced and applied to any remaining impacts relating to visual impacts. 15. Impact: Norris Canyon Road is designated a scenic roadway. A major portion of the project site is within the viewshed of Norris Canyon Road. This viewshed falls within the designated scenic corridor of Norris Canyon Roadway. The change in view for motorists travelling along Norris Canyon Road would be considered substantial in terms of the scenic resources along Norris Canyon Road. The primary visual change in this area would be the construction of the split entry roadway, new pavement and the homes in the foreground. Improvements to Norris Canyon Road itself ere addressed in Findings for impact 12 . The Westside Specific Plan development set back from the road is being followed by the project. These changes would disrupt current views of open space along this 2500 foot section of Norris Canyon Road. The remainder of the viewshed from Norris Canyon Road may also be disrupted. a. Mitigation: (1) Mitigation Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures 20 (a) Redesign project entrance road from a split double entrance to a single road (in-split) conventional access. This measure will reduce the visual impact of the proposed large entrance road and be more in character with the rural setting along Norris Canyon Road. See also Condition 3 .E. , 3 .F. , and 49 .Q. (b) If additional mitigation is deemed necessary to address County scenic corridor policies related to Norris Canyon Road, alternative mitigation could be considered which could include redesigning the project to further minimize tree removal, grading, and the visibility of homes. b. Facts: The SEIR sets forth two additional mitigation measures at (a) and (b) , above. Mitigation measure (a) has been incorporated into the Project. The redesigned Project entrance road from a split double entrance to a single road access significantly reduces the visual impact of the entrance from Norris Canyon Road. While some new homes would be visible from Norris Canyon Road, the great remainder of the developed area will be screened by on-site topography and vegetative cover. New homes will be clustered and separated visually by open space areas and thick woodland drainages which would remain after completion of the Project. Design review of each home and lot development plan within the Norris Canyon Road Viewshed is required. With regard generally to views of the Project from Norris Canyon Road, the change in view would occur generally only in the location of the Project site. The road segment affected by the Project is relatively short. Mitigation measure (b) , which proposes redesign of the project to further minimize tree removal, grading, and visibility, is unnecessary, and infeasible. The Project has been redesigned to minimize tree removal, grading, and visibility to its current state. With regard to tree removal: the proposed Design Guidelines and reforestation plan are adequate in reducing the impact. With regard to grading, the proposed grading and landscaping plans greatly reduce grading from that recommended in the WSP EIR. With regard to visibility, the new visual analysis demonstrates that with incorporation of mitigation measures referenced in these Findings (regarding landscaping, grading, use of earth tones, vegetation, etc. ) visibility is reduced to a minimal extent. C. Findings: Based upon the Final EIR and the entire record before the Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Board adopts the mitigation measure (a) above. With such mitigation measure and related Conditions of Approval, the Project visual impacts on Norris Canyon road are avoided or substantially lessened. The Project entrance road shall be redesigned to a single road, conventional access. The Norris Canyon Road segment affected visually by the Project is relatively short. Incorporation of mitigation measures in these Findings regarding landscaping, grading, use of earth tones, vegetation, design review etc. , will ensure that visibility is reduced. Mitigation measure (b) , which proposes redesign of the project to further reduce tree removal, grading, 21 and visibility, is rejected as infeasible inappropriate under Public Resources Code Section 21085 and CEQA Guidelines 15041, and not required under the County General Plan. The Project has been redesigned to minimize these impacts to the greatest extent possible. Other mitigation measures with regard to landscaping, reforestation, and grading have been incorporated into the Project to lessen these impacts. (2) Remaining Impacts See Section C. 5.b(2) on page 11, incorporated herein by reference as to this impact. 16. Impact: The view to the west from Bishop Ranch Regional Open Space (BROS) would be substantially . changed by the proposed project. . This change would include construction period disruption, grading of the cross-valley ridge and the construction of the homes visible from BROS vantage points and certain off-site locations. a. Mitigation: (1) Mitigation Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) The lots along the south side of "A" Drive in the vicinity of the cross-valley ridge should be subject to Architectural Review by the Zoning Administrator prior to the issuance of building permits for these lots. Architectural review should focus on the following design concepts to reduce visual impacts: 1) To reduce the height of structures, it may be appropriate to limit some of the homes on these lots to one story. 2) Variable sideyard setback variances should be considered to reduce massing and break- up the visual appearance of homes in this area. 3) Consider moving homes closer to the street (reduce front yard setback requirements) to allow more backyard area to reduce visual appearance. 4) Consider additional landscape requirements for backyards, including the use of tall growing trees and shrubs (native species) to shield homes in this area. 5) Require home and roof colors to be muted so the homes blend in with existing native vegetation. See also Condition 5 and 30.0. b. Facts: The WSP EIR set forth visual mitigation measures to reduce impacts on the cross-valley ridge at 4 .4-11. The Project incorporates many of the features of this mitigation measure. The WSP EIR findings state that the visual impacts of development in such area, at least at the specific plan level of detail do not appear to be substantially mitigated. 22 The SEIR set forth the architectural review standards listed above at (a) 1) through (a) 5) . These standards are included in the Project Conditions of Approval. These standards will reduce the visual appearance of the homes. The view to the west from the BROS would be changed by the Project. This change would include construction period disruption including grading of the cross-valley ridge. However, grading of the cross-valley ridge would be less than envisioned by the Westside Specific Plan (Project grading lowers level by 50 feet, vs. 90 feet proposed in WSP) . The BROS vantage points with viewsheds to the west would be affected, but views to the north, east, south and southwest would not be affected. However, this change would be off-set to some degree by trail access to new vantage points with views from higher elevations. These new views would include new areas and would provide improved views of Mt. Diablo and the San Ramon Valley. "H" Court has been revised. Park District concerns have been addressed by changes to the Project and conditions. c. Findings: Based upon the Final EIR and the entire record before the Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Board finds that WSP EIR mitigation measure 4. 4- 11 has been incorporated into the Project. The Board further adopts the mitigation measures at (a) 1) through (a) 5) , above. With such mitigation measures and the applicable Conditions of Approval, the Project design and site topography, the Project visual impacts relating to view changes from BROS and construction period disruption will be avoided or substantially lessened. No additional mitigation measures are required to reduce this impact to a level of insignificance. Removal of units would be inconsistent with PRC Section 21085 and CEQA Guidelines 15041 and is not required under the County General Plan. (2) Remaining Impacts See Section C. 5.b(2) , page 11, incorporated herein by reference as to this impact. 17. Impact: The proposed project would include four (4) above ground water tanks. The tanks would be 15 to 18 feet in height and would represent another development feature in the landscape. It is important to note that these tanks would be substantially smaller than the existing tanks on the hillside facing the San Ramon Valley. a. Mitigation: (1) Mitigation Measures Incorporated Into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) Design the water tanks in a manner such that their visibility is minimized. The use of a color or colors that blend into the individual sites and landscape screens should be required. See also Condition 3 .K. 23 b. Facts: The WSP EIR set forth mitigation measures to reduce visual impacts associated with the placement of water towers on the Project site at 4 .4-20 through 4 . 4-22 . The mitigation measure at 4 . 4-20 requires location of water tanks in consideration of minimizing visibility from Norris Canyon Road and San Ramon Valley Boulevard. This measure has been incorporated into the project. The remaining two mitigation measures are set forth in mitigation measure (a) , above. By designing the water tanks to minimize visibility, and using colors blending into individual sites, and use of landscape screens, any impact from such tanks is avoided or substantially lessened. c. Findings: Based upon the Final EIR and the entire record before the Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Board adopts mitigation measure (a) , set forth above. The Project visual impacts from construction of the water towers will be avoided or substantially lessened with such mitigation measure. The incorporated WSP EIR mitigation measures, and applicable Conditions of Approval. No additional mitigation is required to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section 5.C.b(2) , on page 11, incorporated herein by reference as to this impact. 18. Impact: The project would include street lighting and lighting associated with individual residences. The specific design and placement of street lighting and lighting associated with each residence are not fully identified in the proposed Design Guidelines, but the formation of the Wiedemann Ranch Architectural Review Board is charged with overseeing this potential impact issue. a. Mitigation: (1) Mitigation Measures Incorporated into the Project (None) (2) Additional Mitigation Measures (a) Street lighting for the project should utilize down-focus lights to minimize "glow". See also Condition 3 .H. b. Facts: Use of down-focus lights will minimize any "glow" to insignificant levels. C. Findings: Based upon the Final EIR and the entire record before the Board, the Board find that: (1) Impacts Avoided or Substantially Lessened The Board adopts mitigation measure (a) set forth above. The Project impacts from increased "glow" will be avoided or substantially lessened with this mitigation measure and the applicable Conditions of Approval. Design of individual homes and lighting with visual sensitivity and this glare sensitivity will be reviewed with the added purpose of reducing 24 reflection. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as to this impact. 19. Impact: Contra Costa County General Plan Policy (GP Policy 9-11 and others) refers to protecting slopes of 26% and higher. The proposed project includes development on slopes over 26%. a. Mitigation Measures: (1) Mitigation Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures The Project design guidelines should be included in the Conditions of Approval. See Condition 30. b. Facts: The Project site contains varied, hilly topography. The Project would thus result in grading in areas over 26% slope. The Contra Costa County General Plan's Open Space Element, at the Scenic Resource Section, contains Policies regarding protection of scenic resources. The SEIR identified the Policies affecting aesthetics as follows: (1) Development on 26% slopes (Policy 9-11) . Policy 9- 11 is summarized as follows: High quality engineering of slopes shall be required to avoid soil erosion, downstream flooding, slope failure, loss of vegetative cover, high maintenance costs, property damages, and damages to visual quality. , Particularly vulnerable areas should be avoided for urban development. Slopes of 26% or more shall be protected and are generally not desirable for conventional cut-and-fill pad development. Development on open hillsides and significant ridgelines shall be restricted. The Staff Report at Figure 3 depicts the location of areas on the side less than and greater than 26% slope. Figure 14 of the Staff Report depicts the areas over 26% where grading activities would occur. General Plan Policy 9-11, above, confirms that grading in areas over 26% is not precluded, but should be evaluated on a case-by-case basis. Consistent with the direction of the Board at its February, 1992 hillside workshop, (those proceedings including the staff report, exhibits and the transcripts, are included as part of the administrative record) , each project must be evaluated to determine the amount of slope protection required. The analysis in the staff report for that workshop confirms that the hillside policies do not prohibit development on open hillsides or slopes over 26% and instead generally require limited sensitive hillside development. Opponents to the Project who objected to it on the 25 ground that it did not comply with this policy have misinterpreted it. Protection of hillsides does not mean prohibition of hillside development. As interpreted by the Community Development Department and the Board, it means sensitively designed development in combination with open space and with cut and fill grading limited in scope and area. The Project is consistent with Policy 9-11. The Project proposes no development on significant ridgelines. Development on open hillsides will be restricted to a relatively small area. The Project design will ensure protection of slopes over 260. The Project will minimize the use of conventional cut and fill pad development. Development will be tailored to each lot. Further, the Project includes detailed site specific Design Guidelines, which were reviewed in the SEIR. The Design Guidelines include guidelines and recommendations regarding development on each lot within the Project. The Design Guidelines contain specific development specifications and construction recommendations, and will ensure that the Project is sensitively developed and consistent with the County's hillside protection standards. (2) Other General Plan Policies: Other General Plan Policies pertaining to aesthetics addressed in the SEIR are as follows and as more specifically produced in the project approval and its Conditions of Approval: Restore natural contours and vegetation after grading. (Policy 9-12) : The Project landscaping, vegetation, and reforestation plans will ensure this Policy is followed. Provide public facilities for outdoor recreation. (Policy 9-13) : The Project provides for a 8.8 acre park area consistent with this Policy. Avoid extreme topographic modification/cluster and utilize planned unit development approaches. (Policy 9-14) : The Project avoids filling in canyons or removing hilltops substantially. The Project greatly reduces the grading contemplated in the WSP EIR. The Project clusters homes in a relatively small development area. The Project utilizes the planned unit approach. The only major cut on the site other than for roadways and infrastructure is in the area of the Cross-Valley ridge. Due to its location and the topography, the visual impacts are limited and can be mitigated by design. A roadway in that area and therefore the cut is necessary to provide circulation and good emergency access. The area of substantial fill is located in the largely invisible interior bowl. This cut and fill. is unavoidable and not precluded by this policy. New water tanks should be screened. (Policy 9-16) . The Project reduces visual impacts of the water tanks. (Policy 9-16) (See discussion under Impact 4, above. ) Construction of structure on top of major scenic ridges or within 50 feet of the ridgeline shall be discouraged. (Policy 9-18) The Project does not propose development on top of Wiedemann Hill. The project avoids construction within 50 feet of major scenic ridges. 26 For hillside development, structures shall be located sensitively to available natural resources and constraints. (Policy 9-19) The Project design and the Design Guidelines ensure sensitive development. Hilltops, ridges, rock outcroppings, mature stands of trees and other natural features shall be considered for preservation. (Policy 9-20) The Project protects hilltops, ridges, rock outcroppings and, to the extent reasonably feasible, most mature stands of trees. The Design Guidelines ensure continued protection at the development stages. New development shall be encouraged to generally conform with natural contours to avoid excessive grading. (Policy 9-21) The Project submittals show conformance with natural contours, grading for infrastructures and minimized use of conventional flat pads. New land uses below a major scenic ridge shall be reviewed with emphasis on protecting the visual dualities of the ridge. (Policy 9-22) The Project protects the visual qualities of the major scenic ridge. the open space integrity of the hillsides below has been preserved in the context of the entire area. Development areas are clustered but with large lots. Design of the individual lots and homes will be subject to careful review and approval. No development is proposed for Wiedemann Hill. Physical and visual access to established scenic routes shall be protected. (Policy 9-27) The Project includes access to scenic routes and trails as requested by the East Bay Regional Parks District. Visual impacts of the Project from Norris Canyon Road are minimized by redesigning the Project entrance, and design control over homes and lots visible from there. Moreover, the Project is visible only for a short moment driving along Norris Canyon Road. C. Findings: Based upon the SEIR and the entire record before the Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project, is consistent with the General Plan Policies regarding development on slopes greater than 26% (Policy 9-11) . The Project, with the proposed design guidelines, avoids or substantially lessens the impacts associated with development on slopes greater than 26%. The Project is consistent with the remaining General Plan Policies regarding aesthetics (Policies 9-12 , 9-13 , 914 , 9-16, 9-18, 9-19, 9-20, 9-21, 9-22 , and 9-27) , for the reasons set forth above. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. Elimination of homes is rejected as unnecessary to meet the General Plan policies and is any inappropriate mitigation measure under PRC Section 21085 and CEQA Guidelines 15041. (2) Remaining Impacts See Section C. 5.b(2) , page 11, incorporated herein by reference as to this impact. 27 Traffic Traffic Impacts/Mitigation Measures Identified in the WSP SEIR 20. WSP Impact: Without development of Westside, the future base volume on Norris Canyon road, east of Bollinger Canyon Road, would carry 6, 600 daily vehicles. Taken together with the development of Westside, volumes of up to 7 , 400 vehicles per day could be anticipated on this roadway. This is a significant impact. a. WSP EIR Mitigation Measures: The WSP and WSP EIR set forth mitigation measure 4 . 5-1 to mitigate this impact. Such measure generally recommends modifying the Norris Canyon/Bollinger Canyon intersection to restrict through movements and selected turn movements on Norris Canyon, while allowing pedestrians, bicycles and emergency vehicles to cross. b. Facts: The City of San Ramon rejected the above mitigation measure as infeasible, because it could involve barricading Norris Canyon Road in some manner, causing increase in noise, pollution, and in congestion at other intersections. The City adopted a statement of overriding considerations, confirming that the benefits of minimizing vehicle traffic outweigh the stated impact. As part of the SEIR process, Korve Engineers, focusing on this project only and an updated cumulative impact analysis, completed a Traffic Impact Study for Wiedemann Ranch Residential Community, April, 1992 (Traffic Impact Study) . The Traffic Impact study and SEIR propose three additional mitigation measures to reduce future impacts on Norris Canyon Road (see SEIR Traffic Impact 2 and corresponding mitigation measures set forth below. ) The Traffic Impact study confirmed that although increased traffic on Norris Canyon Road resulting from the Project would not warrant the road to be widened immediately, the road may need to widened in the future. The mitigation measures thus require the Project to contribute its fair share of the costs for such widening. The Project will in fact be responsible for its entire cost. C. Findings: The Project impacts on Norris Canyon Road have been avoided or substantially lessened by incorporation into the Project of the mitigation measures the Project Conditions of Approval set forth at SEIR Traffic Impact 2 of these Findings and, for the reasons set forth under Facts of that section. See also Section C. 5 .b(2) on page 11, incorporated herein by reference as to this impact. 21. WSP Impact: The proposed project would contribute to cumulative impacts at the San Ramon Valley Boulevard/Norris Canyon Road and San Ramon Valley Boulevard/Bollinger Canyon Road intersections. Even without traffic associated with the proposed Westside Specific Plan, these intersections would experience cumulative impacts and would operate at LOS F and LOS E, respectively. These are significant impacts. a. WSP EIR Mitigation Measures: The WSP EIR set forth mitigation measure 4 . 5-2 , generally requiring restriping the westbound approach on Norris Canyon Road at San Ramon Valley Boulevard and modifying the traffic signal phasing; and mitigation measure 4 . 5-3 , requiring the northbound leg of San Ramon Valley Boulevard at San Ramon Valley Boulevard and Bollinger Canyon Road (see SEIR at Appendix C, p. 5) . 28 b. Facts: The City of San Ramon found as part of the WSP EIR findings that the above road improvements "will be implemented when warranted by future development", and that improvements will be funded through traffic mitigation fees. Subsequently, the above referenced Project Traffic Impact Study specifically studied these intersections with regard to potential Project impacts. The Traffic Impact Study confirmed that the Project has an insignificant effect on these intersections. The Traffic Impact Study did not recommend these specific mitigation measures for this Project; however the Project is required to pay its fair share for traffic improvements as set forth in the Findings below. In fact, the Project may be responsible to construct the signal at Norris Canyon/Bollinger Canyon if warranted by a future, updated study. C. Findings: The Project impacts on the intersections set forth above are insignificant. To the extent the Project has any impact on these intersections, such impact has been avoided or substantially lessened by mitigation measures set forth in these Findings below. See also Section C. 5.b(2) on page 11, incorporated herein by reference as to this impact. Traffic Impacts/Mitigation Measures Identified in the SEIR The impacts of the Project with regard to traffic issues are set forth in the SEIR at pages 2-75 to 3-1. 22. Impact: Access to the proposed project would be via Norris Canyon Road. The existing access to the project site is inadequate and a new intersection is proposed. a. Mitigation: (1) Mitigation Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) The Project entrance from Norris Canyon Road should provide for a westbound left turn into the Project. The left turn lane will allow Project traffic to be removed from the westbound through lane and permit the through movement to continue while Project inbound traffic is waiting for an acceptable gap in eastbound through traffic. The left turn lane should be designed to provide for storage of up to four vehicles (100 feet) with a transition taper adequate for a 35 mph posted speed (10: 1) . A deceleration distance may also be necessary for the left turn lane. See the standards set forth in the Conditions of Approval. See also Conditions 49 .A. 1. b. Facts• (1) Background: Measure C - 1988 , approved by County voters in November, 1988, is entitled the "Contra Costa Transportation Improvement and Growth Management Program" (Growth Management Program) . The Growth Management Program requires local agencies to adopt certain traffic level of service (LOS) standards. The County's Growth Management Element specifically adopts the LOS traffic standards and keys such standards to County areas. The applicant's consultant, Korve Engineering, Inc. , prepared the above-referenced Traffic Impact Study 29 specifically for the Project in accordance with Measure C, above, and with the City of San Ramon's Ordinance 164 . The study area for the Traffic Impact Study was determined through written comments and meetings with the County, CalTrans, and the City of San Ramon. The study area intersections and roadway links include the following intersection locations: Norris Canyon Road and Bollinger Canyon Road Norris Canyon Road and Twin Creeks Drive Norris Canyon Road and San Ramon Valley Boulevard Bollinger Canyon Road and San Ramon Valley Boulevard Bollinger Canyon Road and I-680 ramp terminal (2) Crow Canyon Road and Bollinger Canyon Road Crow Canyon Road and Twin Creeks Drive Crow Canyon Road and San Ramon Valley Boulevard Crow Canyon Road and I-680 ramp terminal (2) In addition, the study includes on-ramps and off-ramps at the Crow Canyon road interchange with I-680 and the Bollinger Canyon Road interchange with I-680. The SEIR thus utilizes the Traffic Impact Study to analyze Project impacts with regard to Measure C requirements. (2) Project entrance: The mitigation measure requires that the Project entrance provide for a westbound left turn lane with storage of up to four vehicles (100 feet) with a transition taper. These measures have been incorporated into the standards for the intersection as part of the Project design and its Conditions of Approval. With incorporation of this measure, the entrance is adequate. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impact of an inadequate entrance has been avoided or substantially lessened by the Project with the requirement of adding a left turn lane as described herein; such addition will allow for a safe and effective entrance. No additional mitigation measures are necessary. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as to this impact. 23. Impact: The Westside Specific Plan recommended the widening of Norris Canyon Road. The proposed project would increase the number of vehicles per day on Norris Canyon Road to 5, 505 from the existing 1, 800. While this change would not warrant the roadway to be widened, the project would contribute to the need for future widening. a. Mitigation: (1) Measures Incorporated into the Project See Discussion under Facts, below. (2) Additional Mitigation Measures (a) The project applicant prior to filing the final subdivision maps, should prepare as geometric analysis (horizontal and vertical alignment) of the segment of Norris Canyon Road east of 30 the project site to Bollinger Canyon Road. See also Condition 49 .B. (b) The project should provide, as a condition of approval, its fair share of the cost of improving Norris Canyon Road to a two-lane roadway with adequate shoulders and removal of the existing curves with a centerline radius of less than 400 feet. The roadway should be striped for bike lanes on both sides as noted in the Westside Specific Plan. see also Condition 49.B. (c) Prior to filing a final subdivision map, the project applicant should be required to post a bond that assures the repair of any damage to Norris Canyon Road that could be caused by construction-related traffic. See also Condition 49 .S. b. Facts: Each of these mitigation measures have been incorporated into the Project by inclusion as conditions of approval. The Traffic Impact Study confirmed that potential improvements to Norris Canyon Road are based primarily on driver safety and convenience and not capacity limitations of the current two lane road. The applicant will construct these improvements at its sole cost subject to potential reimbursement from future projects that impact Norris Canyon Road. Through these conditions of approval, the Project commits to pay at least its fair share of these costs, if not more, and meets the traffic growth management standards in the General Plan. C. Findings: Based upon the Final EIR and the entire record before this Board, this Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts resulting from increased traffic on Norris Canyon Road and the required road improvements have been avoided or substantially lessened by requiring the applicant to construct it from the project intersection to San Ramon. No further mitigation is necessary. (2) Remaining Impacts See Section C. 5.b. (2) , on page 11, incorporated herein by reference for this impact. 24. Impact: Short-term (1997) traffic projections along with project-generated traffic will warrant the installation of a signal at Norris Canyon and Bollinger Canyon Road. This intersection will need to be monitored as the project is constructed and occupied to determine when signal warrants are met. a. Mitigation• (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) When signal warrants are met based on traffic volume survey, the four-way stop controlled intersection should be signalized. The Project should provide its fair share of the cost of the signal. See also Condition 49 .C. 31 b. Facts: The Traffic Impact Study identified the future need for a signal at Norris Canyon Road and Bollinger Canyon Road. The conditions of approval for the Project incorporate the above mitigation measure, requiring the Project to pay at least its fair share of the cost of the signal when warrants are met. This will ensure that funding is available when the signal becomes necessary. If existing, approved and project traffic requires its installation, the applicant will construct it, thereby meeting the General Plan traffic growth management standards. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts on the unsignaled intersection of Norris Canyon and Bollinger Canyon Road have been avoided or substantially lessened by the Project as approved. The Project conditions of approval will ensure the Project pays at least its fair share of the costs when signal warrants are met, and that funding is available when the signal becomes necessary. No additional mitigation is required to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) on page 11, incorporated herein by reference for this impact. 25. Impact: The Norris Canyon/Twin Creeks Drive intersection currently operates at capacity during the AM peak hour. Traffic conditions here are caused by the one lane northbound approach which must provide for left, through and right turn movements. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) The provision of a northbound left turn lane will improve the existing operations to LOS A. This improvement can be achieved by restriping the existing 36-foot curb-to-curb width to accommodate the left turn lane. Parking should be prohibited for the section of Twin Creeks Drive between Norris Canyon Road and Aragon Lane. This improvement is relatively inexpensive and should be implemented by the City of San Ramon based on existing traffic operations. b. Facts: The Norris Canyon/Twin Creeks Drive intersection operates at capacity during the AM peak hour. This congestion is caused by the one land northbound approach, which must provide for left, through and right' turn movements. However, very little Project traffic would use the northbound approach referenced above. The SEIR recommends inclusion of a left turn land (northbound) , which will improve the existing operations to LOS A. The SEIR confirms that this improvement is "relatively inexpensive", and should be implemented by the City of San Ramon based on existing traffic operations, i.e. , the Project does not cause this impact. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: 32 (1) Impacts Avoided or Substantially Lessened The Project impact from the congestion during the AM peak hour at the Norris Canyon/Twin Creeks Drive intersection is not significant. Very little Project traffic uses the northbound approach which causes the problem. The City of San Ramon will be encouraged to provide for the left turn land as referenced. This mitigation is not necessary to apply to this Project. 26. Impact: The I-680 northbound off-ramp/Bollinger Canyon Road intersection currently operates at level of service A, but is projected to degrade to LOS D for short-term conditions. The LOS and V/C are degraded during the AM and PM peak hours. The project does not add a significant amount of traffic to the intersection in the AM peak hour, but contributes to PM peak hour congestion. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) To improve the conditions, another right turn lane is necessary. The Project should contribute its fair share of the cost of this improvement. b. Facts: The Project is not required to contribute to this improvement. Its "fair share" will be used to improve Norris Canyon Road. The Project's contribution will be made by other developer contributions who will not have to contribute to Norris Canyon Road such that their share for the two remaining improvements can be larger which will ensure that funding will be available for this lane. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened . The Project impacts at I-680 northbound off- ramp/Bollinger Canyon Road have been avoided or substantially lessened by having a funding mechanism to cover this cost. The County may prioritize which improvements to construct first. This mitigation is not necessary to apply to this Project. 27. Impact: Consistency with Measure C and General Plan Growth Management Element a. Facts: As stated above, Measure C and the County's Growth Management Element establish Growth Management Performance Standards for traffic levels. These standards are set forth in the County General Plan at p. 4-7 . The County General Plan Growth Management Element states that LOS standards will be considered to be met if: (1) measurement of actual conditions at the intersection indicates that operations are equivalent to or better than those specified in the standard; or 33 (2) the County has included projects in its adopted capital improvements program which, when constructed, will result in operations equal to or better than the standard. In addition to the above standards, the Growth Management Element sets forth Policies which include the following: 4-1. New development shall not be approved in unincorporated areas unless the applicant can provide the infrastructure which meets the traffic level or service and performance standards outlined in Policy 4-3 (below) , or a funding mechanism has been established which will provide the infrastructure to meet the standards or as is stated in other portions of this Growth Management Element. 4-2 . If it cannot be demonstrated prior to project approval that levels of service will be met per Policy 4-1, development will be temporarily deferred until the standards can be met or assured. 4-3 . In the event that a signalized intersection on a Basic Route exceeds the applicable level of a service standard, the County may approve projects if the County can establish appropriate mitigation measures, or determine that the intersection or portion of roadway is subject to a finding of special circumstances, or is a route of regional significance, consistent with those findings and/or action plans adopted by the Contra Costa Transportation Authority pursuant to Measure C - 1988. b. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) The Project is consistent with Policy 4-1. The Project provides the infrastructure necessary to meet the traffic levels of service and performance standards set forth in Measure C and in Policy 4- 3 , for the reasons set forth under Facts for SEIR Traffic Impacts 1-5, above. This project will construct improvements necessary to substantially mitigate the impact of existing, approved and Project traffic and will provide its fair share to substantially mitigate remaining cumulative impacts. (2) The Project is consistent with Policy 4-2 . It has been demonstrated that levels of service will be met per Policy 4-1, above. (3) The Project is consistent with Policy 4-3 . The intersections exceeding the applicable levels of service standards have been given appropriate mitigation measures as set forth in the Facts, Mitigation Measures, and Findings for SEIR Traffic Impacts 1-5, above. No additional mitigation is necessary to reduce this impact to a level of insignificance. See Section C. 5.b(2) , on page 11, incorporated herein by reference for this impact. D. Additional Impacts and Mitigation Measures The impacts set forth in this Section D were identified and addressed in the WSP EIR, and mitigated to insignificant levels pursuant to mitigation measures listed in the WSP EIR and incorporated into the Project. Under CEQA, no further environmental review is required. However, the Project adopts mitigation measures beyond those required in the WSP EIR. In order to identify and ensure adoption of such mitigation measures, the following impacts are set forth. 34 Hydrology, Geology and Soils The WSP EIR and SEIR discuss issues of Hydrology, Geology, and Soils in different sections of those documents. The WSP EIR splits such discussion into two categories: (1) Hydrology; and (2) Soils and Geology. The SEIR utilizes two categories (1) Geology and Soils; and (2) Storm Drainage. Hydrology, Geology and Soils Impacts/Mitigation Measures Identified in the WSP EIR Hydrology 28. WSP Impact: The proposed project will increase stormwater runoff and offsite flood hazards. a. WSP EIR Mitigation Measures: The WSP EIR sets forth mitigation measure 4 . 8-1, which states that the WSP recommends the construction of detention basins to reduce post-project peak flood flows (see SEIR at Appendix C, p.7) . b. Facts: (See discussion of the detention basin under SEIR Impacts, Storm Drainage, Impact 1, Facts, below. ) C. Findings: The Project impact regarding increased stormwater runoff and offsite flood hazards is avoided or substantially lessened by the Project detention basin, for the reasons set forth under SEIR Impacts, Storm Drainage, Impact 1, Facts, below. 29. WSP Impact: The Project will result in a direct loss of 0. 5 mile of creek channel and associate habitat by filling and grading. a. WSP EIR Mitigation Measures: The WSP EIR sets forth mitigation measure 4 .8-2 , which states that the grading plan could be revised to eliminate impacts; and 4 . 8-3 , which states that restoration and channel stabilization may eventually restore creek values. b. Facts: See discussion of Project impacts on creek corridors and habitat under SEIR Impacts, Geology and Soils, Impact 3 , Facts, below. C. Findings: The Project impacts regarding loss of creek channel and associate habitat have been avoided or substantially lessened, for the reasons set forth under SEIR Impacts, Geology and Soils, Impact 3 , Facts. 30. WSP Impact: The proposed project will result in direct impacts to creek channels and associated riparian corridors at road crossings. a. WSP EIR Mitigation Measures: The WSP EIR sets forth mitigation measure 4 .8-4 , which states that in locations where a creek channel will be moved, restoration and vegetation stabilization will restore the natural channel; such measure further states that a specific restoration plan for impacted creeks should be required, with annual monitoring of channel stability and revegetation success. b. Facts: See discussion of Project impacts on creek corridors and habitat under SEIR Impacts, Geology and Soils, Impact 3 , Facts, below. C. Findings: Project impacts on creek channels and associated riparian corridors at road crossings have been 35 avoided or substantially lessened for reasons stated under SEIR Impacts, Geology and Soils, Impact 3 , Facts, below. 31. WSP Impact: The Project will increase urban runoff water pollutants from homes, roadways, and commercial areas. a. WSP EIR Mitigation Measures: The WSP EIR sets forth mitigation measure 4 . 8-5, which states that potential increases in urban runoff can be partially mitigated by a regular street-sweeping program. b. Facts: This mitigation measure has been incorporated into the Project. Conditions of Approval specifying sediment traps, revegetation, and siltation control will also reduce surface runoff pollutants particularly during the grading and installation of Project infrastructure prior to completion of the reseeding and reforestation measures. County and ABAG standards will be implemented into the design level drawings. (See discussion under SEIR impacts, Storm Drainage, Impact 2, Facts, below. ) C. Findings: The Project impacts regarding from urban runoff water pollutants have been avoided or substantially lessened for the reasons set forth under SEIR impacts, Storm Drainage, Impact 2 , Facts, below. ) 32 . WSP Impact: The project will result in potential increased erosion from construction activities and increased site runoff. a. WSP EIR Mitigation Measures: The WSP EIR sets forth mitigation measure 4 .8-6, which states that erosion during construction can be reduced by a specific erosion control plan which utilizes on-site measures; and that the proposed detention basin be designed to function as sediment basins during construction. b. Facts: The above mitigation measures have been incorporated into the Project. See also, WSP EIR Impacts, Soils and Geology, Impact 3 , Facts, below. C. Findings: The Project impacts regarding increased erosion from construction activities and site runoff are avoided or substantially lessened for reasons stated above and at WSP EIR Impacts, Soils and Geology, Impact 3 , Facts, below. Soils and Geology 33. WSP Impact: Earthquake ground shaking from earthquakes on the Calaveras fault zone, which could be violent to very violent in areas within one mile of the fault zone for an MCE, or earthquakes on other active or potentially active faults in the region, could result in significant damage to improvements, or loss in life, from the primary or secondary effects of shaking, including possible failure of cut and fill slopes, fill settlement, and possible re-activation and/or initiation of landslides. a. WSP EIR Mitigation Measures: (1) The WSP EIR at mitigation measure 4 . 9-4 states that the primary effects of ground shaking can be reduced to acceptable levels by using modern seismic design and building in accordance to Codes. (See SEIR, Appendix C, p. 8) (2) The WSP EIR at mitigation measure 4 . 9-5 states that in areas that will not be developed by extensive grading, secondary effects of ground shaking can be reduced by: sitting improvements off unstable 36 landforms; removing or stabilizing unstable landforms; and/or using modern designs. (See SEIR, Appendix C, p. 8) (3) The WSP EIR at mitigation measure 4 . 9-6 states that in areas that will be developed by extensive grading, the secondary effects of ground shaking can be reduced by using appropriate grading and design. (See SEIR, Appendix C, p. 8) b. Facts: (1) Facts regarding mitigation measure 4 . 9-4, above: Harlan Tait Associates drafted reports entitled "Geotechnical Feasibility Investigation" (revised February, 1991) and "Geotechnical Feasibility Investigation Norris Canyon Widening". These reports detail preliminary geotechnical design and construction considerations for incorporation into the design level drawings. Recommendations such as 2 to 1 cut and fill slopes, normal surface and subsurface drainage, and foundation design are provided to express that the development concept is feasible from a geotechnical standpoint. (2) Facts regarding mitigation measure 4 . 9-5, above: A study entitled "Preliminary Evaluation of Geotechnically Feasible Landslide and Related Slope Mitigation Measures" was prepared for the Project by Harlan Tait Associates, and submitted for review to Darwin Myers Associates (the County's independent 3rd party peer review consultant) . Darwin Myers Associates found that the geologic and geotechnical reports and accompanying data meet County ordinance code requirements for the processing of the rezoning, preliminary development plan and tentative map. Harlan Tait Associates will provide site specific detailed geotechnical and civil engineering solutions in (and incorporated into) the design level drawings. These design level drawings will be subject to review again by Darwin Myers Associates to assure that appropriate mitigation actions are included in the project construction drawing. Harlan Tait Associates will provide on-site supervision of the infrastructure activities and be responsible in conjunction with HCV to interact with the County inspectors to assure compliance with all construction permits. (3) Facts regarding mitigation measure 4 . 9-6, above: (See same Facts as for 4 . 9-5, above) C. Findings: The Project impacts regarding future earthquake and potential damage to life or property have been avoided or substantially lessened by incorporation into the Project of the mitigation measures set forth above from the WSP EIR, and the Project conditions of approval, which incorporate results and safeguards of the referenced reports. 34. WSP Impact: Expansive soils (those with a high shrink potential) , and possibly expansive bedrock materials, occur in areas to be developed and can cause significant damage to foundations, slabs, and pavements constructed on them. a. WSP EIR Mitigation Measures: The WSP EIR sets forth mitigation measure 4 . 9-7 , stating that the significant effects of expansive soils/bedrock can be controlled by recognition of the condition and appropriate design. 37 Typical measures include drilled pier and grade beam foundations, etc. (See SEIR at Appendix C, p. 9) b. Facts: The recommended detailed site specific soil investigations for the Project will be a continuation of the preliminary investigations previously accomplished by Harlan Tait Associates. The WSP EIR mitigation measures, such as drilled pier foundations and grade beam foundations and thicker pavement sections, are appropriate measures to off-set the effects of expansive soils/bedrock. These measures have been incorporated into the Project. Each individual lot will be required to submit a site specific geotechnical report with recommendations for foundation design, etc. These reports will be reviewed by the County during building permit processing. C. Findings: The Project impacts related to expansive soils have been avoided or substantially lessened by Project incorporation of the above mitigation measure, and by use of the reports identified in the SEIR. 35. WSP Impact: Increased construction-related short term, and possibly increased long term, erosion and sedimentation will result from grading activities, alteration of drainage patterns, concentration of drainage, and increased runoff associated with proposed development. a. WSP EIR Mitigation Measures: (1) The WSP EIR at mitigation measure 4 . 9-8 states that construction-related short term erosion and sedimentation can be significantly reduced by timing grading activities to avoid the rainy season, and by interim and over-winter control measures. (See SEIR at Appendix C, p. 10) (2) The WSP EIR at mitigation measures 4 . 9-9 states that long term erosion can be reduced by development of an overall erosion and sediment control plan, by appropriate design and construction, and by continued maintenance. (See SEIR at Appendix C, p. 10) b. Facts• (1) Facts regarding mitigation measure 4 . 9-8, above: Project submittals detail the erosion and sedimentation control plans that will meet Contra Costa County guidelines and ABAG Manual of Standards. Areas of grading, stabilization methods, areas to be revegetated and types, quantities, and methods of seeding are detailed on submitted reforestation plans and Sugnet's Biotic Resource Assessment and Habitat Mitigation Plan (see SEIR Geology and Soils Impacts, Impact 3 , Facts, below. ) Siltation control measures such as hay bales, earth berms, sandbagging or silt fences will be detailed to the County's satisfaction in the working drawings. Control measures will be installed by October 15 and maintained through April 15 of each construction year. These mitigation measures have been incorporated into the Project. (2) Facts regarding mitigation measure 4 . 9-9 , above: (See same Facts as for measure 4 . 9-8, above) . C. Findings: The Project impacts from erosion and sedimentation from grading will be avoided or substantially lessened by Project incorporation of the above mitigation measures. 38 36. WSP Impact: Areas of slope instability occur in areas to be developed and could result in damage to improvements or loss of life. a. WSP EIR Mitigation Measures: The WSP EIR at mitigation measure 4 . 9-10 states that the above impacts can be significantly reduced or prevented by: recognition of the conditions; sitting specific improvements off unstable landforms; accommodating the impact; removing unstable materials; stabilizing unstable materials; and reconstruction. (See Appendix C of SEIR at p. 10) b. Facts: The above mitigation measure has been incorporated into the Project. See discussion at SEIR Impacts, Geology and Soils, Impact 1, Facts, which lists the geotechnical studies performed. These studies confirm the Project can be constructed safely and securely. Detailed design level geotechnical investigations that expand on the geotechnical feasibility studies will be prepared for review by the County's consulting expert to assure that potential geologic hazards are avoided and/or mitigated. C. Findings: The Project impacts regarding areas of slope instability have been avoided or substantially lessened with incorporation of the above mitigation measure into the Project, and for the reasons set forth under SEIR Impacts, Geology and Soils, Impact 1, Facts, below. The approved geotechnical data confirms the Project can be constructed safely and in a stable manner. 37. WSP Impact: Permanent . changes in existing topography and natural surface and near surface geologic conditions will occur in some areas to be developed, particularly in the Norris Canyon Road Area, where proposed grading will involve excavations up to about 90 feet and fills up to about 45 feet. a. WSP EIR Mitigation Measures: The WSP EIR at mitigation measure 4 . 9-11 states that permanent changes in existing topography and natural surface and near surface geologic conditions are an "unavoidable impact" of extensive grading. This measure further states that visual 'impacts of extensive grading can be reduced by: sensitive engineering design, using gradual transitions from graded areas to natural slopes. (See Appendix C of SEIR at p. 11) b. Facts: See discussion under SEIR Impacts, Geology and Soils, Impact 1, Facts, below. C. Findings: The Project impacts regarding changes in existing topography have been avoided or substantially lessened by incorporation of the referenced WSP EIR mitigation measure, and for the reasons set forth under SEIR Impacts, Geology and Soils, Impact 1, Facts, below. For these wSP Impacts 33-37, see Section c.b. 5. , on page 11, incorporated herein by reference. Geology and Soils and storm Drainage Impacts/Mitigation Measures Identified in the SEIR The impacts of the Project with regard to geology and soils issues are set forth in the SEIR at pages 3-1 to 3-16; storm drainage impacts are set forth at pages 3-40 to 3-45. Geology and Soils 38. Impact: The proposed project will result in significant grading on the project site. This grading will occur in areas with geotechnical constraints (steep slopes, landslides) but 39 would be conducted in accordance with detailed specifications to minimize impacts and repair landslides. a. Mitigation: (1) Measures Incorporated into the Project The WSP EIR at mitigation measure 4 .9-11 states that visual impacts can be reduced by sensitive engineering design, using gradual transitions from graded areas to natural slopes. This measure has been incorporated into the Project. (2) Additional Mitigation Measures Proposed by SEIR (a) Additional subsurface exploration and engineering analyses should be conducted to establish geotechnical criteria for the project prior to submittal of the Final Subdivision Map to the County. The geotechnical criteria development for the project should be submitted to the County for review and approval prior to filing the Final Subdivision Maps. See also Condition 13 . (b) All grading procedures should be accurately documented and submitted to the County. A final grading report should be submitted to the County upon completion of grading. The report should contain a detailed as-graded geologic map signed by the geotechnical engineer and engineering geologist. The map should show all encountered faults, aquifers, and stratigraphic (bedrock) units. Information on the orientation of bedding and dominant jointing should be mapped. The map should also identify severely weathered and highly sheared rock, as well as seepage. It should also include the location of all subdrains and their connections. See also Condition 10. (c) The County should inspect and review the grading procedures periodically to ensure compliance with grading codes. b. Facts• (1) Background: To provide Project-specific information regarding potential geologic and soils impacts associated with development on the Project site, and to supplement the previous analysis prepared for the WSP EIR, several geotechnical and related reports were prepared: (1) Geotechnical Feasibility Investigation prepared by Harlan Tait Associates, August 1990, revised February, 1991; Landslide Repair Plans prepared by Harlan Tait Associates, March 1992 ; Comparative Grading Analysis prepared by Aliquot Engineers, 1992 ; and a Creek Setback Analysis by Harlan Tait Associates. Additionally, the geotechnical feasibility of the Project was independently reviewed by Darwin Meyers Associates. Darwin Meyers reviewed the Geotechnical Feasibility Investigation report and the Landslide Repair Plans to determine whether they adequately address potential impacts. Their findings are summarized in the SEIR. Darwin Meyers concludes that the geologic and geotechnical reports and accompanying data provided regarding the project meet County ordinance requirements. (2) Grading Impacts: The Project provides for contoured grading to avoid abrupt transitions, incremental 40 terracing where appropriate, minimum roadway widths, and extensive revegetation and reforestation. The Comparative Grading Analysis identifies differences between the grading required for the WSP in the Project area, and required for the Project. The Project would significantly reduce the amount of grading, cut and fill necessary (see SEIR at p. 3- 7, 3-8) . C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts from grading are avoided or significantly lessened. The WSP EIR mitigation measure and the SEIR mitigation measure have been incorporated into the Project. No additional mitigation measures are necessary to reduce the impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference. 39. Impact: The project would require drainage improvements including construction and maintenance of surface and subsurface drainage facilities and a stormwater detention basin. In addition, maintenance of repaired landslide areas would be required. a. Mitigation: (1) Measures Incorporated into the Proiect A detention basin has been incorporated into the Project (see discussion under Facts, below) . (2) Additional Mitigation Measures (a) Surface and subsurface drainage improvements should be regularly cleaned of sediment and vegetation to ensure proper function and slopes and drainage terraces should be properly maintained. A maintenance plan should be prepared by a registered civil engineer and approved by the County. See also Conditions 15. (b) A Geologic Hazards Abatement District (GHAD) made of project property owners should be formed to finance the maintenance of slopes, drainage terraces and subdrains. If a GHAD is not formed, the homeowners association should be given these maintenance responsibilities. (Note: the project applicant has proposed the formation of a maintenance assessment district composed of the 371 lots within the project for prevention, mitigation, abatement or control of geologic hazards, and the maintenance of drainage facilities. ) Areas maintained by the homeowners should include areas on the periphery of the development containing adjoining landslides not including public land. See also Condition 15. b. Facts: The Project includes a detention basin and related facilities. The Project further includes formation of a maintenance assessment district composed of the 371 lots within the project for prevention, mitigation, abatement or control of geologic hazards, and the maintenance of drainage facilities. 41 C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened Project impacts requiring drainage improvements and detention basins have been avoided or substantially lessened. The WSP mitigation measures and the above mitigation measures have been incorporated into the Project and its Conditions of Approval by requiring a detention basin and maintenance assessment district. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 40. Impact: Landslide repair may affect creek corridor areas and disrupt additional wildlife habitat. a. Mitigation: (1) Measures Incorporated into the Project The WSP EIR set forth mitigation measures 4 . 8-2 , 4 .8-3 , and 4 . 8-4 , as set forth under WSP Impact 2 , above. (2) Additional Mitigation Measures (a) Specific landslide repair techniques should be defined during the final design of the project. With respect to landslides #5, 15, 21, 16, 19 , 46 and 58 as depicted on Sheet 2 of the Landslide Repair Plans, landslide repair techniques, other than remove and replace, should be employed to avoid additional impact to creek areas, if possible, (i.e. buttresses, crib wall, soldier piles etc. ) . The landslide repair techniques for each landslide will be reviewed and approved by the County prior to approval of the Final Development Plan and Final Subdivision Map. See also Condition 14 . b. Facts: The WSP EIR proposed mitigation measures referenced above have been incorporated into the Project. The Project grading plan has been designed to reduce impacts. The Project includes restoration and channel stabilization. The Biotic Resource Assessment and Habitat Mitigation Plan, (Resource/Habitat Plan) dated August 27 , 1991, was prepared by Sugnet & Associates on behalf of the applicants. The Resource/Habitat Plan confirms that the Project will impact only . 087 acres of intermittent drainage. Compensation for affected habitats will be accomplished on an "acre-for-acre", "value-for-value" basis to result in "no net loss of in-kind habitat value. " Implementation of the Project mitigation plans will result in development of 3 . 00 acres of new aquatic habitat, a net gain of 2 . 13 acres; and the development of 74 . 5 acres of new woodlands, a net gain of 50 acres. The Resource/Habitat Plan contains a monitoring program which will inspect the on-going mitigation program for 5 years. The grading plan for the Project reduces grading from the WSP plan, reducing impacts on creek channels and 42 habitat. The Project also incorporates fewer creek crossings than anticipated in the WSP. The Resource/ Habitat Plan includes specific designs for structures that minimize impacts on creek channels. (See Resource/Habitat Plan at pp. 21-23 . ) Impacts to creek channels and associated riparian corridors at the road crossings are also addressed. The Resource/Habitat Plan confirms that reforestation and development of new habitat will mitigate Project impacts. The SEIR mitigation measure above regarding landslide repair techniques has been incorporated into the Project through the Project landslide repair plans and Conditions of Approval. C. Findings: Based upon the SEIR and the entire . record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts regarding creek corridors and habitat have been avoided or substantially lessened. The Resource/Habitat Plan and Landslide Repair Plans have been incorporated into the Project through the conditions of approval. These plans will ensure that the impacts are addressed. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 41. Impact: The proposed project would require exceptions from the County's creek setback requirements. While the County has indicated that the conceptual proposal appears to be appropriate, specific building envelopes need to be established to ensure that minimal impacts on creek corridors would result. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) Creek setbacks on the 52 lots otherwise requiring exceptions from the County ordinance should be reviewed at the tentative map approval stage or possibly on an individual basis by Contra Costa County to confirm that an appropriate building envelope can be established for each lot. Building envelopes should be established for each of the 52 lots and approved by the County prior to approval of the project's final subdivision map. See also Condition 30. F. b. Facts: A Creek Setback Analysis was prepared for the Project by Harlan Tait Associates and Aliquot Engineering to review the Project's compliance with County setback requirements. Exceptions from County requirements are needed in areas where a setback line is proposed which varies from the line established by the County Ordinance criteria. The Project contains 52 lots whereon exceptions may be needed. The Creek Setback Analysis concluded that a reasonable building envelope consistent with the goals of the County's setback provision could be established on each of the 52 lots. 43 C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts regarding exceptions to County setback requirements have been avoided or substantially lessened. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 42 . Impact: The proposed project would require an exception from County roadway standards for main loop road in areas where it would exceed a 15% slope. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) Redesign the proposed 20% roadway segments on the main loop road serving lots 133-135, 136- 141, 147-153 and 174-177 so that it does not require an exception to meet County "Collector" road standards. This change would create a road with a maximum gradient of 15%. See also Condition 49 . I. b. Facts: The roads have been redesigned to meet Public Works Department safety design concerns and still provide for roads that are sensitive to the hillside topography. Only a few exceptions to the 15% gradient are necessary where it is safe and provides for sensitive design in the professional opinion of the Public Works Department. C. Findings: Based upon the SEIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts regarding the 20% roadway segments have been avoided or substantially lessened. (2) Remaining Impacts No additional mitigation measures are necessary to reduce this impact to a level of insignificance. See Section C. 5.b(2) , on page 11, incorporated herein by reference. 43. Impact: The proposed project may require the use of explosives to aid in grading. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) If explosives are necessary to aid grading activities, a special permit from the San Ramon 44 Valley Fire Protection district (SRVFPD) will be obtained prior to any use of explosives on the project site. The permit application should identify the type of explosives to be used, where they would be stored, when they would be used and any other pertinent information deemed necessary by the SRVFPD. See also Condition 13 . b. Facts: This mitigation measure have been incorporated into the Project conditions of approval. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts from use . of explosives have been avoided or substantially lessened. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 44. Impact: The project may be potentially inconsistent with G.P. policies 10-28 (regarding decreased density as slope increases) and 10-29 (regarding development on slopes over 26%) . However, determination of the project's consistency or inconsistency with these policies is a matter of interpretation for the Board of Supervisors. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) If it is determined that the project with its proposed mitigation measures is inconsistent with policies 10-28 and 10-29, then alternative mitigation could be considered which could include redesigning the project to further minimize development and grading in areas over 26% slope, and to provide decreasing density as slope increases. b. Facts: (1) Background: The Safety Element of the County General Plan sets forth several policies which apply to the geologic impacts of the Project. A list of each of these policies is as follows: 10-2 ; 10-3 ; 10-8; 10-14 ; 10-22 ; 10-24 ; 10-26; 10-27 ; 10-28; 10- 29; 10-30; 10-31; and 10-32 . (2) Project Consistency: The SEIR finds the Project consistent with the above Policies as follows: (i) Policy 10-29 states that significant hillsides with slopes over 26% or more shall be considered unsuitable for types of development which require extensive grading or other land disturbance. The SEIR notes that because the Project involves grading over 26%, the Project could be "potentially inconsistent" with this Policy. However, as stated under the Aesthetics section above, at SEIR Impact 6 and incorporated herein, the Project complies with 45 this Policy. These policies require safe design on hillsides which is demonstrated in the soils and Geology section above. Grading on such hillsides is not prohibited by these policies. Opponents to the Project who have objected to it on such ground of inconsistency misinterpret the policies. (ii) Policy 10-28 states that residential density should decrease as slope increases, especially above a 15% slope. The Project design is consistent with this Policy in that it is a large lot, low density, yet clustered single family development. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project is consistent with County General Plan Safety Element Policies regarding geologic impacts of the Project, as referenced above. Specifically, the Project is consistent with Policy 10-29 and Policy 10-28 . No additional mitigation measures are necessary to limit this impact to a level of insignificance. Removal of homes or further limits on the development areas are not necessary under the General Plan or appropriate in light of PRC Section 21085 and Guidelines 15041. storm Drainage 45. Impact: As indicated in the WSP EIR, development in the Norris Canyon area under the WSP would result in an increase of approximately 26 cubic feet per second (cfs) in peak flows in San Catanio Creek. This would represent an increase of approximately 2 . 5% in existing peak flows. Runoff within the San Catanio watershed is expected to increase with total build-out of the Norris Canyon area from 109 acre feet to 112 acre feet annually (WSP EIR, Table 27 , page 4 . 8 . 21) . However, the proposed project includes a storm drainage detention basin which would significantly reduce storm water runoff from the site. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, set forth below. (2) Additional Mitigation Measures (a) Prior to filing a final subdivision map, pay the appropriate storm drainage impact fees as determined by the Contra Costa County Flood Control District. These fees shall not exceed $0. 35 per square foot of impervious surface created by the proposed project. (b) Use of the proposed detention basin for non- flood control measures (i.e. , recreation) should not be allowed unless it can be demonstrated that liability, maintenance and aesthetic concerns can be satisfactorily resolved. See also Condition 3 . C. b. Facts: The WSP EIR determined that the peak flows within San Catanio Creek basin would be increased approximately 26 Cfs (Cubic feet per second) by the construction of the Norris Canyon Road sub-area. In order to mitigate this additional flow during a 100 year storm of 3 hour duration, a drainage basin is proposed. The WSP EIR at 46 4 . 8-1 referenced the drainage element of the WSP, which proposed the construction of detention basins to reduce post-Project peak flood flows to existing conditions. The Project incorporates this measure by proposing to construct a 23 acre-foot detention basin along an existing seasonal creek centrally located within the Project. The basin will have the ability to reduce Peak 100 year Storm Flows at the basin from 416. 0 Cfs inflow to 123 Cfs outflow. This approximate reduction of 300 Cfs will significantly reduce the current Peak Flows and far exceeds the mitigation requirement of 26 Cfs reduction. The proposed detention basin would significantly reduce increases in storm water runoff from development of the Project site. The hydrologic analysis indicates that the detention basin would reduce peak flows by as much as 200 Cfs. The detention basin will further reduce peak flows in San Catanio Creek at the project site outfall from existing conditions by more than 30 percent. The SEIR proposes the above two mitigation measures in addition to the drainage basin to ensure that the project conforms with the Contra Costa County General Plan Policy regarding fees for creation of impervious surfaces. These mitigation measures have been included in the Project Conditions of Approval. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened Project impacts resulting from increase in peak flows in San Catanio Creek are avoided or significantly lessened by incorporation of a detention basin into the Project, by ensuring proper storm drainage impact fees are paid, and restricting use of the detention basin. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. 46. Impact: As identified in the WSP EIR, the proposed project would result in an increase in urban runoff water pollutants from homes and roadways located within the proposed project. Urban pollutants from the proposed project would enter the proposed local drainage facilities. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) A regular street sweeping program should be provided to reduce urban pollutants from entering the storm water runoff. The street sweeping program should be funded through the Homeowners Funded Maintenance District to be formed by the project to fund the maintenance of drainage facilities. b. Facts: The WSP EIR sets forth mitigation measure 4 . 8-5, which states that potential increases in urban runoff can be partially mitigated by a regular street sweeping program. This mitigation is also proposed by the SEIR, 47 above, and has been incorporated into the Project through a condition of approval. Conditions of approval specifying sediment traps, revegetation, and siltation control will also reduce surface runoff pollutants, particularly during the grading and installation of the Project infrastructure prior to completion of the reseeding and reforestation measures. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or substantially Lessened Project impacts resulting from increase in urban runoff water pollutants will be avoided or substantially lessened through use of a regular street sweeping program, and Project conditions of approval specifying sediment traps, revegetation, and siltation control. No additional mitigation is necessary. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 47. Impact: Maintenance of the proposed detention basin and drainage facilities could be costly for the County Public Works Department and Flood Control District. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) The Contra Costa County Flood Control District should work with the project applicant and other relevant agencies to determine the appropriate funding and responsibilities for maintenance of the project's storm drainage facilities prior to approval of the project's final subdivision map. See also Condition 15. b. Facts: With regard to the Project, maintenance of the proposed detention facility and on-site drainage improvement will be provided and funded through the formation of a maintenance assessment district as part of the Geologic Hazards Abatement District (GHAD) composed of the 371 privately owned lots within the Project. The proposed district will provide a long-term funding source and be responsible for the maintenance of the detention facility. The district will also provide the County Public Works Department and the City of San Ramon with yearly plans regarding the district's activities and budget. Creation of the GHAD has been incorporated into the Project through conditions. of approval. See also Condition 15. C. Findings: Based upon the SEIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened Project impacts with regard to maintenance responsibilities for drainage facilities have been avoided or significantly lessened by the requirement of the creation of a GHAD. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. 48 (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 48. Impact: Storm Drainage Consistency With General Plan Policies a. Background: With regard to storm drainage, the SEIR identified the following County General Plan Policies from the Public Facilities/Services Section: Policy 7-45: New development should be required to finance its legal share of drainage improvements. Policy 7-46: On-site water control shall be required to reduce peak flows. Policy 7-51: Public access to watercourses shall be required when liability and security issues can be resolved. Policy 7-52 : Detention basins shall be designed for multiple use such as parks, etc. if liability issues can be resolved. b. Facts: The SEIR confirms at p. 3-44 that the Project is generally consistent with the above Policies. The Project would provide its fair share of the cost of drainage improvements, and provide on-site water control (detention basin) . The Project provides for construction of the detention facility in the public park area, provided that liability, etc. , can be resolved. The Project would be subject to the $0. 35 per square foot fee. C. Findings: The Board finds that the Project is generally consistent with the General Plan Policies regarding storm drainage for reasons set forth above. Water Water Impacts/Mitigation Measures Identified in the WSP/EIR 49. WSP Impact: Development of the WSP area would require annexation of the area to EBMUD. a. WSP EIR Mitigation Measures: (1) The WSP EIR at mitigation measure 4 . 11-14 states that all developed area outside of the current service boundary for EBMUD shall be processed through LAFCO. (2) Mitigation measure 4 . 11-15 requires that development within higher elevation than those served by existing pressure zones shall be responsible for cost of constructing major facilities through the System Capacity Charge (SCC) . (3) Mitigation measure 4 . 11-16 requires that the SCC would be imposed by EBMUD pursuant to its regulations. (4) Mitigation measure 4 . 11-17 requires that new development pay all applicable fees for provision of water service. 49 b. Facts• (1) Facts regarding mitigation measure 4 . 11-14 , above: The Board has submitted a Resolution of Application to the Contra Costa County LAFCO. Annexation is a condition of project approval. Annexation is requested into EBMUD, CCCSD, and County Lighting District L-100. See discussion under SEIR Water, Impact 1, Facts, below. (2) Facts regarding mitigation measures 4 . 11-15 through 4 . 11- 17, above: A preliminary utility plan that outlines the water supply and storage system for the proposed project was submitted and evaluated through the SEIR and Project review. Conditions 3 .K. requires SRVRPC review of watertank details to confirm mitigation of visual impacts. Final design level review of the water delivery .system will require review and approval by EBMUD. There is no evidence to suggest that there is any physical or technical impairment to the delivery of water by EBMUD to this site an its homes and common facilities. C. Findings: The Project impact regarding the requirement to annex to EBMUD is avoided or substantially lessened, with incorporation of these mitigation measures, and the mitigation measures set forth in the SEIR for Water as set forth below. The Project impacts have been avoided or substantially lessened for the reasons set forth under SEIR Impacts Water, Impact 1, Facts, below. See also Section 50.C(2) , incorporated herein by reference. Water Impacts/Mitigation Measures Identified in the SEIR The impacts of the Project with regard to water issues are set forth in the SEIR at pages 3-16 to 3-36. 50. Impact: The project site is not currently within an existing water service district. It appears that EBMUD would provide the most practical and feasible method of obtaining water service for the project. Annexation and extension of a 12" main to the project site (EBMUD size requirement) would be required. The 12" line is large enough to provide water service to other sites, which could create a growth inducing impact. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) LAFCO will evaluate the situation and make the determination regarding annexation of the project site into EBMUD. Project consistency with the identified General Plan policies, EBMUD's policies and environmental impacts will be evaluated as a part of the decision. See also Condition 9 and Advisory Note L. (b) Prior to recording a final map, evidence should be provided that the project has been annexed into EBMUD consistent with Water Service Policy 7-21 and Water Service Implementation Measure 7-i. See also Condition 9 . (c) If the project is annexed to EBMUD, the District should evaluate their Ultimate Service boundaries, standards and the project's water supply requirements to determine how to design 50 the water line extension without providing capacity for lands that are not anticipated for development. A design that limits future connections unrelated to the project would mitigate any incremental growth inducing impact of the project. b. Facts: No primary public water lines or wells exist within the Project site or the immediately surrounding areas. The nearest existing line is a 12-inch EBMUD water main 1. 5 miles from the site, in the San Ramon area. EBMUD is the closest and most logical water provider. DSRSD and Zone 7 are too remote and delivery of service from those providers is technically infeasible. Zone 7 does not ordinarily service Contra Costa areas. The Board has applied to the Contra Costa County LAFCO to evaluate and approve three annexations as part of one boundary reorganization, including the subject annexation into EBMUD. Upon request of Contra Costa County, the Alameda LAFCO transferred jurisdiction over the EBMUD annexation to the Contra Costa LAFCO (Norris Canyon Area Boundary Reorganization) . The Contra Costa LAFCO has policies for evaluating requests for changes to water boundaries. These policies generally require an evaluation of timeliness, efficiency of service and environmental review. The SEIR and through this planning process the County evaluated several alternative means of supplying the project with water, including utilization of EBMUD. The SEIR noted EBMUD's Policy 52 , which states in part that annexation of an area outside EBMUD's ultimate service boundary will only be considered by EBMUD if it represents the most practical and feasible method of obtaining service and the acceptable level of average demand is not exceeded. Other provisions of Policy 52 may not be satisfied here. EBMUD's acceptable maximum level of average demand of projected and planned water supply is currently being developed as part of the District's Water Supply Management Program (WSMP) . The draft SEIR summarized EBMUD's circumstances regarding its water supply, and the WSMP, at p. 3-24 through 3-28 and at p. 3-32 through 3- 36, and in other additional information provided subsequently by EBMUD and the applicant. That additional information is also utilized by the Board to determine whether its General Plan water services policies are being satisfied. The SEIR and the Board through sufficient evidence in the record have concluded that EBMUD is the logical provider of water for the site, and would provide the most practical and feasible method of obtaining service, and that EBMUD has adequate capacity to serve the Project. To serve the additional residences, EBMUD would provide approximately 277 , 500 gallons of water per day (the actual use would be much lower during a drought when landscape watering may be substantially reduced or eliminated through voluntary or mandatory WSP restrictions; see prior EBMUD restrictions as examples) . This figure constitutes only 0. 12% ( . 001156) of the District's 240 mgd total delivery capacity; and only 0. 130 ( . 00129) of the District's 215 mgd actual water demand. The SEIR noted that EBMUD's Policy 52 states 51 the District's policy to review and report on adequacy of the District's water supplies when considering case by case decisions on requests for replacement supplies "which increase the average annual demand by one percent (1. 0%) ". The SEIR and other information in the record have confirmed that once annexed, the Project's demand would not be considered consequential. Providing water to this Project as a relatively small user, even during times of drought and with reduced water supplies, will have a less than significant impact on existing EBMUD customers. Cumulative impacts are more fully discussed in Attachment 2 to this Exhibit. The County General Plan addresses water service issues in its Growth Management Program and the Public Facilities/Services Element. The Growth Management performance standard is set forth in the General Plan at p. 4-11. Generally, it requires the County to require new development to timely demonstrate that adequate water quality and quantity can be provided. It does not require adequate water service to be verified at this early project approval stage, rather at the final subdivision or similar approval stage in the process. EBMUD misinterprets the General Plan. This standard is also set forth in Policy 7-21 and Implementation Measure 7-i. The SEIR concluded that at this time there is sufficient evidence to find that EBMUD has a sufficient water supply capacity to serve the Project consistent with the General Plan standards. Compliance with the General Plan standards is more fully set forth in Attachment 2 to this Exhibit. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened All three of the above mitigation measures are incorporated into the Project. Mitigation measures 4 . 11-14 through 4 . 11-17 set forth in the SEIR are also incorporated into the Project. With such mitigation measures, the Conditions of Approval and the limited amount of water use by this Project in the context of EBMUD's entire water demand and supply, even under EBMUD's worst case scenario, the Project impacts regarding the requirement to annex to a water district or otherwise obtain water have been avoided or substantially lessened. EBMUD is the logical water provider. EBMUD has adequate short-term and long-term capacity to provide the limited amount of water necessary for the Project. The Project is consistent with the County growth management performance standards: (1) there is sufficient evidence that capacity exists within the water system for the Project; and (2) the applicant will fund the necessary installation of utilities. Drought-related use restrictions will further reduce and mitigate water use by this Project. With regard to EBMUD's Policy 52 , the Board finds that EBMUD represents the most practical and feasible method of obtaining service, and the acceptable minimum level of average demand is not exceeded and that it is not otherwise bound to follow EBMUD's annexation policies and its unilaterally created Ultimate Service Boundary. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. 52 (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to any impact on EBMUD's existing and future water supply and its ability to service customers within its boundaries. 51. Impact: The project would use a maximum of approximately 277, 500 gallons of water per day. This is 0. 12% ( . 001156) of the District's 240 mgd total delivery capacity and the very small percentage 0. 13% ( . 00129) of the District's 215 mgd actual water demand as determined in the SEIR. Using the District's worst case figures this use represents a comparable percentage use of total delivery capacity and of total demand. Moreover, in the worst case water use by the project will be substantiallycurtailed by voluntary or mandatory restrictions. Once annexed, the project's demand would not be considered consequential (more than 1% of average annual demand) . Based on anticipated demand increases (0. 18% per year) in the SEIR or by EBMUD in some of its later information, water supply should be available to the project over the ten year build-out process. a. Mitigation: (1) Measures Incorporated into the Project (See discussion under Facts, below) (2) Additional Mitigation Measures (a) Prior to recording a final map, there should be verification or assurance of water service through a Pipeline Extension Agreement or other means for the units to be constructed based on building permits. See also Condition 9 . b. Facts• See discussion under Facts for Impact 1, above and Attachment 2 . The Project incorporates the above mitigation measure in Condition 9. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened See Findings made under Impact 1, above. The above mitigation measure is added to such Findings. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference. 52. Impact: Consistency with General Plan Policies. a. Background: The General Plan sets forth Water Service Policies in its Public Facilities/Services Element. The SEIR identifies Polices applicable to the Project are more fully explained in Attachment 2 . b. Findings: The Board finds that the Project is consistent with the General Plan Policies as set forth above, for the reasons set forth in Attachment 2 to this Exhibit. 53 Fire Protection Fire Protection Impacts/Mitigation Measures Identified in the WSP EIR 53. WSP Impact(s) : Development of this site would increase demand for fire protection and create a need for additional firefighting personnel; additional fire station; and additional firefighting equipment. a. WSP EIR Mitigation Measures: The WSP EIR sets forth the following three mitigation measures to address the above impacts: (1) 4 . 11-1: Five additional firefighting personnel positions shall be created and an engine meeting the requirements of the Fire District for the Westside shall be purchased. (2) 4 . 11-2 : Projects shall comply with the Uniform Fire Code and Uniform Building Code. (3) 4 . 11-3 : Provision shall be made for projects to include the following fire protection measures: fire sprinkler systems, heat and smoke detection system, adequate fire flows, approved access roads, weed abatement programs, and fire resistive vegetation. b. Facts: The Project will provide 371 units that could potentially contain 925 residents based on the County per unit average household size. This is slightly less than the one firefighter per every 1, 000 new residents standard. (4 . 11-1) The Project shall be required to comply with the Uniform Fire Code and Uniform Building Code as part of the approval process prior to construction. (4 . 11-2) The Project Conditions of Approval require the provisions set forth in measure 4 . 11-3 . In addition, the applicant has met with the San Ramon Valley Fire Protection District and agreed to incorporate additional mitigation measures in the project. See discussion under SEIR Fire Protection Impacts, Impact 1, Facts, below. C. Findings: The Project impacts regarding fire protection have been avoided or substantially lessened by incorporation of the listed mitigation measures, and the additional mitigation measures set forth under SEIR Fire Protection Impacts, set forth below. Fire Protection Impacts/Mitigation Measures Identified in the SEIR The impacts of the Project with relation to fire protection issues is set forth in the SEIR at pages 3-36 to 3-39. 54. Impact: The San Ramon Valley Fire Protection District (SRVFPD) was contacted regarding the fire safety aspects of the proposed project. The SRVFPD reviewed the proposed project with respect to fire safety issues related to hillside development which were brought to light by the 1991 Oakland hills fire and has set forth specific mitigation measures as listed in Section 3 . 2 . 2 of this SEIR. 54 a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) The fire protection measures and project design features proposed by the San Ramon Valley Fire Protection District should be incorporated into the project design prior to approval of the final subdivision map and as conditions of project approval. See also Conditions 3 . I. , and 31. b. Facts: The San Ramon Valley Fire Protection District (SRVFPD) was contacted regarding fire safety aspects of the Project. The SRVFPD reviewed the Project with respect to fire safety issues related to hillside development which arose from the 1991 Oakland hills fire. the SRVFPD recommended several measures to reduce potential fire hazards, as set forth in the SEIR at pp.3- 36 through 3-37. These measures have been incorporated into the Project condition of approvals. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: The Project impacts regarding fire protection have been avoided or substantially lessened by incorporation of the mitigation measures set forth in the WSP EIR, above, the mitigation measures recommended by the SRVRPD as referenced above and the Conditions of Approval. (1) Impacts Avoided or Substantially Lessened The Project impacts regarding need for fire protection have been avoided or substantially lessened by inclusion of the above mitigation measure in the Project conditions of approval. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 55. Impact: Consistency with County General Plan Policies. a. Background: The SEIR states that the County General Plan, Public Facilities/Services Element sets forth several Policies which are applicable to the Project, as follows: (1) Policy 7-65: New development shall pay its fair share of costs of new fire protection. The Conditions of Approval and mitigation measures incorporate this requirement. (2) Policy 7-66: Needed upgrades for fire facilities and equipment shall be identified as part of Project environmental review. The Project received this type of review. The SRVRPD determined that no upgraded facilities or equipment are required to serve this Project. 55 (3) Policy 7-67 : Sprinkler systems may be required. The Project complies with this policy, by the applicants agreement to require five sprinklers in every home. (4) Policy 7-72 : Special fire protection requirements for hillsides shall be developed. The Project has incorporated the SRVRPD recommendations for hillsides, including adequate access. (5) Policy 7-74 : Fire equipment access shall be provided to open space areas. The Project has incorporated open space access for fire equipment, through emergency vehicle access. (6) Policy 7-82 : All structures located in Hazardous Fire Areas shall be constructed with fire-resistant materials, etc. The Project has incorporated these requirements. (7) Policy 7-62 : The County shall strive to have fire stations located within one and one-half miles of development in urban, suburban and central business areas. An alternative to this policy is the provision of fire sprinklers as provided in this Project, pursuant to Policy 7-66. b. Findings: The Project is consistent with County General Plan Policies regarding fire protection for the reasons set forth above. Public Protection Public Protection Impacts/Mitigation Measures set forth in the WSP/EIR 56. WSP Impact: New development under the Specific Plan will cause an increased need for police protection services. a. WSP EIR Mitigation Measures: (1) The WSP EIR at mitigation measure 4 . 11-12 states that addition of five officers, two patrol vehicles, and staff support for a fifth beat forth the San Ramon Police Department will provide a response time of four to six minutes for "priority 1" calls for the Westside. (2) The WSP EIR at mitigation measure 4 . 11-13 requires incorporation of police department recommendations regarding design aspects of development that affect traffic safety and crime prevention. b. Facts: The significant impact identified in the WSP EIR relates to the entire westside buildout. The Norris Canyon Road sub-area of the Westside currently has primary police protection supplied by the Contra Costa County Sheriff's Department. This police protection will continue after construction of the Project. Should the Project be annexed into the City of San Ramon, then the City will supply primary police services. Discussions with the Sheriffs department has revealed conflicting General Plan related service standards. However, the 56 Project applicant has agreed to participate in an appropriate program should the Sheriff's Department determine the Project impacts warrant mitigation. On-going funding for police protection by the County or the City will be from the tax dollars generated by the County's property tax assessment. C. Findings: The Project impacts regarding police protection have been avoided or substantially lessened. Public Protection Impacts/Mitigation Measures set forth in the SEIR The impacts of the Project with relation to public protection issues is set forth in the SEIR at pages 3-39 to 3-40. 57. Impact: The proposed project would result in the development of 371 single-family residences on the project site. The addition of these residences to the County would have an incremental impact on the need for additional public protection services. However, residential projects of this nature, large single family homes in a rural setting, generally do not place significant demands on public protection services. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) The Contra Costa County Sheriff's Department should determine an appropriate fee to be paid to the Sheriff's Department by the project applicant to comply with the facility standards policy of 155 square feet per 1, 000 residents. The facility standards "fee", if appropriate, should be paid upon issuance of building permits for the project. b. Facts: The Conditions of Approval incorporate this mitigation measure. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts regarding need for public protection have been avoided or substantially lessened by inclusion of the above mitigation measures in the Project and its Conditions of Approval. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. Treated Wastewater and Sewage Disposal Treated Wastewater and Sewage Disposal Impacts/Mitigation Measures Identified in the WSP EIR 58. WSP Impacts: (1) A portion of the site is not within the sphere of influence of the CCCSD; (2) the project would 57 increase Average Dry Weather wastewater flow to CCCSD facilities by 135, 000 gpd. , existing sewer mains would need to be upgraded to serve development under the Specific Plan; (3) pump stations would be necessary to serve some areas of the Westside. a. WSP EIR Mitigation Measures: 4 . 11-4 : The contributing watershed in the northern portion of the Westside shall be annexed to the CCCSD. 4 . 11-6: Fees shall be paid to CCCSD to cover any required upsizing; sewer mains shall be extended on Norris Canyon Road; 4. 11-7 : Existing capacity and improvement to CCCSDs' existing facilities required as a result of new development will be funded from applicable district fees and charges. b. Facts: The applicant has filed an application to annex the Project into the CCCSD. The Board of Supervisors has submitted the Resolution of Application to LAFCO. CCCSD has responded by letter (dated April 1, 1991) stating a sewer capacity study verifies the ability to serve. (4 . 11-4) The SEIR confirms that CCCSD is the logical provider for sewer service. Responsibility for changing the CCCSD's Sphere of Influence lies with the LAFCO. The proposed Project would generate an average dry weather flow of 111, 000 gallons per day (gpd) based on an average of 3000 gpd/unit. The applicant will construct the on and off-site sewer mains as part of the Project infrastructure. This work would be to CCCSD standards. Based on CCCSD's review of the existing sewer line capacity off-site, CCCSD has state upsizing of existing mains would not be necessary. The Project conditions of approval require the applicant to pay applicable sewer capacity fees. (4 . 11-6, 4 . 11-7) The WSP EIR confirmed that the use of pump stations within proposed development of this area is strongly discouraged by the CCCSD. The District requires that all other forms of conveying flow be examined before presenting the option of pumping. The SEIR confirmed that the sewer system would operate under gravity flow, no pumping would be required. C. Findings: The Project impacts regarding annexation to CCCSD; upgrading CCCSD and other facilities; and use of a pump station have been avoided or substantially lessened by incorporation of mitigation measures set forth in the WSP EIR as stated above. The mitigation measure regarding pump station is rejected at this time as being unnecessary for the reasons stated above. Treated Wastewater and Sewage Disposal Impacts/Mitigation Measures Identified in the SEIR The impact of the Project with relation to treated wastewater and sewage disposal issues is set forth in the SEIR at pages 3-45 to 3-49. 59. Impact: The proposed project would generate an average dry weather flow of 111, 300 gallons per day (gpd) based on an average of 300 gpd/unit. The proposed project would include off-site sewer improvements including extension of the 58 existing CCCSD mains located at Norris Canyon and Bollinger Canyon Roads, along Norris Canyon Road to the project site. a. Mitigation: (1) Measures Incorporated into the Proiect See mitigation measures set forth in the WSP EIR, above. All have been incorporated into the Project. (2) Additional Mitigation Measures No additional mitigation measures are necessary. b. Facts: See WSP EIR Treated Wastewater Impacts, Impact 1, Facts, set forth above. The SEIR confirmed that with adoption of the WSP EIR mitigation measures, no additional mitigation measures are necessary. C. Findings: Based upon the SEIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts regarding annexation to CCCSD; upgrading CCCSD and other facilities; and use of a pump station have been avoided or substantially lessened by incorporation of mitigation measures set forth in the WSP EIR as stated above. The mitigation measure regarding pump station is rejected at this time as being unnecessary for the reasons stated above. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. 60. Impact: The project site is not located within an existing sewer district and would have to be annexed before service could be provided to the site. There are two sewer districts in the general area of the project site (Central Contra Costa Sanitary District (CCCSD) and the Dublin San Ramon Services District (DSRSD) ) . CCCSD is the closest to the project site and would be the logical provider. a. Mitigation: (1) Measures Incorporated into the Project See mitigation measure set forth under WSP EIR for sewer service set forth above. (2) Additional Mitigation Measures No additional mitigation measures are necessary. b. Facts: See WSP EIR Impacts, Facts, set forth above. The SEIR confirmed that with adoption of the WSP EIR mitigation measures, no additional mitigation measures are necessary. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts regarding annexation to CCCSD; upgrading CCCSD and other facilities; and use of a pump station have been avoided or substantially lessened by incorporation of mitigation measures set forth in the WSP EIR as stated above. The mitigation measure regarding pump station is 59 rejected at this time as being unnecessary for the reasons stated above. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. 61. Impact 3 . Compliance with County General Plan Policies. a. Background: The County General Plan Growth Management performance standard for sanitary sewer at p.4-11 generally requires that the County shall require new development to demonstrate that adequate sewer quantity and quality exist prior to approval. As stated above, the CCCSD has indicated capacity and ability to serve. The County General Plan Policies applicable to the Project are found in the Public Facilities/Services Element, as follows: (1) Policy 7-31: Urban development shall be encouraged within the sewer Sphere of Influence; expansion should be restricted to areas where development can meet growth standards. As stated, the County has confirmed growth standards can be met for provision of sewer service. (2) Policy 7-33 : The County shall require new development to demonstrate that adequate wastewater treatment can be provided. This is the adoption of the County Growth Management performance standard, addressed above. (3) Policy 7-37 : The need for sewer system shall be reduced by requirement incorporation of water conservation measures. The Project incorporates water conservation measures. The SEIR confirms that the Project is generally consistent with the Policies of the County General Plan. b. Findings: The Board finds that the Project is consistent with the standards and Policies of the County General Plan regarding sewer service, for the reasons set forth above. Park Land/Recreation/Open Space Park Land/Recreation/Open Space Impacts/Mitigation Measures Identified in the WSP EIR 62. WSP Impact: Development under the WSP will result in a demand for an additional 32 acres of public parks. a. WSP EIR Mitigation Measures: 4 . 11-10: Create Neighborhood and community park areas within the Westside to serve new residents and the City of San Ramon, and meet the San Ramon General Plan Standards. 4 . 11-11: Provide dedications of new parkland area and/or payment of parkland dedication fees. b. Facts: The Project contains an 8 . 8 acre neighborhood park site to be constructed by the developer. The City of San Ramon parkland standard of 4 . 5 acres per 1, 000 60 persons has been met. (See further discussion under SEIR Park Impacts, Impact 1, Facts, below) . C. Findings: The Project impact regarding adequate parkland has been avoided or substantially lessened by adoption of the above mitigation measures, as explained under SEIR Park Impacts, Impact 1, Facts, below. Park Land/Recreation/Open Space Impacts/Mitigation Measures Identified in the SEIR The impact of the Project with relation to park land, recreation and open space issues is set forth in the SEIR at pages 3-49 to 3- 57 . 63. Impact: The proposed project includes an 8 . 8 acre community park to be developed in the center of the project site. The park would be considered a "Neighborhood Park" and would exceed the County park criteria of providing 3 . 0 acres per 1, 000 residents. a. Mitigation: (1) Measures Incorporated into the Project The WSP EIR mitigation measures referenced above have been incorporated into the Project. (2) Additional Mitigation Measures (a) Prior to tentative map approval, the applicant should obtain a response from the Public Works Department on the feasibility of allowing active or passive recreation activity within the proposed detention basin. The review should provide for a preliminary landscape/ irrigation plan including identification of the location and design of any proposed fencing, and the assignment of any liability and maintenance responsibility. See also Condition 3.J. b. Facts: The WSP EIR mitigation measures, and the above mitigation measure, have been incorporated into the Project. The park area has been expanded from 5 to 8.8 acres with additional recreation amenities. The park would be considered a "Neighborhood Park", and would exceed the County Park standards of providing 3 . 00 acres per 1, 000 residents. A portion of the park would also be utilized for the storm water detention basin. This would be consistent with County policy regarding detention basins which promote multiple use of detention facilities. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts regarding providing adequate park lands have been avoided or substantially lessened; the 8 . 8 acre park meets all County standards. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 61 64. Impact: The project would contain approximately 854 acres of homeowner's association owned and privately owned, deed- restricted agricultural and open space and public open space. The project would include a range management program. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) Consider dedication of the 673 acres of privately owned agricultural/open space to the East Bay Regional Parks District as an expansion of the adjacent Bishop Ranch Regional Open Space. See also Condition 4 . (b) A scenic easement over all privately owned agricultural/open space area could be dedicated to the County. See also Condition 3 .M. and 21. (c) A range management report should be prepared yearly and submitted to the County Agricultural Commissioner for review. The yearly report should summarize the primary aspects of the prior years range management practices including but not limited to: residual dry matter on the ground in the fall; number of cattle or other livestock on the property; summary of plant composition; and the documentation of any pest infestations. b. Facts: The Project would result in a total of 673 acres of the Wiedemann Ranch property being restricted to agricultural, open space and restricted uses. The 673 acres will be restricted through a combination of a recorded restrictive covenant or servitude instrument, scenic easement and gifted public open space. The restrictions would set forth limits on future use and development consistent with Condition 3 .M. , 4 , and 21. A new Williamson Act contract will be placed on the 598 acres that is not publicly owned. An additional Williamson Act contract on the 673 will further . ensure that the agricultural lots will lands remain for agricultural open space and related uses. The applicants have prepared a Range Management Program, setting forth various range management practices for livestock production, conservation of plant and wildlife diversity and fire hazard reduction. The program provides a mechanism for periodic review by the County Agricultural Commissioner. The EBRPD finds the open space provision of the Project acceptable as modified consistent with direct discussion with District officials and have withdrawn any objections to the Project. Their letters of objection are withdrawn from the record at their request. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts regarding restriction of open space lands use have been avoided or substantially 62 b. Facts: The Project will be required to pay current SRVUSD school impact fees (estimated at $1, 750, 000 for the 371 units) . In addition, the SRVUSD would receive increased property tax reserves from the Project. The SEIR confirms that the school impact fees and increased property tax revenues would adequately mitigate enrollment impacts of the Project. C. Findings: The Board finds that the Project impact on school enrollment is avoided or substantially lessened. The school impact fees and increased property tax revenues would adequately mitigate enrollment impacts of the Project. School Impacts/Mitigation Measures Identified in the SEIR The impact of the Project with relation to school issues is set forth in the SEIR at pages 3-57 to 3-60. 67. Impact: According to school district's student generation factors, the proposed project would result in approximately 250 new student enrollments at SRVUSD schools. Students generated by the proposed project would impact local SRVUSD schools. Based on the current SRVUSD impact fees the proposed project is estimated to provide approximately $1, 750, 000. 00 to the school district from the 371 units. The SRVUSD would also receive increased property tax revenues from the project. a. Mitigation: (1) Measures Incorporated into the Project The WSP EIR mitigation measures set forth above are incorporated into the Project. (2) Additional Mitigation Measures No additional mitigation measures are necessary. b. Facts: See the WSP EIR School Impacts, Impact 1, Facts, above. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impact on school enrollment is avoided or substantially lessened. The school impact fees and increased property tax revenues would adequately mitigate enrollment impacts of the Project. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 68. Impact: Consistency with County General Plan standards and Policies a. Background: The SEIR identified the following County General Plan Policies (Public Facilities/Services Element) regarding schools: (1) Policy 7-141: The environmental review process shall monitor service. The SEIR performs such review. 64 (2) Policy 7-142 : The State classroom sizes shall be utilized These standards have been utilized. (3) Policy 7-146: Adequate provisions of schools shall be assured by coordinating review through the Growth Management Program and environmental review process. The Growth Management Program and environmental review process have been followed for the Project. b. Findings: The Board finds that the Project is consistent with the County standards and Policies for the reasons set forth above. Fiscal Fiscal Impacts/Mitigation Measures Identified in the SEIR The impact of the Project with relation to fiscal issues is set forth in the SEIR at pages 3-60 to 3-62 . 69. Impact: The project will place demands on certain public service (i.e. , police, schools, parks, etc. ) and utilities (i.e. , water, sewer, electricity, etc. ) . In general, the financial implication of a new development on public services and utilities is paid for out of development fees or charges, property tax revenues and service fees. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures No additional mitigation measures are necessary. b. Facts: The SEIR discusses fiscal impacts at p. 3-60. Generally, the SEIR states that public services and utilities would be provided by a wide range of local service providers, including the County, public utilities, and private service providers. The SEIR concludes that the Project would not have a significant fiscal impact on the County or the various service providers because the Project would pay certain development fees and would result in increased property tax revenues, which would provide a long-term funding source for various County services. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project fiscal impacts have been avoided or substantially lessened for the reasons set forth above. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference. 65 Plant and Animal Life Plant and Animal Life Impacts/mitigation Measures Identified in the WSP EIR 70. WSP Impact: The WSP EIR divided the Westside into Development Areas, and set forth impacts on plant and animal life within such areas. Project areas and impacts were set forth as follows: Development Area B: Potential impacts could result from the filling or sedimentation of two major creek drainages. Development Areas C & D: Potential impacts could result from tree removal and filling or damage to creeks. Development Areas E, G, H & I: Impacts could result from constructed related erosion and siltation, and water quality impacts from post construction runoff. Development Area F: Impacts potentially could result from construction-related erosion and siltation, and water quality impacts from post-construction runoff. In addition, removal of approximately seven acres of riparian habitat due to filling of one creek with dirt from the grading of the cross-valley ridge will have a significant impact on the riparian habitat. a. WSP EIR Mitigation Measures: The WSP EIR sets forth seven mitigation measures, 4 . 10-1 through 4 . 10-7 , which are set forth in the WSP EIR at pp. 4 . 10-16 and 4 . 10-17. b. Facts: The Project adopts through its design and through the conditions of approval each of the WSP EIR mitigation measures. The WSP EIR confirms that based on the implementation measures, the potential impacts would not be significant, except for Development area F. The WSP EIR Development Area F impacts were based on the conceptual grading plan reviewed in that document. That grading plan created the need to dispose of excess cut materials. As stated in these Findings, the Project grading plan substantially reduces grading and proposed to fill only a small portion of Development Area F. The reduced grading and filling, reforestation program, and other Project measures will reduce impacts in this area. C. Findings: The Project impacts as set forth above have been avoided or substantially lessened by the incorporation of the Project of all referenced WSP EIR mitigation measures, and the Project reduction of grading, and the Project reforestation program and other design features. Plant and Animal Life Impacts/Mitigation Measures Identified in the SEIR The impacts of the Project with relation to plant and animal life is set forth in the SEIR at pages 3-62 to 3-77 . 71. Impact: The proposed project would directly impact approximately 0. 87 acre of intermittent drainage channels. a. Mitigation: (1) Measures Incorporated into the Project All WSP EIR mitigation measures regarding intermittent drainage channels are incorporated into 66 the Project. To further mitigate this impact, the Project would include creation of approximately 3 . 00 acres of new wetland area. (2) Additional Mitigation Measures No additional mitigation measures are necessary. b. Facts: Biological surveys of the Project site were conducted in 1988 and 1989 as part of the WSP EIR. To provide supplemental information specific to the Project, the referenced Resource/Habitat Plan was prepared by Sugnet & Associates. The Resource/Habitat Plan confirmed the Project would impact only 0. 87 acres of intermittent drainage channels. To mitigate this impact, the Project includes creation of 3 . 00 new acres. Of this 3 . 00 acres, approximately 1. 58 acres would be seasonal and 1. 42 acres would be perennial aquatic habitat. The Resource/Habitat Plan shows the location of the aquatic habitat compensation sites. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts on intermittent drainage channels are avoided or substantially lessened for reasons set forth above. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 72 . Impact: The project would require fourteen crossings of drainage channels and wildlife corridors. a. Mitigation: (1) Measures Incorporated into the Project All WSP EIR mitigation measures regarding drainage crossings are incorporated into the Project.See discussion under Facts, below. (2) Additional Mitigation Measures No additional mitigation measures are necessary. b. Facts: The Resource/Habitat Plan sets forth specific drainage crossing design specifications to reduce impacts and to minimize corridor fragmentation through the use of clear spans and arch culverts where practical. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts on drainage crossings have been avoided or substantially lessened through the drainage crossing design specifications set forth above. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. 67 73. Impact: The proposed project would directly impact 1, 220 trees as a result of project infrastructure (roads, utilities, etc. ) . Construction activities could result in additional trees being adversely affected by damage to roots, trunks and canopies. a. Mitigation: (1) Measures Incorporated into the Project All WSP EIR mitigation measures regarding tree preservation have been incorporated into the Project. (2) Additional Mitigation Measures (a) To protect existing trees and vegetation in the Development Area during construction of the project the following measures should be incorporated into the Final Development Plans and Final Subdivision Plans: 1) During road construction and grading, heavy equipment should be restricted to the minimum area suitable for equipment operations. Short-cuts and stockpiling of material on otherwise undisturbed areas should be prohibited. 2) Tree trunks immediately adjacent to construction areas should be protected by fencing or other barriers to avoid physical damage. Protection should extend outside drip lines where feasible to prevent trunk, limb damage and soil compaction. 3) Where roots are covered with impervious surfaces, or roots are removed within the drip line, thinning of the tree crown should be conducted to compensate for lost root function. 4) A licensed arborist should be consulted to monitor construction and propose specific measures to protect vegetation outside of the construction zones. (b) To educate project residents about the long- term care of oaks and other native plan species present on the project site, an informational program, including written material, should be prepared and distributed to project residents. The focus of the informational program should be to educate residents about the special maintenance and care requirements of the native plant species present on the site. The informational program should be submitted to Contra Costa County for approval prior to completion of the first homes to be occupied. The information should be distributed to residents upon purchase of each home. See also Condition 17 . C. Facts: The above mitigation measures have been incorporated into the Project through the conditions of approval. The Resource/Habitat Plan includes a Reforestation Plan which includes the planting of approximately 6, 700 trees on the site covering approximately 74 . 5 acres. To ensure that proposed 68 reforestation and aquatic habitat replacement plans are implemented, the Resource/Habitat Plan further contains a monitoring program. The Project contains several other features designed to reduce impacts on plant and animal life, as summarized in the SEIR at p. 3-72 . d. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened Project impacts regarding trees have been avoided or substantially lessened by incorporation of all the mitigation measures as set forth above, by incorporation of Project features designed to minimize impacts, and by use of the Resource/Habitat Plan. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 74. Impact: The project may be potentially inconsistent with G.P. policies 8-6 and 8-14 regarding the preservation of trees, vegetation and development on slopes over 26%. However, determination of the project's consistency or inconsistency with these policies is a matter of interpretation for the Board of Supervisors. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) If it is determined that the project with its mitigation measures is potentially inconsistent with policies 8-6 and 8-14 , then alternative measures could be considered which could include redesigning the project to further minimize development on slopes over 26% and to provide for decreased removal of trees and vegetation. b. Facts: The General Plan sets forth Policies from the Conservation Element of the General Plan applicable to the Project as follows: (1) Policy 8-6: Significant trees, natural vegetation, and wildlife populations generally shall be preserved. The Project generally complies with this Policy. The Project will only affect 288 of the 1, 143 acre site. The Project will include drainage crossings designed to limit impacts on wildlife corridors. Impacted vegetation and trees would be replaced at a ratio of at least 3 to 1 . These and other referenced Project features ensure this Policy is followed. (2) Policy 8-7 : Important wildlife habitats and corridors shall be maintained. 69 The Project is consistent with this Policy for reasons set forth above. (3) Policy 8-9 : Areas containing significant resources or endangered species shall be maintained. The Project is consistent with this Policy through use of the Habitat/Resource Plan. Further, a live trapping program was performed which found no presence of the Alameda Whipsnake. No other rare, endangered or listed species have been identified on the Project site. (4) Policy 8-12 : Natural woodlands shall be preserved as possible. The Project is consistent with this Policy for reasons set forth above. The removal of some of the trees is required to locate roads and infrastructure on the Project site. (5) Policy 8-14 : Development on open hillsides, etc. , shall be restricted, and hillsides with a grade of over 26 percent shall be protected. The Project is consistent with this Policy for reasons set forth in the Aesthetics section of these Findings. Protection and restriction do not mean prohibition. (6) Policy 8-21: The planting of native trees shall be encouraged. The Project is consistent with this Policy through use of the Habitat/Resource Plan and for reasons set forth above. (7) Policy 8-28 : Protect the County's mature oak, bay and buckeye trees. The Project is consistent with this Policy through use of the Habitat/Resource Plan and for reasons set forth above. (8) Natural Watercourses shall be integrated into new development; existing native riparian habitat shall be preserved; on-site water control shall be required; restore habitat; setback from creek; grading should minimize impacts near watercourses; and revegetation should include native vegetation. (Policies 8-86 through 8-89 ; 8-91 through 8-92) . The SEIR confirms that the Project is consistent with Policies regarding natural watercourses. The Project would integrate existing watercourses into the Project design, allow public access, enhance riparian areas though reforestation efforts and provide adequate setbacks from existing creeks. The Project provides a minimized grading plan, and has on-site water controls (detention basin) . C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project is consistent with General Plan Policies regarding vegetation and wildlife and natural watercourses, as set forth above. Specifically, the 70 Project is consistent with Policy 8-6 through utilization of the Habitat/Resource Plan, and with Policy 8-14 , for reasons set forth in the Aesthetics section of these Findings. (See SEIR Aesthetics Impacts, Impact 6, Facts. ) No additional mitigation measures are necessary to reduce this impact to a level of insignificance. 75. Impact: The project site contains three small areas within the proposed development area (approximately nine acres) , and one larger tract outside the development area (approximately 49 acres) that are suitable for the Alameda Whipsnake, which is an animal species of special concern. a. Mitigation: (1) Measures Incorporated into the Project See discussion for Policy 8-9 , above. No Whipsnakes have been found on the site during extensive trapping in two separate programs. These nine acres are not habitat. The Department of Fish and Game requires no mitigation in light of the results of the trapping programs. b. Facts: Because no whipsnakes or endangered species have been found, no mitigation is necessary. C. Findings: Based upon the SEIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened Project impacts regarding the Alameda Whipsnake have been avoided or substantially lessened through the previous trapping program, and monitoring as set forth above. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. Noise Noise Impacts/Mitigation Measures Identified in the WSP EIR 76. WSP Impact: Cumulative growth in the area (without the Project) will increase the Ldn 4 decibels along Norris Canyon Road. With the implementation of the Specific Plan, Ldn noise levels could increase an additional 1 Db for a total of 5 decibels. Residential development within 1156 feet of the roadway would be exposed to Ldn noise levels exceeding 50Db. Existing homes within 50 feet of the roadway would be exposed to a significant impact. a. WSP EIR Mitigation Measure: 4 . 7-9 : Residential development is generally planned for greater than 50 feet from the roadway. However, if within 50 feet, noise control measures will be incorporated into the building's design. Where buildings will be located between outdoor use areas and the roadway, outdoor noise will be reduced to normally acceptable levels. Interior noise levels will be controlled to an Ldn of 45 Db through the use of sound- rated windows and walls. b. Facts: See SEIR Noise Impacts, Impact 1, Facts, below. The above mitigation measure has been incorporated into the Project. 71 C. Findings: The Board finds that the noise level impacts on residential development have been avoided or substantially lessened through use of the listed WSP EIR mitigation measure, and mitigation measures identified in the SEIR, for reasons set forth at SEIR Noise Impacts, Impact 1, Facts, below. 77. WSP Impact: Average noise levels along Norris Canyon Road would increase 4 decibels due to cumulative growth, and an additional 1 decibel due to Specific Plan implementation. There would be a significant cumulative impact. a. WSP EIR Mitigation Measure: 4 .7-3 : Residential development is also required to meet interior noise goals. . . An acoustical consultant should review the Project Plans to ensure that the Title 24 noise goals are met. b. Facts: See the SEIR Noise Impacts, Impact 1, Facts, below. This mitigation measure has been incorporated into the Project. C. Findings: The Board finds that the noise level impacts on residential development have been avoided or substantially lessened through use of the listed WSP EIR mitigation measure, and mitigation measures identified in the SEIR, for reasons set forth at SEIR Noise Impacts, Impact 1, Facts, below. 78. WSP Impact: Existing land uses located within the future 60 Ldn contour would be exposed to a significant increase in noise levels and will require that Project plans include mitigation. a. WSP EIR Mitigation Measure: 4 .7-10: Mitigating noise impacts on existing land uses could be achieved by the construction of noise barriers or berms. b. Facts: This mitigation measure has been incorporated into the Project. See SEIR Noise Impacts, Impact 1, Facts, below. C. Findings: The Board finds that the noise level impacts on existing land uses with the future 60 Ldn contour have been avoided or substantially lessened through use of the listed WSP EIR mitigation measure, and mitigation measures identified in the SEIR, for reasons set forth at SEIR Noise Impacts, Impact 1, Facts, below. Noise Impacts/Mitigation Measures Identified in the SEIR The impacts of the Project with relation to noise are set forth in the SEIR at pages 3-77 to 3-82 . 79. Impact: The project would contribute 1 decibel of the 5 decibel increase resulting from cumulative development. While the project specific noise impact would be minimal, the project would contribute to cumulative noise impacts along Norris Canyon Road. a. Mitigation• (1) Measures Incorporated into the Pro-iect See discussion under Facts, below. 72 I (2) Additional Mitigation Measures (a) The Wiedemann Ranch project should be required to pay a fee to the County, equal to its fair share of cumulative noise impacts, for the construction of noise barriers at the two identified sites. (The projects fair share should be equal to 20% of the total cost of the barriers (project contributes 1-decibel of 5-decibels under cumulative conditions = 20%) . The barriers should be installed before cumulative noise levels are reached. Installation of the barriers will be the responsibility of Contra Costa County and should be coordinated with the City of San Ramon. See also Conditions 3 .G. , and 41. (b) If explosives are necessary to aid grading activities, a special permit from the San Ramon Valley Fire Protection District (SRVFPD) will be obtained. b. Facts: The WSP EIR identified development on the Project site that would contribute to increases in future noise levels along Norris Canyon Road. Cumulative noise levels were identified in the WSP to increase by 5-decibels and increase the 60 Ldn contour from 52 to 117 feet from the centerline of Norris Canyon Road. Cumulative noise levels resulting from the Project site would constitute 1 of the 5 decibels. To supplement the noise analysis in the WSP EIR, Charles M. Salter associates conducted a review of noise impacts along Norris Canyon Road (Noise Study dated October 17 and November 21, 1991) . The SEIR concluded that while the Project specific noise impact would be minimal, the Project would contribute to cumulative noise impacts; therefore the Project should contribute its fair share, or 20% of the cost to mitigate future noise impacts along Norris Canyon Road. In fact, the Project will be required to pay for the entire cost of the soundwall and construct it now per Condition 41. The Noise Study identified to areas where cumulative noise level could be mitigated. The Noise Study recommends constructing a wood or masonry barrier which breaks the line-of-site from cars traveling on Norris Canyon Road to a standing receiver on the outside use space. See discussion in SEIR at p. 3-77 . With regard to use of explosives, the Geotechnical Feasibility Report for the Project indicates that blasting may be necessary to aid excavation in certain areas. The SEIR confirms noise impacts would not be considered significant, but recommends obtaining the referenced permit. The WSP EIR mitigation measures, and the above mitigation measures, have been incorporated into the Project conditions of approval. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: 73 I (1) Impacts Avoided or Substantially Lessened Project impacts regarding noise have been avoided or substantially lessened by incorporation of the WSP EIR and SEIR mitigation measures for the reasons set forth above. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 80. Impact: Consistency with County General Plan standards and Policies. a. Background: The County General Plan, Noise Element sets for two Policies applicable to the Project, as follows: (1) Policy 11-1: New Projects shall be required to meet acceptable noise level standards as established in the County Noise and Land Use Compatibility Guidelines. (2) Policy 11-4 : The County requires new single-family housing projects to provide for an interior Dnl of 45 dB or less. The SEIR confirms that Noise levels on the Project site would be within normally acceptable levels for single family residential development (CNEL of 60 dB or less) which would translate to an interior noise level of 45 dB or less in Project homes. Therefore, the noise environment on the Project site is compatible with the proposed land use. Existing homes along Norris Canyon Road will also be protected where necessary by sound walls. b. Findings: The Board finds that the Project is consistent with the referenced General Plan noise Policies, for reasons set forth above. Agricultural Issues Agricultural Impacts/Mitigation Measures Identified in the WSP EIR (See discussion under SEIR Agricultural Impacts, Impact 1, Facts, below. ) Agricultural Impacts/Mitigation Measures Identified in the SEIR The impacts of the Project with relation to agricultural issues is set forth in the SEIR at pages 3-82 to 3-87 . 81. Impact: The proposed project is requesting cancellation of the existing Williamson Act contracts on the properties. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) The decision regarding cancellation of the Williamson Act contracts on the property will be made by the Contra Costa County Board of Supervisors. 74 i (b) If cancellation is not granted, then the contract restrictions are scheduled to expire in any case. The restrictions on the Wiedemann property expires in 1995. The restrictions on the Christensen property expires in 1998 . b. Facts: (1) Conversion of agricultural land: The open space/agricultural issues associated with development of the Project site were addressed in the WSP EIR (Chapter 4 . 2) . The WSP EIR found that the Project would result in the direct loss of farmland, but that this impact would not be considered significant, because such farmland is not considered "prime" agricultural land. The Project area land is not considered "prime" because of steep slopes, rough terrain and relatively less fertile soil present on the Project site. The SEIR further recognizes that the Project projects the vast majority of Project lands for agricultural and related open space uses. (2) Williamson Act Cancellation Issues: The WSP EIR and the SEIR set forth the specific findings necessary to cancel the Williamson Act contracts on the subject property. The SEIR confirms that even if the Williamson Act contracts were not cancelled, the vast majority of the property would be free of the contract by 1995, and the remaining would be free in 1998 . The SEIR recognizes that the decision to cancel the Williamson Act is made by the Board, and that the Board has the responsibility to make the findings required. The Board has made the decision to cancel and the necessary findings. The SEIR references the applicant's letter submitted as part of the SEIR process, which outline's the Project's justification for cancellation of the Williamson Act projects. The letter is summarized at p. 3-85 of the SEIR. See also Williamson Act Findings attached to Board Order as Exhibit H, incorporated herein by reference. C. Findings: Based upon the Final EIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened The Project impacts related to conversion of agricultural land and cancellation of the Williamson Act have been avoided or substantially lessened. The Project lands are not considered prime agricultural lands. The Williamson Act contracts will in any event run out in 1995 and 1998 . Under the Project, the vast majority of Project lands will remain in agricultural or related open space use. The Board must separately make the required Williamson Act findings for contract cancellation. The Board recognizes and adopts the justification for cancellation as outlined in the Exhibit H. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. 75 (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to this impact. 82. Impact: The project would be surrounded by agricultural activities which may result in nuisances and hazards for project residents. a. Mitigation: (1) Measures Incorporated into the Project See discussion under Facts, below. (2) Additional Mitigation Measures (a) Homeowners should be made fully aware through a sales disclosure statement that they are in close proximity to existing agricultural activities which may result in nuisances and hazards. In addition, the project applicant should prepare an informational booklet to be distributed to project residents upon purchase describing the adjacent agricultural activities, potential hazards and ways for residents to minimize potential hazards including appropriate behavior when using the adjacent trails and open space areas. The informational booklet should be submitted to the County for review and approval prior to filing a final map. The booklet should be attached and referenced in the CC&R's homes being occupied. See also Conditions 42 and 43 . b. Facts: This mitigation measure has been incorporated into the Project Conditions of Approval. The Project has included a 50 foot wide buffer area between the proposed development and the cattle ranching activities proposed on the remainder of the property. C. Findings: Based upon the SEIR and the entire record before this Board, the Board finds that: (1) Impacts Avoided or Substantially Lessened Project impacts related to proximity of agricultural activities have been avoided or substantially lessened by the Project buffer areas and the referenced mitigation measure. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. (2) Remaining Impacts See Section C. 5.b(2) , on page 11, incorporated herein by reference. Other WSP EIR Impacts/Mitigation Measures and Findings The WSP EIR sets forth three further areas of impacts and mitigation measures. These areas are not further addressed in the SEIR. They are briefly addressed below. Housing, Population and Employment 83. WSP Impact: The Specific Plan would result at buildout in an increase of approximately 18 percent over the current population of San Ramon and would consist of eight percent of future growth to occur in the City. 76 a. WSP EIR Mitigation Measure: The impacts are on public services. The appropriate mitigation measures are discussed in other sections of the WSP EIR. b. Facts: This impact references increase in City of San Ramon population. The Project is being approved by the County. The mitigation measures regarding impact on County and other services are set forth throughout these Findings. C. Findings: The Board finds that increased population and impacts on public services are avoided or substantially lessened for reasons stated throughout the applicable public services sections of these Findings. 84. WSP Impact: The project would create fewer housing units than proposed under the (City of San Ramon) General Plan, and, because of the lower density, the cost of those units would be higher. The project would contribute to the gap between what those employed in the area can afford and the cost of housing is in San Ramon. The majority of area employees would not earn incomes at those local jobs sufficient to allow them to purchase housing in the Westside. a. WSP EIR Mitigation Measures: 4 . 3-1: Designate some areas for higher density. 4 . 3-2 Encourage affordable housing by use of density bonuses. 4 . 3-3 Allow increased development and higher density next to existing roads and utilities. b. Facts: The stated impact concerns the San Ramon General Plan; the Project is being approved by the County. However, for the purposes of these Findings, higher density is unnecessary and infeasible because of project topography and location. To mitigate the need for affordable housing, the Project shall contribute to the County affordable housing trust fund, in the fixed amount of $3 , 333 per approved residential unit. See also Conditions 51. C. Findings: Project impacts regarding higher cost housing and affordable housing have been mitigated or substantially lessened for reasons set forth above. Project higher density is rejected as unnecessary and infeasible for reasons set forth above. Air Quality 85. WSP Impact: Clearing, excavation and grading operations, construction vehicle traffic on unpaved ground, and wind blowing over exposed earth surfaces generate dust. Therefore, construction on the project site would temporarily increase TSP and PM/10 concentrations and could lead to violations of the Federal and State 24-hour average PM/10 standards if dust suppression measures were not implemented. The project will potentially have adverse PM/10 impacts during construction on adjacent residential neighborhoods. a. WSP EIR Mitigation Measure: 4 . 6-1 All construction contracts should require watering. 4 . 6-2 Conditions of approval should require daily cleanup of mud and dust. 77 b. Facts: These mitigation measures have been incorporated into the Project conditions of approval. Impacts during construction on "adjacent residential neighborhoods" are mitigated by the remoteness of the Project area. C. _Findings: Project impacts from construction on air quality are avoided or substantially lessened by the Project through incorporation of the referenced mitigation measures and Conditions of Approval, for reasons set forth above. 86. WSP Impact: Existing violations of the eight-hour CO standard (9. 0 ppm) are projected at curbside at the San Ramon/Crow Canyon intersection. Modeling also suggests that, while the violation would be limited to the sidewalk areas over most of the length of these major local roadways, the eight-hour CO concentrations wold remain above the standard within a 100- to 200-foot radius of the intersections. a. WSP EIR Mitigation Measure: 4 . 6-3 Implementation of the roadway improvements proposed by Section 4 . 5 of the WSP EIR would substantially improve traffic flow, and, therefore, air quality at this intersection. b. Facts: The WSP EIR confirms that implementation of measure 4 . 6-3 above reduces the impact to a less than significant level. The Project generally incorporates the mitigation measures listed in the WSP EIR for traffic improvements. (See discussion under the Traffic section of these Findings. ) C. Findings: Project impacts on the air quality at the San Ramon/Crow Canyon intersection will be avoided or substantially lessened by Project incorporation of traffic mitigation measures and Conditions of Approval as set forth in these Findings and Conditions 18 and 47 regarding dust control. Historical and Archaeological Resources 87. WSP Impact: Access to "rock walls" due to general development under the Specific Plan could lead to their destruction. a. WSP EIR Mitigation Measure: 4 . 13-3 : Preservation of rock walls an only be assured by excluding people from this area. Locations and condition of the walls should be recorded and monitored. b. Facts: The rock walls identified in the WSP EIR are located generally along the Alameda side (western WR property line) of the Contra Costa/Alameda County borders extending from the approximate 1, 600 foot contour towards the southeast. The Project development is entirely within Contra Costa County and only along a portion of the eastern side of Wiedemann Hill. The rock walls are geographically remote from the proposed development and not immediately accessible from the Project road system. The area along the eastern side of Wiedemann Hill outside the development will remain in deed-restricted, open space ownership. The Project should not be responsible for the referenced mitigation measure; it will not cause deterioration of the rock walls. The Project does provide direct access to these areas of the open space; restricting such access 78 in an effort to protect the rock walls would not be conducive to maximizing open space access. C. Findinqs: The Project impacts on the referenced rock walls are insignificant. The proposed mitigation measure is unnecessary and infeasible for this Project, which is geographically separate and removed from the rock wall. 88. WSP Impact: A historic barn located on the Wiedemann property would probably be affected by any development plans. a. WSP EIR Mitigation Measure: 4 . 13-4 : Monitoring by an archeologist might be necessary. b. Facts: The barn on the Wiedemann property is located on a proposed residential lot. When development occurs, the monitoring by a registered archaeologist would assure identification and removal of historic materials. The conditions of approval require an archaeologist during grading. C. Findings: The Project impacts regarding the historic barn have been avoided or substantially lessened. The Conditions of Approval require an archaeologist to be present while development occurs to ensure removal of historic materials. See Condition 48 . E. Significant Unavoidable or Irreversible Adverse Impacts a. Facts: The SEIR discusses significant unavoidable adverse impacts of the Project at pp. 3-87 , 3-88 . The SEIR confirms that the WSP SEIR made findings of overriding considerations for the following unavoidable impacts of development in the Norris Canyon Road Area: (1) Alteration of the visual character of the area; (2) Permanent change in the landform of the cross- valley ridge and visibility from open space areas; (3) Inconsistency with the Resource Conservation Overlay District Ordinance Standards; (4) Permanent change in the rural character of Norris Canyon Road due to proposed roadway improvements and widening; and (5) Visibility of water tanks. The Project has avoided or substantially lessened all its significant environmental impacts. The Findings made throughout this document on an impact-by-impact basis confirm that all significant environmental impacts have been mitigated, including impacts (1) - (5) above, which were considered unavoidable in the WSP EIR in the context of the entire WSP and at that early conceptual planning level of design and consideration. With regard to impacts (1) - (5) above, all significant environmental impacts have been mitigated. The Project has included extensive mitigation measures above and beyond those set forth in the WSP, as follows: . (1) Alteration of visual character: The Final EIR and the entire record confirms that the significant impact of a change in view has been avoided or substantially lessened by the project design. A change in view or land form is not in and of itself 79 an "unavoidable" significant impact. The SEIR confirms that a change is a subjective matter, particularly when the area has been included within the ULL and planned for residential use. Here, mitigation measures incorporated into the design of the Project, combined with the limited area of development and its limited visibility reduce the visual impacts from that envisioned in the WSP EIR. The Project is consistent with the hillside protection policies in the General Plan. The ridge and its open hillsides in their entire context will have retained their existing visual character with this Project. Therefore the alteration of the visual character of the area is less than significant. (2) Cross-valley ridge and visibility from open space: The view of the upper ridgeline and its hillside in the foreground has been substantially preserved. Intermittent, limited development below the ridgeline, with the vast majority of Project property locked into permanent open space, is not a significant visual impact with the design of this Project. A change in the cross-valley ridge is not a significant visual change in context with the entire ridge and hillside. Grading envisioned in the WSP EIR has been greatly reduced, and Project incorporated guidelines serve to protect and preserve these areas and related visibility. views from the BROS have been protected to the satisfaction of EBRPD by relocations of units and changes to the Conditions of Approval to further mitigate visual impacts of homes on the cross- valley ridge (it is not a true ridge but more of an intermediate part of the hillside) . (3) Inconsistency with the RCOD: Inconsistency with the San Ramon RCOD standards is not a significant impact for the Project, because here County standards will be applied. (4) Change in rural character of Norris Canyon Road: The improvements to Norris Canyon road are limited to safety improvements, and minimal capacity improvements, less than contemplated by San Ramon. The rural character of the road will be maintained. (5) Water tanks: Additional mitigation measures have been included in the Project to ensure the water tanks have been located, sized and designed to eliminate any visual impacts. They are smaller than contemplated in the WSP and no longer conceptual in nature or design. b. Findings: The Project, with mitigation measures as set forth in these Findings, avoids or substantially lessens all significant impacts, including those listed as unavoidable impacts in the WSP EIR as set forth at (1) - (5) , above, for the reasons set forth above. F. Cumulative Impacts a. Facts: The SEIR contains a discussion of the Projects potential cumulative impacts at pp. 3-88 , 3-89 . Table 3 . 6- 1 lists reasonably foreseeable projects in the San Ramon Area. Figure 3 . 6-1 identifies the locations of such projects. 80 The SEIR confirms that in most cases the potential cumulative impacts of the Project are addressed under the individual topics set forth in the SEIR and WSP EIR. The SEIR lists a summary of potential impacts of development in the Norris Canyon Road Area as identified in the WSP EIR, as follows: (1) Increased traffic volumes on Norris Canyon Road and level of service impacts at both the San Ramon Valley Boulevard/Bollinger Canyon Road and San Ramon Valley Boulevard/Norris Canyon Road intersections; (2) Cumulative increase in existing noise levels; (3) Visual character and effect on remaining agricultural activities; The SEIR confirms in its individual Traffic, Noise and Agriculture section, and in its cumulative analysis, that the impacts identified in the WSP EIR are reduced generally as follows: (1) Increased traffic volumes: The Project will contribute incrementally to cumulative traffic volumes on local and regional roadways. All intersections within the study area which are affected by the Project would operate at a level of service D or better with cumulative traffic (including the Project) , with traffic measures recommended by the SEIR at Section 2 . 3 . The project will contribute its fair share where necessary to mitigate cumulative traffic impacts and will construct those improvements that are required to mitigate existing, approved plus Project traffic impacts and meet County growth management standards. (2) Noise: The SEIR confirms that noise levels along Norris Canyon Road will increase approximately 4 decibels more with cumulative development. The Project will contribute an additional 1 decibel for a total of 5 decibels. The noise study prepared with the SEIR confirms that the Project's share of cumulative noise impacts will be mitigated by building the sound walls per Condition 41. That represents the Project's fair share of cumulative noise impacts. In fact, the Project will pay for its construction. (3) Visual: The Project would change somewhat the visual character of the local and regional hillside areas by introducing suburban uses into a relatively ' rural setting. The Project combined with other hillside developments in Contra Costa and Alameda Counties would contribute to a long-term cumulative visual change of the hillside areas of these counties. The SEIR confirmed that the impact of a change in view has been mitigated by the Project design. Further, a change in view or land form is not in and of itself an unavoidable significant impact. It can be mitigated, and it has been mitigated with regard to this Project. Further, the preservation policies along the Los Trampas and Pleasanton Ridge confirm that cumulative visual change along the ridge will be minimal. Intermittent, limited development below the ridgeline is not a significant visual impact if 81 sensitively developed. To the west, Alameda County has long maintained agricultural land use policies. The County's ULL provides additional protections as does its 65/35 Land Preservation Plan. Finally, the Project will not necessarily make it difficult for remaining agricultural activities to be viable; nor will it necessarily cause nearby properties to develop. The Project retains the substantial majority of the property in agricultural use and related open space use. Scenic easements are also provided. Further, by retaining the substantial majority of property as open space, neighboring properties will not be pushed toward development. b. Findings: Based on the Final EIR and the entire record, the Board finds the Project's cumulative impacts have been avoided or substantially lessened by the WSP EIR mitigation measures and SEIR mitigation measures as incorporated into the Project, for the reasons set forth above. No additional mitigation measures are necessary to reduce this impact to a level of insignificance. To the extent cumulative impacts must be mitigated and have not been mitigated, see Section C. 5.b(2) , on page 11, incorporated herein by reference as applied to such cumulative impacts. G. Significant Irreversible Changes a. Facts: The SEIR discusses significant irreversible changes at pp. 3-89, 3-93 . CEQA requires (1) an analysis of the justification of uses of nonrenewable resources during the initial and continued phases of a project which may be irreversible since large commitment of such resources makes removal or nonuse thereafter unlikely; and (2) an analysis which describes irreversible damage that could result from environmental accidents with a project. The SEIR describes the two significant irreversible changes associated with the development in the Project area as identified in the WSP EIR: (1) Conversion of open space and agricultural land to urban and suburban uses; and (2) Significant grading of residential areas including the grading down of the cross-valley ridge to 90 feet lower than its existing level and the filling of one creek. The SEIR confirms that mere conversion of opens space and agricultural land as part of this Project is not a significant impact (see SEIR sections at Land Use, Aesthetics, and Geology and Soils) : Conversion of some open space has been planned by the County, and the site is within the ULL. Project design guidelines will minimize impacts. The Project lands are not considered "prime" agricultural lands. The vast majority of Project lands will remain as protected open space. With regard to grading, the Project will reduce the amount of grading down of the cross-valley ridge from the 90 feet envisioned in the WSP EIR to approximately 50 feet. The design of the project and the location of the cross-valley ridge, really an intermediate hill with limited visibility, are such that the visual impacts of this isolated cut has been substantially mitigated. 82 b. Findings: The Project impacts arising from significant irreversible changes have been avoided or substantially lessened by incorporation of the WSP EIR mitigation measures and the SEIR mitigation measures. Project impacts regarding conversion of agricultural lands are reduced by sensitive design and construction, and retaining the substantial majority of project acreage as open space, in combination with the open space and agricultural protection policies in San Ramon, Alameda County and Contra Costa as applied to nearby undeveloped land. Project impacts regarding grading are reduced by the Project grading plan reduction from the WSP EIR grading plan. H. Growth Inducing Impacts a. Facts: The SEIR discusses the Project's growth inducing impacts at p. 3-93 . Pursuant to CEQA, a project is considered growth inducing if the project could directly or indirectly foster economic growth or population growth. The SEIR identifies growth inducing impacts as set forth in the WSP EIR for the Norris Canyon Area, as follows: (1) Viability of existing farming operations; (2) Growth pressures for open space land to be developed beyond the proposal; and (3) Extension of new services. Expansion does not create a growth inducing effect if services are planned to serve only the amount of the growth in the WSP. (New sewer and water lines would be planned so as to not have excess capacity that could encourage future additional growth. (4) Extension of new services. Expansion creates a growth inducing effect if service areas include areas other than only those proposed for development under the Specific Plan, or if expansion set a precedent for expansion in other areas. The SEIR states that its analysis did not identify any new growth inducing effect associated with development on the site. With regard to the WSP EIR analysis, the SEIR elaborated as follows: The Project may result in limited growth inducing effects by bringing utility services to the Project site. Utilities such as sewer and water mains would be of a size to accommodate the limited remaining ' development possible within the Westside Area. This growth inducing impact would not be considered significant or adverse because this development would be limited to one property (Freitas property) which is within the Urban Limit Line and is within an area designated by the County General Plan for residential development. Its development potential is limited. In addition, new sewer and water lines would be planned so as to not have excess capacity that could encourage future growth. Moreover, since the WSP the County has adopted the ULL and its 65/35 Land Preservation Plan. Coupled with Alameda County's long standing agricultural land use policies in the are and given the location of the Project, there is very little growth in the area that might be induced. b. Findings: The Project growth inducing impacts are insignificant for the reasons set forth above. Any impacts resulting from the Project are avoided or substantially lessened by the Project with incorporated mitigation measures as set forth herein. 83 I. Relationship Between Short-Term Use and Long-Term Productivity a. Facts: The SEIR discusses the relationship between local short term uses of man's environment and the maintenance and enhancement of long term productivity at p. 3-94 . The SEIR confirms that short-term impacts of the Project would primarily result from construction; i .e. , temporary disturbance of existing vegetation, visual disruption, and energy consumption. The SEIR confirms that construction impacts would not be considered significant due to the relatively short duration of the construction activity and mitigation measures designed to replace or repair damage caused by construction activities. Long- term adverse impacts include traffic congestion, and traffic generated noise. As set forth herein, the Project's extensive mitigation measures reduce these long-term impacts. Beneficial effects of the Project include increased housing, improved trail access, fiscal opportunities for the County, and preservation of large amounts of open space. b. Findings: On balance (with regard to the Project relationship between local short-term use and the maintenance and enhancement of long-term productivity) the long-term benefits of the Project, including increased housing, improved trail access, fiscal opportunities, and preservation of open space, outweigh any short term and long term adverse effects. J. Discussion of Project Alternatives Pursuant to CEQA at Section 15126 (d) , the SEIR includes a comparative analysis of a reasonable range of alternatives to the Project, which could feasibility attain the basic objectives of the Project. The SEIR thus analyses three alternatives, as addressed below. The Addendum incorporates the analysis in the Staff Report of the Avoidance Alternative and the Minimization Alternative. 1. No Proiect Alternative a. Facts: CEQA Guidelines at Section 15126 (d) require that the specific alternative of "No Project" be evaluated in the environmental document. The SEIR discusses this alternative at page 4-2 . The No Project Alternative would avoid changes to the existing environment which would be caused by the Project. These changes include the following: (1) Conversion of open space; (2) Loss of existing vegetation and impacts on stream habitat; (3) Increased noise levels along Norris Canyon Road; (4) Changes in the visual character of a portion of the site; (5) Changes in view; (6) Increased traffic; (7) Expansion of public services; (8) Grading; and (9) Increased storm water runoff. As set forth in these Findings, however, the impacts as summarized above are greatly reduced by incorporation into the Project of the WSP EIR and SEIR mitigation measures. The SEIR confirms further that "changes" in 84 view, etc. do not necessarily equate to significant impacts. The No Project Alternative would not provide benefits which come with the Project. Those benefits include: preservation of the substantial majority of the Project property in open space; the development of needed additional housing in this growing area; and increased revenues to the County. The SEIR confirms that the No Project Alternative would be the "environmentally superior alternative", but it would not be considered a long term alternative because it is inconsistent with the intent of the WSP, the County General Plan land use designation, and the County ULL policy, all of which envision some development in this portion of the planning area. b. Findings: The Board rejects the No Project Alternative because the benefits of the Project, including preservation of open space, development of housing, and increased revenues, are more productive in the long term than the No Project Alternative; and further because the County General Plan and ULL policy envision development of the Project property. The No Project Alternative would be inconsistent with the County General Plan. 2 . Mitigated Project Alternative a. Facts: The SEIR sets forth a discussion of the Mitigated Project Alternative at pp. 4-3 through 4-14 . The Mitigated Project Alternative incorporates all the additional mitigation measures that were identified in the SEIR for the Project. The Mitigated Project Alternative is similar to the Project as proposed by the applicant, because the applicant incorporated many of these mitigation measures into the Project application. The SEIR contains a summary of the specific mitigation measures included in the Project. The applicant included such mitigation through submission of several reports and documents, previously addressed in these Findings, including: (1) Biotic Resource Assessment and Habitat Mitigation Plan (2) Reforestation Plan (3) Aquatic Habitat Plan (4) Habitat Monitoring Plan (5) Hillside Protection and Design Guidelines (6) Range Management Plan (7) Erosion Control Plan The applicant further addressed issues regarding open space, grading impacts, and other issues of concern. The Mitigate Project Alternative incorporates these measures (as incorporated into the Project submittal) , and the additional measures recommended in the SEIR. The SEIR further contains a summary of the specific, additional mitigation measures recommended under each SEIR section, i.e. , Land Use, Aesthetics, Traffic, etc. These measures have been addressed in these Findings, above. The SEIR references two major changes in the Project under this Alternative from that envisioned in the WSP. First, the Project would include a revised entry road, 85 with reduced grading, pavement, and vegetation/tree removal. Second, development of the lots along the south side of "A" Drive in the vicinity of the cross-valley ridge would be subject to Architectural Review by the Zoning Administrator, and subject to identified measures which reduce visual impacts. As confirmed by the Findings above, the Board has determined that the Project incorporation of the WSP EIR mitigation measures, and the imposition of the additional mitigation measures, results in avoidance of significant impacts of the Project. b. Findings: The Mitigated Project Alternative represents a "conditioned" development proposal that would greatly lessen the impacts of residential development as first identified in the WSP EIR. The applicant's incorporation of WSP EIR mitigation measures, and the imposition of the further SEIR mitigation measures as set forth in these Findings, ensures that all significant impacts of the Project are avoided or substantially lessened. Further, with the referenced mitigation measures, the Project is consistent with the County General Plan Growth Management Standards, and Policies. For these reasons, the Mitigated Project Alternative is the preferred alternative. 3. Resource Conservation Overlay District (RCOD) Alternative a. Facts: The SEIR further analyzed the Resource Conservation Overlay District (RCOD) Alternative, at pp. 4-15 through 4-17 . The RCOD Alternative was previously addressed in the WSP EIR. The RCOD Alternative is based on the City of San Ramon's Zoning Ordinance. The purpose of the City's RCOD is to maintain an environmental equilibrium consistent with existing vegetation, soils, geology, slopes, and drainage patterns, and to preserve the natural topography, including swales, canyons, knolls, ridgelines, and rock outcroppings. The RCOD requirements do not apply to the site. It is similar to the avoidance alternative in the SRVRPC staff report. Based on the restrictions imposed, the proposed 371 homesites would be reduced to approximately 50 homes, which could be possibly be built within the proposed development area within the flatter portions of the Project site. Because the RCOD requirements so limit development, additional environmental benefits would occur if this Alternative were utilized. There would be a reduced impact on open space/agricultural lands; reduced visual impacts; reduced traffic; and reduced impacts on public services. However, the RCOD requirements in effect would be a "No Project Alternative. " The Project site consists of 1, 143 acres, the great majority of which will be restricted to open space use. The RCOD requirements, allowing only 50 homesites on this vast property, so severely limit development that they do not allow a reasonable use of the property. The same drawbacks for the "No Project Alternative" as listed above thus in effect apply here. The Board has found that development can occur on the Project site beyond the strict limitations of the ROOD, without significant impacts. The Mitigated Project Alternative, with its extensive additional mitigation 86 measures, allows reasonable development while minimizing such impacts. b. Findings: The Board finds that the benefits of allowing reasonable development on the Project site outweigh any environmental benefit of utilizing the RCOD Alternative. The Mitigated Project Alternative allows reasonable development, while limiting environmental impacts through strict mitigation measures. The RCOD Alternative severely limits development without much incremental environmental benefit. Moreover, reducing the density of the Project is not necessary to mitigate its impacts to a level of insignificance and, therefore., such an alternative is inappropriate under per PRC 21085. R. Statement of Overriding Considerations CEQA requires the decision-makers to balance the benefits of a proposed project against any unavoidable environmental risks in determining whether to approve the project. (CEQA Guidelines at Section 15093) The Board has determined that all environmental impacts of this Project, both individual and cumulative, have been mitigated to a level of insignificance. However, if any of the identified impacts are found to remain significant and unavoidable, then the Board has determined that the benefits of this Project outweigh any such unavoidable environmental impacts. This Board adopts the following Statement of Overriding Considerations regarding any such remaining, unavoidable and irreversible impacts of the Project and the anticipated economic, social and other benefits of the Project. This Statement of Overriding Considerations is supported by substantial evidence in the record of these Findings. 1. Findings and Statement a. Overriding Considerations. Any remaining, unavoidable and irreversible impacts of the Project are acceptable in light of the environmental, social, economic and other considerations set forth herein because the benefits of the Project outweigh any significant and unavoidable or irreversible adverse environmental impacts of the Project. b. Reiected Mitigation Measures. Any mitigation measures which were recommended in the EIR but not incorporated into the Project due to their infeasibility are infeasible in part because such measures would impose limitations and restrictions on the Project so as to prohibit the attainment of specific social, economic and other benefits of the Project which this Board finds outweigh the unmitigated impacts of the Project. Some mitigation measures in the EIR have been adjusted to be more effective and in light of direction from staff, the SRVRPC, the Board, interested agencies and the applicant. The Conditions of Approval should also be considered additional mitigation measures as part of the Project. C. Project Alternatives. The Project Alternatives set forth in the SEIR are infeasible (except for the Mitigated Project Alternative) in part because such alternatives would prohibit the attainment of specific social, economic and other benefits of the Project which this Board finds outweigh the environmental benefits of the Project alternatives. The Project applicant has stated that none of the alternatives are acceptable and it would not develop the property under any of the alternatives. 87 2. Description of Overriding considerations a. Extent of Open Space Preserved The Project property consists of 1, 143 acres of land. Currently, such property is bound by Williamson Act contracts, which keep such property in agricultural and related open space use. However, Williamson Act contract on the major portion of such property will run out in approximately three years. Of the 1, 143 acres of Project land, approximately 854 acres or 75% will be permanently restricted to agriculture and open space use. With regard to such 854 acres, parks and common open space of the Project comprise 181 acres, of which 172 acres will be common open space within the Project. The remaining 673 acres will be privately-owned and deed restricted to agricultural and open space uses. Cattle grazing will continue on the 673 acres of open space. A new Williamson Act contract will be entered into as well on the 598 acres. The development area of the Project site is contemplated for development under the County General Plan and the County Urban Limit Line. Approval of the Project now will allow preservation of the substantial majority of the property in permanent open space use. Such permanent preservations avoids the possibility that this substantial part of the Project site, which has the most visual and open space significance, may be authorized for development, either as large lot ranchettes (5 acre minimum parcel size) as allowed in the current General Plan, or as a suburban hillside through an amendment to the General Plan. b. Need for Additional Housing, including Higher End Housing, in San Ramon Area The County General Plan, Housing Element, sets forth projected housing needs county-wide for the years 1988 to 1995. (General Plan at pp. 6-1, et seq. ) The General Plan cites information provided by the Association of Bay Area Government (ABAG) in its January 1989 publication, Housing Needs Determinations (incorporated herein by reference) . State law requires ABAG to determine housing needs for all income levels so that each jurisdiction can provide for its "fair share" of housing for each income group. Thus, ABAG sets forth projected housing needs in Contra Costa County in four separate income categories: Very Low; Low; Moderate; and Above Moderate. The ABAG figures estimate a total projected need for 48, 756 units in the County for the years 1988-1995; 42 , 309 units in incorporated areas, and 6, 447 units in unincorporated areas. (General Plan at p. 6-22 , Table 6-6) Of such 48 , 756 units, 23 , 198 units are projected to be required in the "Above Moderate" category. (General Plan at p. 6- 24 , Table 6-8) Specifically, the City of San Ramon, which includes the Project in its sphere of influence and may eventually annex the Project, is projected to require 4 , 065 "Above Moderate" income units. Such requirement for "Above Moderate" income units is higher than for any other city in the County. Further, testimony at the public hearings for project approval confirmed the need and desire for higher end housing in the San Ramon area. Local citizens at the September 23 , 1992 Board hearing, and other hearings, including experienced real estate agents and contractors, testified that San Ramon has consistently delivered lower cost, higher density single-family and multiple-family housing compared to other communities in the San Ramon Valley Testimony further showed, however, that single- 88 family housing at the higher end of the market in the San Ramon Valley area is scarce, requiring local citizens and others to move to other communities in the area to find it. Public testimony cited a study of the Tri-Valley Area wherein house sales for a recent twelve month period in the range of $500, 000 to $1, 000, 000 included 89 sales for Alamo; 90 for Blackhawk; 78 for Danville; 5 for Brentwood; and only 1 for San Ramon. Testimony confirmed that the Project is San Ramon's most significant opportunity for higher end housing, thereby providing balanced housing opportunities in San Ramon and its sphere of influence. Testimony further confirmed that plans for the Dougherty Valley area are for more median and lower cost homes, with higher density. Finally, it is noted that several County General Plan Goals, Policies and Implementation measures also support and encourage approval of higher end housing in the Project area. The General Plan Housing Element, at p. 6- 106, Goal 6-B, sets forth the goal of making "available a wide range of housing types and residential densities to meet the needs of all age groups and household sizes within Contra Costa County's population. " The Housing Element, at p. 6-107 , Policy 6-1, states that a "balance of housing types, tenures, densities, and price ranges shall be encourage, supported and stimulated. " Policy 6-6 confirms that housing opportunities shall be provided for all economic segments of the population throughout the County. This beautiful hillside setting represents a good opportunity to provide custom homes as large lots designed in a sensitive manner to appeal to the higher end of the housing market. The Board finds that there is a reasonable need and desire for higher end housing in the San Ramon area, which is addressed by the Project. Moreover, there is an obvious benefit to the local economy and job opportunities, in particular to the building industry, through the construction of this Project and its custom homes. C. Project Will Contribute to Needed Decreases in San Catanio Creek Peak Flows The Project includes the construction of an on-site detention basin to regulate increases of storm water run- off. The detention basin will regulate on-site run-off entering San Catanio Creek. The "Detention Basin Report" referenced in the SEIR at p. 3-41 confirms that the proposed basin will decrease peak flows in San Catanio Creek at the Project site outfall from existing conditions by more than 30%. In and of itself this decrease does not solve downstream flooding, because discharge from the Project site is a relatively small part of the overall watershed that contributes to downstream flooding. However, similar measures added to development projects in the watershed coupled with any new stream improvements that may be implemented by the County Public Works Department and the City of San Ramon will help to relieve downstream flooding. This Project is a good start. d. Project Will Provide Needed Improvements to Norris Canyon Road The Project Conditions of Approval require the applicant to construct needed road improvements along Norris Canyon Road, based on a 35 mph design speed, 34-ft. road width with bicycle lanes and 4-ft. all weather shoulders. The Board finds that these road improvements are needed for 89 safety reasons, and that there currently are no other potential sources of County funding for such improvements, given current and projected budget and revenue conditions. Moreover, according to the Public Works Department, there are not any likely substantial development fee sources for these improvements other than this Project. Public Works will look to the Freitas property for other improvements if it develops. Approval of the project with its conditioned obligations to improve Norris Canyon Road will allow the improvements to be constructed. L. Consistency with General Plan The SEIR sets forth at Table 2 . 1-1, p. 2-10, a chart entitled "Contra Costa General Plan Policies Evaluated in this SEIR". The Board has found the Project to be consistent with each of the County General Plan goals, standards, and policies as set forth on such chart. The Board's specific Findings for each goal, standard and policy are set forth in these Findings under the discussion of the corresponding Section in the SEIR. 90 EXHIBIT F-2 FINDINGS REGARDING REZONING TO PLANNED UNIT DISTRICT (P-1) (# 2947-RZ) ; PRELIMINARY DEVELOPMENT PLAN (#3.005-91) ; AND APPROVAL OF VESTING TENTATIVE MAPS 7575 AND 7578 The Board of Supervisors of Contra Costa specifically find as follows: Rezoning to Planned Unit District/Development Plan 1. Finding: The applicant intends to start construction within two and on-half years from the effective date and plan approval. Facts: The applicants have previously furnished the County a letter dated May 20, 1992 and incorporated herein by reference, that provides the factual support for the Board to make this finding. 2 . Finding: The proposed planned unit development is consistent with the County General Plan. Facts: a. General: The General Plan designation for the property is single family residential, low density. The subdivision is consistent with such designation. The subdivision is consistent with the General Plan's established County Urban Limit Line, which defines the area within which further development shall occur. b. Compatibility with General Plan Goals, Policies, and Implementation Measures: The subdivision is further compatible with General Plan Goals, Policies, and Implementation Measures. The Project SEIR performed an extensive review of the County's General Plan policies regarding new development, and their relationship to the Wiedemann Ranch project. (Draft SEIR at pp. 2- 8 , 2-9) . The Draft SEIR sets forth at p. 2-10, Table 2 . 1-1, a list of County General Plan policies evaluated in the SEIR. The SEIR evaluated Project consistency with such policies; such evaluation addressed principle policies of all General Plan Elements. This Board made specific Findings under the California Environmental Quality Act (CEQA) with regard to the Project's consistency with such policies. Such Findings are incorporated herein by reference. The Board found that the Project is consistent with the General Plan goals and policies. 3. Finding: The residential development will constitute a residential environment of sustained desirability and stability, and will be in harmony with the character of the surrounding neighborhood and community. Facts: The Board Findings made as part of the certification of the SEIR are incorporated into these Findings by reference. Such SEIR Findings confirm that the project, with mitigation measures, will constitute a stable, harmonious project, in harmony with the surrounding neighborhood. The property consists of 1, 143 acres. The substantial majority of the property will be kept in open space. The developed area will be constructed in a sensitive manner consistent with approved design guidelines. The residential development will be located adjacent to the preserved open space. The project has been designed to include 1 buffer areas between the residential uses and the agricultural and open space uses, to help insure compatibility between the two uses. These buffers will include a fifty foot wide band around the perimeter of the development area, within which no development or agricultural uses would be allowed. In addition, each lot contains private open space within which no development will be allowed. These buffer areas significantly reduce the potential land use conflicts associated with Project development. The Project will be designed sensitively and with minimized impacts, within the hilly terrain of the Project site. The Project incorporates Hillside Protection and Development Guidelines to help insure that development design preserves the natural environment, while achieving a harmonious relationship with neighboring structures. 4. Finding: The development of a harmonious, integrated plan as set forth above justifies exceptions from the normal application of this code. Facts: A planned unit development is desired when application of conventional zoning regulations to a. large-scale development may create a monotonous and inappropriate neighborhood. Further, the planned unit development is intended to allow diversification in the relationship of various lots sizes and open spaces, while insuring substantial compliance with the General Plan. (County Ordinance 84-66. 204) The proposed planned unit development on this Project, which contains rolling hillside lands, allows for diversification of lot sizes, avoiding a "cookie- cutter", monotonous development, and allowing for clustering of the homesites in a smaller, defined area, while preserving the great majority of the project property (681 acres) into open space. Rezoning to planned unit development further allows the County lock in lot sizes and placement, and to place strict conditions of approval on the Project design and grading to help protect the topography and environment and to promote sensitive design. Approval of Tentative Map 1. Finding: The subdivision is consistent with the County General Plan. Facts• a. General: See 2 .a. , on page 1, incorporated herein by reference. b. Compatibility with General Plan Goals, Policies, and Implementation Measures: See 2 .b. , on page 1, incorporated herein by reference. 2. Finding: The design of the subdivision will provide for future passive or natural heating or cooling opportunities. Facts: The Project conditions of approval require that all Project homes be designed to meet energy efficiency standards of 10% more than the requirements of Title 24 of the California Code of Regulations currently in effect, unless otherwise approved by the Zoning Administrator (ZA) as to glass efficiency standards to provide architectural design flexibility. The design of the subdivision with its large lots and varied exposures will allow for future passive or natural heating or cooling opportunities in the design of the homes. Such opportunities. will be taken into account by the ZA in consideration of design approval consistent with the approved conditions and mitigation measures. 3. Finding: The discharge of waste from the subdivision in the existing sewer system will not result in violation of existing requirements. 2 Facts: The Project SEIR addressed treated wastewater and sewage disposal at Section 3 . 2 . 4 , p. 3-45. The Project will require off-site sewer improvements as set forth in the SEIR. The Project site will be annexed to the Contra Costa County Central Sanitary District (CCSD) , and will pay all applicable facility capacity fees. Compliance with all CCSD requirements will be necessary. The SEIR confirmed that the Project will mitigate all potential impacts by providing the necessary sewer improvements and paying applicable fees consistent with CCSD requirements. (SEIR at p. 3-49) 4. Finding: Pursuant to G.C. §66474 , the Board must deny a tentative map if it makes any one of seven listed findings. (566474 (a) -(g) The Board confirms that it does not make any of such findings, and rather finds the following in the affirmative: a. Finding: The proposed map is consistent with the County General Plan. Facts: See Facts for Finding 1, above. b. Finding: The design or improvement of the proposed subdivision is consistent with the County General Plan. Facts: The lot configuration and general project design of the subdivision using the planned unit development approach are consistent with the General Plan and its goals, policies and implementation measures. P-1 zoning allows clustering of the homesites and preservation of a substantial majority of the property acreage as permanent open space; the buffer areas between the residences and adjacent agricultural uses will ensure compatibility of the two uses. See also Finding 1, above. C. Finding: The site is physically suitable for the type of development. Facts: The County General Plan and the Westside Specific Plan, and their environmental documentation, specifically designated the site for residential development and found the site physically suitable for such development. The Project SEIR further thoroughly evaluated the impacts of the residential development, and found residential development suitable. For reasons set forth in the Board's Findings on the SEIR for the Project, the Board confirms that the project is suitable for residential development. d. Finding: The site is physically suitable for the proposed density of development. Facts: The County General Plan designated the area for 528 units; the Westside Specific Plan (WSP) designated the area for 450 units. The Project SEIR reviewed and analyzed the site's physical suitability for the proposed density, specifically in its sections regarding Land Use; Aesthetics; Geology and Soils; Storm Drainage; Plant and Animal Life; and Agriculture. The Project SEIR, and the Boards Findings thereon, confirm the site's physical suitability for the Project density. The Project includes an Aquatic Habitat Plan, a Reforestation Plan, a Range Management Plan, and an overall Monitoring Program, to ensure that the site's environment is protected on a continuing basis. The Project incorporates Hillside Protection and Development Guidelines to ensure development is performed sensitively and with minimal site impact. e. Finding: The design of the subdivision is not likely to cause environmental damage or injure fish, wildlife or their habitat. Facts: Biological surveys of the Project site were conducted in 1988 and 1989 as part of the Westside Specific Plan EIR. A Biotic Resource Assessment and Habitat Mitigation Plan was 3 prepared by Sugnet & Associates to provide supplemental information specific to the propose project. The Project SEIR contained specific analysis of Project impacts on fish, wildlife and their habitat. (Section 3 . 3) The Project incorporates an Aquatic Habitat Plan, which provides for the creation of approximately 3 . 0 acres of new wetlands area. The Project further includes a Reforestation Plan, which provides for the planting of approximately 6, 705 trees on the site. Finally, the Project has a Monitoring Program to ensure that proposed reforestation and aquatic habitat replacement plans are implemented and successful. The Board's Findings with regard to the SEIR impacts confirmed that the project with incorporated mitigation measures will have an insignificant impact on fish and wildlife. f. Finding: The design of the subdivision will not cause serious health problems. Facts: The Project SEIR analyzed health and safety issues as part of its discussion of Geology and Soils (Section 3 . 1, p. 3-1) Several geotechnical reports were prepared, and analyzed in the SEIR. Based on such reports, and other information as set forth in the SEIR, the project design will be one of stability and safety. g. Finding: The design of the subdivision will not conflict with easements, acquired by the public at large, for access through or use of, property within the proposed subdivision. Facts: The Project contains an integrated trail system to ensure new access through open space lands and linkage with other regional trails planned or located outside the project site. The proposed system and open space plan are endorsed by the East Bay Regional Park District. No other potential conflicts with public easements are apparent. 4 ATTACHMENT 1 TO EXHIBIT F List of Exhibits Submitted To The San Ramon Valley Regional Planning Commission and The Contra Costa County Board of Supervisors* Scale Model (dated Nov. 1990) . Westside Specific Plan FEIR Viewpoint Photography (dated April and June, 1992) . Wiedemann Ranch Residential Community Park Plan (revised September 1, 1992) . Large aerial (dated April 27 , 1990) with mylar site plan overlay (dated April 1992) . Comparative Visual Analysis: Westside Specific Plan EIR vs. Wiedemann Ranch Residential Community Site Plan. Percent Slope Model Wedges prepared by A.M. Guzzardo, Inc. Photographic Viewshed Analysis based on WSP EIR viewpoints (dated August 1991) . Computerized Viewshed Analysis by CADP (dated September 1991) . Regional and Project Trail, Agricultural Lot, Open Space and Scenic Easement Map (colorized dated November 12 , 1992) . Viewshed Analysis based on WSP EIR viewpoints + Norris Canyon Road and Bishop Ranch Regional Open Space (dated July 1992) . Viewshed Analysis based on WSP EIR viewpoints depicting revised 371 lot configuration (dated November 17, 1992) . EBMUD Ultimate Service Boundary Map prepared by Aliquot (dated November 17 , 1992) . Subdivisions 7575 and 7578 VTM of Wiedemann Ranch revised November 13 , 1992 depicting 371 lots with relocated lots colorized. LAFCO Annexation Map prepared by Aliquot (dated November 13 , 1992) . * (This is a partial list only depicting the principal exhibits) .