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HomeMy WebLinkAboutMINUTES - 02021988 - T.6 �, ora T. 6 Costa TO: BOARD OF SUPERVISORS Coirty FROM: Harvey E. Bragdon, Director of Community Development DATE: 17 December 1987 SUBJECT: Subdivision #6443 (Alhambra Valley Ranch) - Hearing on revised Flood Control Requirements Appeal. (S.D. II ) SPECIFIC REQUEST S) OR RECOMMENDATIONS(S) 6 BACKGROUND AND JUSTIFICATION RECOMMENDATIONS 1. Accept the previous environmental documentation as adequate for the recommended modification. 2. Amend Condition #24-L as recommended in County Planning Commiss- ion Resolution No. 35-1987. I BACKGROUND Subdivision #6443 was approved for 17 5-acre lots subject to the construction of a drop-structure at a proposed bridge crossing over del Hambre Creek. The purpose of the drop-structure was to slow down runoff during peak flow periods. However, following project approval, Public Works Dept. , further evaluated soil conditions in the creekbed and determined that a drop-structure might lead to severe creekbank erosion. Such erosion would be potentially damaging to the interests of abutting property owners. In 1986 , at the recommendation of Public Works Dept. , the Planning Commission deleted the drop-structure requirement and instead re- quired the applicant to excavate an off-site regional detention basin. The cost of the excavation could not exceed $45,000 At the same time, the Commission required the provision of erosion control in the vicinity of the proposed bridge. Subsequently, the Commission' s decision was appealed by the appli- cant. The appeal challenged the requirement to make improve- ments to stabilize the creekbanks because of the costs. In November 1986, the Board of Supervisors referred the appeal back to the County Planning Commission for additional review. The Commission considered this matter in public hearings on April . 7 and May 12, 1987. Attached is the staff report and transcript of the May 12th hearing. Moreover, a number of meetings have been conducted at the site involving the applicant, potentially affected property owners and staff. On May 12, 1987, the Commission further modified Condition #24-L. Attached iq Resolution #35-1987, certifying the Commission's action. The modification would provide that future owners of the lots in Subdivision #6443 be notified of their responsibility to share in the maintenance of the creekbank improvements. This responsibility for creekbank maintenance would only extend to the area within the road right-of-way to the subdivision. CONTINUED ON ATTACffiKENT: YES SIGNATU ACTION OF BOARD ON February . 19RR APPROVED AS RECOrII�DED _ OTHER This being the time noticed for hearing by the Clerk of the Board of Supervisors on this matter, the public hearing was opened and the following people appeared to speak: Milt Kubicek, Public Works Department, commented on the memo dated February 2, 1988, presenting two additional clarification points recommended by staff, maintenance in the condition 24L item and the construction of improvements in the creek and the supervision of those improvements, Exhibit A attached. 1. Doug Flett, 1280 Civic Drive, Walnut Creek, applicant commented 'that agreement had been reached on this condition. Supervisor Fanden questioned County Counsel on the notification of property buyers relative to conditions on the property. Victor Westman, County Counsel, advised that that was not a condition of this development. James Farr, resident on the road in question, commented that in his opinion it was the intention of the Planning Commission to have this condition run with the title of the 17 lots. The public hearing was closed. Supervisor Fanden moved to approve the staff recommendations. VOTE OF SUPERVISORS I HEREBY CERTIFY THAT THIS IS A X UNANIMOUS (ABSENT 5 ) TRUE AND CORRECT COPY OF AN AYES: NOES: ACTION TAKEN AND ENTERED ON THE ABSENT: ABSTAIN: MINUTES OF THE BOARD OF SUPERVISORS ON THE DATE SHOWN. cc: Community Development Dept. ATTESTED February 2, 1988 Attn: Robert Drake PHIL BATCHELOR, CLERK OF Flood Control District THE BOARD OF SUPERVISORS Douglas Flett & Associates AN COUNTY ADMINISTRATOR Deadhorse Ranch Investment Group o Thiessen, Gagen & McCoy BYnA,. DEPUTY 2 PUBLIC WORKS DEPARTMENT CONTRA COSTA COUNTY DATE: February 1988 TO: Board of Supervisors FROM: J. Michael Walford, Public Works Director Ave; SUBJECT: Deadhorse Ranch, Subdivision No. 6443 / At 2 : 00 p.m. on February 2 , 1988, you will be conducting a hearing on the referral from the Planning Commission regarding the Deadhorse Subdivision in Alhambra Valley. The Planning Commission approved a modification of condition No. 24-L to provide rock slope protection in the natural creek in lieu of a drop structure. Subsequent meetings with the developer and adjacent residents has surfaced confusion, with regard to future maintenance responsibility for the creek and bridge. We recommend the following be included as a part of your approval of this item: "All property owners using the bridge shall bear a prorate share of the maintenance costs for the bridge, the creek improvements located within the access road right of way, the retaining wall system at the northwest corner of the bridge approach which is located partially outside of the access road right of way, and repairs to the adjoining slope of said retaining wall system that might be necessary for wall stability." The contractor's work on the subdivision improvements has been poor at best. To insure that the creek work is done correctly and in a timely fashion we recommend that your approval include the following additional item: "The construction of the creek improvements shall be performed under continual inspection by the developer's engineer. Upon completion of the work, the engineer shall certify, in writing, that the work was performed according to the approved plans. " MFK:md dhrnh.t2 cc: County Administrator County Counsel Community Development Dir. Resolution No. =35-3987 RESOLUTION OF THE PLANNING COMMISSION OF THE COUNTY OF CONTRA COSTA, STATE OF CALIFORNIA, INCORPORATING FINDINGS AND RECOMMENDATIONS ON THE REQUEST TO MODIFY THE CONDITIONS OF APPROVAL FOR SUBDIVISION #6443 , DEAD HORSE RANCH, IN THE ALHAMBRA VALLEY AREA OF SAID COUNTY. WHEREAS, a request by D.B. Flett & Associates (Applicant) , and DEAD HORSE RANCH INVESTMENT GROUP (Owners), to divide 121 acres into 17 lots in a General Agricultural District (A-2) , was approved by the County Planning Commiss- ion December 4, 1984; and,, WHEREAS, on July 29, 1986, the County Planning Commission adopted Resolution #50-1986 modifying condition #24-L to require the provision of erosion control alon� he banks of Alhambra Creek consistent with Coun "Apolicy; and WHEREAS, on August 8, 1986, an appeal was filed by the developer's representative Thiessen,Gagen & McCoy with the Clerk of the Board, objecting to the revised condition; and WHEREAS, on November 18,1986, the Board of Supervisors referred the appeal back to the County Planning Commission for review and report to the Board; and WHEREAS, after notice thereof having been lawfully given to all parties who had previously registered their interest in this matter, a public hearing .was held by the County Planning Commission on Tuesday, April 7, 1987, and continued to the meeting of May 12, 1987; and WHEREAS, the County Planning Commission having fully reviewed, considered and evaluated all the testimony and evidence submitted in this matter; and NOW, THEREFORE, -BE IT RESOLVED that the County Planniftg Comm scion recommends to the Board of Supervisors that the Board.,G,RANT the appeal and amend Condition #24-L of the co*- ditions of approval for Subdivision #6443, to read as follows: t Resolution No.35-1987 + -v, The applicant shall excavate a detention basin with the cost of excavation not to exceed $45,000; or, if excavation is not possible because Flood Control District has not acquired rights to the basin, con- tribute $0. 25 per square foot of added impervious surface area designated for improvements in Drain- age Zone 5. .2.,- The south side of the creek bank shall be rock- lined 40-ft. , upstream and downstream of the rock slope protection being placed by the developer for the outlet of the storm drains, approximately 115 feet of continuous protection. Grouted rock will be used only where there is no other alternative available. This work shall be subject to review and approval of the Flood Control District and in compliance with the stream-bank restoration policy of the Flood Control District. (This policy includes the requirement that the creekbank improvements are to be maintained by the adjacent property owners and that the property owners are to provide the necessary rights-of-way. ) Covenants shall be recorded,_ with the final map on parcels adjoining the creekbank notifying prospective buyers that they would be responsible for maintain- ing the creekbanks. The notice shall stipulate that as owner of a lot in the subdivision, they will share responsibility for maintenance of the creekbank improvements required as part of the approval of Subdivision #6443 . The instruction by the Planning Commission to prepare this resolution was given by motion of the County Planning Commission on Tuesday, May 12, 1987 , by the following vote: AYES: Commissioners - Davis, Feliz, Aiello, Accornero, Best. NOES: Commissioners - Whitney, Nimr. ABSENT: Commissioners - None. ABSTAIN: Commissioners - None. I, Linda P. Best, Chair of the Planning Commission of the County of Contra Costa, State of California, hereby certify that the foregoing was duly called and held in accordance with the law on Tuesday, August 11, 1987, and that this resolution was duly and regularly passed and adopted by the following vote of the Commission: -2- Resolution No.35-1987 AYES: Commissioners - Davis, Feliz, Aiello, Accornero, Whitney, Best. NOES: Commissioners - Kathleen Nimr. ABSENT: Commissioners - None. ABSTAIN: Commissioners - None. Chair of .the Planning Commission, Contra Costa County, State of California. ATTEST: Secr y of th lanning Commission, Contra Costa Co ty, State of California. -3- Community Development Contra Costa County CONTRA COSTA COUNTY PLANNING COMMISSION TUESDAY, MAY 12, 1987 - 7:30 P.M. Agenda Item # / I. INTRODUCTION REFERRAL FROM BOARD OF SUPERVISORS SUBDIVISION 6443 (Dead Horse Ranch): This is a referral from the Board of Supervisors regarding a proposed modification to flood control requirements provided for Subdivision 6443. The subject property is located 1,000 feet north of Alhambra Valley Road approximately 3,200 feet west of the Reliez Valley Road in the Martinez area. , This matter was considered by the Commission on April 7 and continued to this date in order that more information on soil conditions could be provided. II . RECOMMENDATION Amend the condition as recommended by the Public Works Department. III. BACKGROUND This issue was considered by the Planning Commission on July 29, 1986, at which time the Commission modified the flood control condition to require that a road bridge substitute for a drop structure as a creek crossing. On August 8, 1986, an appeal to the Board of Supervisors was filed by the developer's representative, Thiessen, Gagen, and McCoy, objecting to the revised condition. The Public Works Department responded to the appeal in a memo dated September 19, 1986. On November 18, 1986, the Board of Supervisors referred the appeal back to the County Planning Commission. Attached are Commission Resolution #50-1986 and Letter of Appeal . Also attached are relevant documents forwarded by the Public Works Department. IV. ALHAMBRA VALLEY IMPROVEMENT ASSOCIATION Attached is a letter dated December 18, 1986, from the Alhambra Valley Improvement Association regarding modification of the condition. 2. V. PROPOSED CONDITION The Public Works Department is recommending that condition #24L. be revised to read as follows: 24. L. 1. The applicant shall excavate a detention basin with the cost of excavation not to exceed $45,000; or if excavation is not possible because the Flood Control District has not acquired rights to the basin, contribute $0.25 per square foot of added impervious surface area designated for improvements in drainage Zone 5. 2. The south side of the creek bank shall be rock-lined 40 feet upstream and downstream of the rock slope protection being placed by the developer for the outlet of the storm drains, approximately 115 feet of continuous protection. This work shall be subject to review and approval of the Flood Control District and in compliance with the stream bank restoration policy of the Flood Control District. (This policy includes the requirement that the creekbank improvements are to be maintained by the adjacent property owners and that the property owners are to provide the necessary rights of way. ) BD:jn sub4:6443.bd 3/26/87 5/5/87 Alhambra Valley Improvement Association 22 Wanda Way Martinez, CA 94553 Linda Best, Chairman December 18, 198E Contra Costa County Planning Cmmission 146 Via Copla Alamo, CA 94507 Reference: County Planning Commission Draft Resolution #50-1985 Drainage Requirements For Dead Horse Ranch Subdivision Dear Crrrussioner Best: Recently, the Alhambra Valley Improvement Association held a regular, general meeting. At this time the above resolution was discussed. 'he Alhambra Valley Improvement Association is against modification of the drainaae requlraTents for the above subdivision and request the c aimission enforce the conditions as previously stipulated to by the applicant. Sincerely, )Iea7ntef-Lrensen Secretary Alhambra Valley Immrovenent Assoc. JS/k. cc: c_z=ssioner Nimr Public I%brks - Milt Kubicek RESOLUTION #i50-?986 RESOLUTION OF THE COUNTY PLANNING COMMISSION OF THE COUNTY OF CONTRA COSTA, STATE OF CALIFORNIA, INCORPORATING FINDINGS AND RECOMMENDATIONS ON THE REQUEST TO MODIFY THE CONDITIONS OF APPROVAL ON AN APPROVED TENTATIVE SUBDIVISION MAP (SUBDIVISION 6443) WHEREAS, a request by D. B. FLETT AND ASSOCIATES (Applicant) and DEAD HORSE RANCH INVESTMENT GROUP (Owner) , for approval of the tentative map of Subdivision 6443 to divide 121 acres in General Agricultural District (A-2) into 17 lots was received by the Planning Department on February 22, 1984; and WHEREAS, a Negative Declaration of Environmental Significance was prepared and posted on July 20, 1984; AND WHEREAS, after conducting several public hearings, the County Planning Commission approved the tentative map for Subdivision 6443 on January 15, 1985 subject to conditions, as presented in Resolution #3-1985; and WHEREAS, within the filing period provided by the Ordinance Code, the Alhambra Valley Improvement Association appealed the County Planning Commission's approval to the Board of Supervisors; and WHEREAS, after notice thereof having been lawfully given, the Board of Super- visors scheduled public hearings on the appeal on March 26 and April 9, 1985, whereat all persons interested therein might appear and be heard; and on April 9, 1985 denied the appeal of the Alhambra Valley Improvement Association and directed the Director of Planning to prepare an order for the Board' s considera- tion approving Subdivision 6443 and incorporating the findings and conditions agreed upon by all parties; and WHEREAS, on August 20, 1985 the Board of Supervisors adopted findings for approval of Subdivision 6443 including revised conditions of approval ; Condition 0*24. L. provided for the construction of a road crossing of a creek with a drop structure; and that the cost of said improvements could be credited against the fee requirement for drainage improvements in the area; and WHEREAS, in a memorandum dated May 15, 1986 to Harvey E. Bragdon, Director of Community Development, J. Michael Walford, Public Works Director, requested that a proposal to amend Condition #24. L. , so as to delete the requirement for a drop structure, be scheduled for a hearing before the Board of Supervisors; and WHEREAS, at the suogestion of the Community Development Department staff, Milton F. Kubiceck, Deputy Director of Public Works, reauested in a memorandum dated June 11, 1986 that the proposed amendment to Condition 24. L. be scheduled for hearing before the County Planning Commission; and Resolution =50-1986 WHEREAS, in a letter dated June 19, 1986 to the Planning Commission from the firm of Thiessen, Gagen and McCoy, counsel for the applicant, supported Public Work's recommendation to delete the drop structure as requested by Condition of Approval #24. L. ; and WHEREAS, after notice thereof having been given to the Alhambra Valley Improve- ment Association and to owners of property within 300. feet of the subject site, a public hearing was scheduled for the Tuesday, June 24, 1986 County Planning Commission, whereat all persons interested therein might appear and be heard; and at the conclusion of testimony received, the Planning Commission passed a motion declaring their intent to amend the condition and continued the hearing to the July 29, 1986 hearing; and WHEREAS, a letter was received by the Planning Commission from the firm of Thiessen, Gagen. and McCoy dated July 2, 1986 requesting reconsideration and clarification of the action of the Planning Commission on June 24, 1986; and WHEREAS, a memorandum dated July 24, 1986 was received by the Planning Commission from the Public Works Department recommending that the Planning Commission amend Condition #24. L. to delete the drop structure requirement; and instead require either $17,000 in creek erosion control improvements or rock riprap improvements, at specific points, along the creekbank; and retain the provision for fee contribution for drainage improvements in the area (as required by Condition #24. L. ) . and WHEREAS, the County Planning Commission having fully reviewed, considered and evaluated all the testimony and evidence submitted in this matter, NOW, THEREFORE, BE IT RESOLVED that the County Planning Commission amends Condition #24. L. of the Conditions of Approval for Subdivision 6443 to read as follows: 24. L. 1. The applicant shall excavate a detention basin with the cost of excavation not to exceed $45,000; or if excavation is not possible because the Flood Control District has not acquired rights to the basin, contribute $0.25 per square foot of added impervious surface area designated for improvements in drainage Zone 5. 2. Provide erosion control to the banks of the creek as extensive in length as plus or minus 165 feet, subject to review and approval of the Flood Control District and in compliance with the stream bank restoration policy of the Flood Control District. (This policy includes the requirement that the creekbank improvements are to be maintained by the adjacent property owners and that the property owners are to provide the necessary rights of way. ) -2- Resolution =50-1986 BE IT FURTHER RESOLVED that the reasons for this amended condition are as follows: 1 . The soils along the creekbed may be subject to erosion of a drop structure is used for creek crossing. 2. The measures containined in the amended condition will more effectively con- trol the threat of creekbank erosion. BE IT FURTHER RESOLVED that the County Planning Commission FINDS that the heretofore amended condition will not have a significant effect on the environment; and The instruction by the Planning Commission to prepare this resolution was given by motion of the County Planning Commission on Tuesday, July 29_, 1986, by the follow- ing vote: AYES: Commissioners - Nimr, Feliz, Aiello, Davis. NOES: Commissioners - Best, Accornero, Whitney. ABSENT: Commissioners - None. ABSTAIN: Commissioners - None. I , LINDA P. BEST, Chair of the County Planning Commission of the County of Contra Costa, State of California, hereby certify that the foregoing was duly called and held in accordance with the law on Tuesday, October 14, 1986, and that this resolu- tion Was duly and regularly passed and adopted by the following vote of the Commiss- ion: AYES: Commissioners - Accornero, Aiello, Davis, Feliz, Nlimr, Best. NOES: Commissioners - None. ABSENT: Commissioners - Juanita Whitney. ABSTAIN: Commissioners - None. G�.1/12�� ` •i cy� Chair of the Planning Commission of Contra Costa County, State of California. ATTEST) r tar t � P annin Commission of the y g County of ontr Costa, State of California. ".'AN o T.,E55EN THIE•SSEN, GAGED & McCOY WILLIAM,E GAGEN JR GREGORY L MCCOY A PROFESSIONAL CORPORATION MICHAEL W RUPPRECHT 279 FRONT STREET PATRICK) MCMA-ON M. SUE GREICAR P O. BOX 218 COUNSEL MARK L. ARMSTRONG DANVILLE. CALIFORNIA 94526.0218 WILLIAM W BASSETT LINN K. COOMBS JOHN B. CLAUSEN MICHAEL W.CARTER TELEPHONE(4151 837-0585 VICTOR J CONTI TWX 910-385-4011 J.KENNETH GORMAN JEFFREY G HANSEN ATTNDA NLAW � LINDA 0 HURST BARBARA DUVAL JEWELL CHARLES C. g KOSS August 7, 1986 " CYNTHIA C. LOVE rT o� Q G MICHAEL J.MARKOWITZ STEVEN D MELLEMA ALLAN C. MOORE STEPHEN W. THOMAS WILLIAM C. VENCILL !- _ �7 Board of Supervisors - Contra Costa County .�- Community Development Department 651 Pine Street Martinez, California 94553 Re: NOTICE OF APPEAL - Alhambra Malley Ranch, Sub. 6443 Contra Costa County Planning Commission Decision July 29,. 1986 Dear Members of the Board: Please accept this as a formal Notice of Appeal (pursuant to Contra Costa County Code §26-2.2404 and §26-2. 2406) of the decision of the Contra Costa County Planning Commission on July 29, 1986 concerning the removal of Condition 24.L. from the Alhambra Valley Ranch project, Subdivision 6443 . Although the Commission approved removal of the drop structure required by Condition 24.L. , it imposed alternative conditions which are felt to be inequitable and inappropriate. As you know the issue here is the problem of flood control along the creek. As part of a thorough study of that issue a year and a half ago it was decided that a regional detention basin should be created and each of the property owners developing property in that area should contribute $ .25 per square foot of impervious surface towards the cost of the regional detention basin. That recommendation came from the Contra Costa County Department of Public Works, Flood Control Division. This condition was imposed upon the adjacent Stonehurst project and was the condition originally imposed upon this project. When the Alhambra Valley Ranch project was first before the Planning Commission it had imposed the required $ . 25 per square foot contribution (approximately $45, 000) as well as a small on- site detention basin. The Planning Commission approved that on a six to one vote (Commissioner Nimr opposed ) . The neighbors r 1 ~Board of Supervisors August 7, 1986 Page 2 appealed that decision to the Board of Supervisors and the Board asked the Flood Control District to investigate. The recommendation out of Flood Control (to which requirement the Applicant assented) was that instead of contributing the $45, 000 to the regional detention basin there would be a small drop structure built in Alhambra creek with the understanding (though not expressly spelled out in the condition) that the $45, 000 contribution would probably more than cover the cost of the drop structure ; any monies remaining after payment of the drop structure costs would apply to the regional detention basin. A detailed study of the creek in that area had not been conducted. The Board unanimously approved that modified condition. As the project proceeded towards construction Flood Control staff investigated the situation and determined that: (a) A drop structure here would not help mitigate erosion but might in fact accelerate it; (b) There could be substantial public liability if a large drop structure were created because of : (1) The very attractive nuisance that would be created and the dangers it might impose to residents and visitors to the area, and (2 ) The inverse condemnation that would be involved regarding increased creek erosion upstream because of the specific geology of the area. Accordingly the staff recommended last Fall the elimination of the drop structure and all flood control experts have concurred that a drop structure should not be created. As a result, Application was made before the Planning Commission to have the condition requiring a drop structure be eliminated (the drop structure would have also served as the road access to the project) and instead the developer would make the $45 , 000 contribution to the regional detention basin and be required to construct a bridge across the creek to his project (as was originally envisioned) . Your staff had strongly recommended this and also requested that the developer either contribute an additional $1, 000 per lot towards additional erosion prevention or place some rip-rap in two erosion holes within the creek bed near where his bridge will cross the to the creek. Recall that t;ze project only involves seventeen houses . 3oard cf Supervisors August 7 , 1986 Paae 3 At the Planning Commission hearing last week, the neighbors opposed this project again (as they have consistently from the beginning ) and requested no change in the conditions of approval . They have consistently tried to stop any development in this area -- they have instead requested that if the drop structure is removed that the developer be required to create a detention basin on the Stonehurst project and, in addition, provide what could come to in excess of $100, 000 in stream flank improvements adjacent to their parcels . Misstatements were made to the Planning Commission, after the hearing was closed, to the effect that the neighbors had previously supported this project and also to the effect that the developer should be required to spend up to $85, 000 for improving the stream banks since he was not going to have to spend $85, 000 for a bridge. In fact the applicant will be putting in the bridge since the drop structure is removed. On a four to three vote the Planning Commission (after refusing to allow the record to be clarified ) did the following: (1) Approved the removal of the condition requiring the drop structure, but ( 2 ) Required the developer to either do excavation of a detention basin on the adjacent Stonehurst property at a cost of up to $45, 000 or , if such excavation is not possible, then pay the $45, 000 regional detention basin fee, and ( 3 ) Line the creek bed with rip-rap or any means found effective by the Public Works Department of Contra Costa County -- such lining to cover approximately 165 feet of creek bank, extending from 50 feet upstream from the proposed bridge to a point 115 feet downstream -- with no limitation on cost . Our cost estimates for this range between $50, 000 and $200, 000 . All for ' a seventeen lot subdivision. It was County staff that originally requested the drop structure and culvert to be funded out of the $45, 000 contribution towards a regional detention basin. The Planning Commission has now modified that to require not only that contribution but in addition several times that amount as a potential additional special mitigation for this project even though its flood control contribution is agreed by all to be less than one percent of the overall water coming into the watershed at that point . Any stream bank improvements in this area will be August 7 , 1986 Page 4 virtually useless 'and will provide an unreasonable special benefit +to the adjacent property owners -- instead of using those County monies for a regional flood control solution. Such rip-ran or stream bank lining will aesthetically mar the creek, be shocking to the environment and serve no County purpose -- it simply (as one Planning Commissioner acknowledged) provides balm to complaining neighbors . By the Planning Commission ' s decision, it is further reopening the whole issue of creek mitigation and seeking to impose entirely new conditions. Such action is only appropriate if physical conditions have changed so as to require changed conditions of approval. Flood Control is advocating that the previously imposed condition would physically be ineffective and therefore must be changed. However , there was a previously adequate and approved mitigation measure imposed by the Planning Commission. The creek bed itself and the erosion problems have not changed since the imposition of that original condition. Therefore, the Commission has no legal basis on which to alter the original fee payment condition in favor of one now considered more pleasing to the complaining neighbors . The Commission should feel bound by the Board ' s previous decision unless physical conditions have changed. There have been no physical changes, therefore, the mitigation measures cannot be altered. On the basis of the foregoing facts, the subdivider is entitled to this appeal pursuant to Contra Costa County Code Section 26- 2 . 2404(b) ( 1 ) . Said section permits appeals by a subdivider , "from any decision concerning the tentative map, or the kinds , nature, and extent of improvements required for tine subdivision. " As previously stated, the Planning Commission decision concerns a condition approval for a tentative map and imposes specific conditions and improvements on the subdivision. Accordingly, the developer is entitled to an appeal before the Board of Supervisors. We appreciate your consideration in this matter and request that said appeal be scheduled at the first meeting of the Board of Supervisors in September . Very tru y yours , Brian D. Thiessen BDT:SDM:sba CC: client Tom Powers Nancy C. Faizden Robert I . Schroder Sunne Wright McPeak Torn Torlakson Planning Department 02-17319 - •.i - .. > tai lsI�• PUBLIC WORKS DEPARTMENT CONTRA COSTA COUNTY DATE: April 27 , 1987 TO: Contra Costa Coun*Pla n Comr�ission FROM: Milton F. Kubicek, De u y u i orks Director SUBJECT: Deadhorse Ranch Subdivision - No. 6443 Attached is information we submitted to the Planning Commission on September 19, 1986. It contains a report by the soils engineer, Terra Search, Inc. We plan to distribute this material to the property owners of Deadhorse Ranch on April 27, 1987. MFK:md dhrinfo.t4 Attachment J.Michael Walfo -Contra Public Works Di: Costa Public Works Department County 255 Glacier Drive Milton F.Kub cei. Martinez, CA 94553-4897 Deputy Director Maurice E.Mitch, April 27, 1987 Deputy Director File: Deadhorse Ranch Subdivision No. 6443 Charles Wood Hal Olson 5324 Alhambra Valley Road 22 Wanda Way Martinez, CA 94553 Martinez, CA 94553 Jim Farr Terry & Kathleen Schwartz 5320 Alhambra Valley Road 5312 Alhambra Valley Road Martinez, CA 94553 Martinez, CA 94553 Aldo and Irena Rocca Ruth Newman 4302 Alhambra Valley Road 127 Sheridan Lane Martinez , CA, CA 94553 Martinez, CA 94553 Dear Property Owners : At the last Planning Commission meeting it was requested that we provide the soils report on the erosion protection for the creek. Attached is a complete copy of our submittal to the Planning Commission. Very truly yours, Milton F. Kubicek Deputy Public Works Director MFK:md pcdhr.t4 Attachments - Report to the Planning Commission (September 19, 1986) - Soils Report and Channel Plan (September 8, 1985) - Report to Planning Commission outlining recommendations for creek improvements (July 24, 1986) - A copy of "A Review of Studies on Alhambra Creek and Its Watershed , Past and Proposed ," including maps showing proposed basin sites. (January, 1986) - Letter to Mr. & Mrs. Farr commenting on -concerns of May 90, 1986 (June 4, 1986) . a1 • s PUBLIC WORKS DEPARTMENT CONTRA COSTA COUNTY DATE: September 19, 1986 TO: Contra Costa County Plann ' g Commission FROM: J. Michael Watford, Pub is Works Director SUBJECT: Deadhorse Ranch Subdivision No. 6443 On July 23, 1986, the Commission considered a request by the Public Works Department to delete the drop structure from the Conditions of Approval for the Deadhorse Ranch Development. We recommended the drop structure be eliminated, and that the developer instead be required to install approximately $17 ,000 in rock slope protection in the creek. After hearing testimony by the adjacent residents and concerned citizens in Alhambra Valley, the Commission imposed upon the developer the condition of improving 160 feet of the channel with slope protection of some kind, to be determined by the Flood Control District staff, and to be installed in accordance with the Soil Conservation Service, Stream Banks Restoration Program conditions. We have since met with the developer and his engineer at the site , to explore what types of rock slope protection could be installed. We found the creek to be a very narrow, steep channel with significant signs of bedrock in the invert and sidewalls at many points. The steepness of the creek side slopes preclude the use of loose rock riprap and grouted concrete riprap as a single means of slope protection. We also determined that with the numerous bends in the creek, the amount of trash and debris that comes down the creek and the anticipated flow velocities, it is not desireable to use gabions in this water course as slope protection. As a result of the field meeting, we concluded that there are two possible methods for completely protecting the 160 feet. 1) The entire channel could be excavated and rock slope protection could be placed at 2:1 side slopes. This would involve removing all the trees off of both banks and laying back the existing slopes which would totally destroy the existing creek, or b) The lower portion of the creek could be concrete lined. This would involve installing soil anchors and rock bolts and ouniting the channel to a depth of eight feet, providing a concrete surface that in many cases would have side slopes steeper than 1 :1 . ;•Je believe the above solutions are unacceptable, in that they destroy the existing creek environment. We believe the Alhambra Valley residents want to preserve the natural creek as much as possible. We cannot give the developer approval to implement either of these solutions without concurrence by your Commission that this is what you really want. During the site visit it was obvious that only portions of the creek art suffering from erosion from the creek flows. A lot of the bank problems art from upper bank failure due to surface runoff. The developer commissioned soils investigation to substantiate our observations. We have enclosed copy of his report prepared by Terra Search Inc. , dated September 8, 1986. The report includes a map showing the areas and heights of the bedrock whic) the soil consultant describes as less erodible, underlying rock. Based on this information, we would .like to suggest that the revisec Condition of Approval be modified to require the developer to' rock-line the creek on the south side of the creek, 40 feet upstream and downstream of the rock slope protection, being placed by the developer for the outlet of the storm drains, approximately 115 feet of continuous protection. This woulc insure that the south side of the creek, which is the major area subject tc erosion from the channel flows, will be protected in the vicinity of the bridge and immediately downstream of the bridge to the existing foot bridge. In summary, we believe the condition of placing slope protection over the entire 160 feet of creek at the crossing is impossible to perform withou destroying the creek in the process. From the comments from your Cormission, we do not believe this is your intent. We request that yoc reconsider this matter and give staff direction as to what is an acceptable solution. Due to the approach of winter and the desire of the developer anc the adjacent residents to have the improvements installed before the winter runoff begins, we would appreciate you considering this item as quickly a: , possible. JMW:I1FK:md dhavcrk.t9 cc: H. Bragdon, Community Development D. Jewett, Public Works J. Murphy, Flood Control District J. Kerekes, Public Works D. Flett, Doug Flett & Associates 2 �aFr SOIL, FOUNDATION AND GEOLOGICAL ENGINEERS DDI"11 D RD A V r • / 1580 NORTH FOURTH STREET, SAN JOSE, CALIFORNIA 95112-4676, (408) 287-9460 Project No . 5335-E 8 September 1986 Boatright Enterprises ` 235 Main Street , -#8 Pleasanton, CA 94566-7322 Attention: Mr . Joe Boatright Subject: Subdivision 6443 Alhambra Ranch Alhambra Valley Road Contra Costa County, California ERODIBILITY STUDY Gentlemen: At the request of Doug Flett & Associates , Inc . , we have undertaken a study Of the susceptibility to erosion of the channel banks of Arroyo del Hambre Creek in the vicinity of the proposed road crossing . The proposed crossing is in a meander that bends northerly into the hillslopes on the north side of the Alhambra Valley for a distance of several 'hundred feet . Within this meander , the creek bottom has incised into bedrock, but the upper portion of the south bank of the creek is cut in valley alluvium. Bedrock in the site vicinity consists of tan to grey-brown , highly fractured and jointed , interbedded clay- stone , siltstone , and sandstone of Upper Cretaceous and/or Lower Tertiary age . This material is less susceptible to erosion than the overlying alluvium which consists primarily of clayev silt with lesser amounts of silty clay and gravelly sand . r In the vicinity of the proposed crossing , the creek channel is about 20 to 30 feet deep. The erosion of the lower 8+ feet of the channel banks is controlled primarily by the rainy season stream flow and is most pronounced on the out- side curves of the channel . The erosion of the upper por- tions of the banks is primarily nillslooe mass wasting con- trolled by hillslope sheet flow, soil saturation , and local- i--:?d soil slumps . 11822 DUBLIN BOULEVARD, DUBLIN, CALIFORNIA 94568, (415) 833-9297 Project No . 5335-E 8 September 1986 The erodibility of the bedrock material is not severe enough to require protection. The erosion protection needs to be considered only in those areas where the bedrock contact lies below the high stream water mark. In order to assist in 'placing the required rip-rap, we have surveyed this bedrock contact in the vicinity of the proposed crossing . This con- tact is delineated on the attached plan (Figure 1 ) . The encircled numbers are the estimated heights of the contact above the stream bottom. In many locations , this height is more accurately described as the height above the dry season surface level of the stream water . Should you have any questions or require additional informa- tion, please contact our office at your convenience . Very truly yours , Revie d� by: TERRASEARCF INC. Tom S. Makdissy, . E. Richard Rowland , C. E. G. Principal Engineer Senior Geologist Copies: 1 to Boatright Enterprises 3 to Doug Flett & Associates f r I + of R I _ 7 1 1 ( �•�a•Q c i 3 »i i I REMOv£ £X/STING 1 $R/GIG£8 O/S DQS£ Ll "2 I OFF,$/T£� wr ff's TAWJF! ° a<04 .rNr—t orrC ch T.q �� '1 1r a rarszrOrlpCf I 1 cts. ra —►� �r[tour[e[ errNe £a[n'L �'-I If �..•_—.1"�_�\ �� r i{ 1 �` _,� l t 'ter .�i � •�. Jo .coo, T tzr4 V's I,J ' "tL e' /C)VO Ducrrte,nom•.,. v-fog ��7 W/RfJ7RAn'l:0✓OIMTJ. OS� ` t ppt�i � ..�;,.� tr'10•:1fA. J�--..�-, ,�f. :l+:G •4GAt efAM uP U fL•rf7LD4upet �r ( —.10 Acp JO W. )R[.vC•xtf P .,,,. •'CL FF watt ET '�Yr,/ rL\SArr M- 4 p•?4 \\, 09 t! UPJ'' UK<CMWNYYR!A,t <.0/Y\ LiU;Ct 4-5 •• JA VL\ of e'FC r1 d°'RC W,rit~0 ` r0� S.rGL i1' t oo,l. e..�•pe�r.r CLF aJ' +ntJrrsrro�0..O+ror ELL as*K✓ T.9PlDGrW, .-.CAO>AN• , ` t »'`•��• r � Q 1 rw 1 . \Od n 1 c Ln m 2 i N i) u R N � l� G n :C" R � ..F✓ S2 r.. $ < �, zr� £ Ct (U� h (S to (I PUBLIC WORKS DEPARTMENT CONTRA COSTA COUNTY DATE: 3u1 v ?.a, 1986 T0: Contra Costa County Planning Co m'ssion FROM: Milton F. Kubicek, D putt' Di ector, Operations and Flood Control SUBJECT: Deadhorse Ranch Subdivision No. 5443 - Proposed Condition of Approval Revision In response to your Commission's suggestion, we met with the developer's engineer and area residents on July 16, 1986 and July 23,. 1986 to discuss mitigation measures that might be implemented if the drop structure is 1 deleted. The group did not reach a consensus on what should be done. RECOMMENDATION We recommend one of the following options be required in lieu of the drop structure condition: a 1) The developer shall install creek erosion control improvements equivalent to $17,000 in cost ($1,000 per lot) , or 2) The developer shall install rock riprap in the two washout areas discussed with the residents at the July 23, 1986 meeting (one upstream of the bridge on the north bank of the creek, and one downstream under the south end of the existing pedestrian bridge) . In addition, the developer is still required to pay to the County the $0.25 per square foot for the new impervious surfaces. This contribution , in excess of $40,000, represents his share of the Stonehurst mitigation basin. BACKGROUND Our memo of June 11, 1986 (copy attached) explains how the drop structure was added to the Conditions of Approval for this development , and why we now recommend that it not be constructed. The Deadhorse development creates large lots (5+ acres) which have a small but accumulative impact on the peak flow in the natural creek. At the new bridge crossing the peak increase in flow from the site into the creek is approximately 20 cubic feet per second , which when calculating before and after peak flows in the creek is less than a It increase. This increase is insignificant, but it has an accumulative effect when considered with other developments . Recognizing this problem, we prepared the attached report , "A Review of Studies on Alhambra Creek and Its Watershed , Past and Proposed ." The report, which was presented to the Martinez City Council last year, indicates our belief that the only meaningful way of mitigating for future urbanization is to implement regional mitigation detention basins . The construction of these basins would be funded by the new developments creating additional impervious surfaces . The increase in drainage from the Deadhorse development is a long-term accumulative impact and the appropriate mitigation is a contribution to the long-term solution of regional , government maintained mitigation basins. The increase in storm water discharge from the Deadhorse development will have a non-measurable impact on the existing, highly erosive creek. The creek banks are very steep, and the longitudinal channel slope_ is in excess of 3%. There are numerous points of bank failure as one would expect in a creek environment of this kind. Fortunately, the creek bottom appears to be relatively stable in the vicinity of the bridge, and the erosion appears to be mostly the side slopes and the upper bank areas where the slopes are steeper than 1-1/2:1. The bridge and its abutments will be founded on rock. There is some question in my mind as to the extent of erosion mitigation that the Deadhorse development should have to bear. Other developments in the Alhambra Creek Watershed are not being required to address off-site erosion problems in the natural creek. However, due to the fact that there will be a small increase in flows into the creek, and that the regional mitigation basin may not be installed for several years , as it is tied in with the Stonehurst development, we believe imposing one of the erosion improvement conditions specified above is appropriate. Everyone must realize that Alhambra Creek and its tributaries are erosive creeks above the immediate downtown area. These creeks will continue to erode, and the banks that are already too steep will continue to fail until they reach a point of equilibrium. This process will exist at the Deadhorse Subdivision crossing site until someone completely rebuilds this reach of creek. MFK:md pc7.25.t7 Attachments (3) cc: Harvey Bragdon , Community Development Dir. Doug Flett, Engineer, D. B. Flett & Associates Joe Boatright, Developer, Alhambra Valley Ranch, Inc. L�A ( n rr. r.�c:nrt:xINC FL.LTT K ASSO CIAT[5. INC. C - 0f1 ,Ciro) Lanc, Suirc '_0''i. L:ifjyctrc, (alifurnia 945-19 (.415) 283-0231 April 14, 1987 Milton Kubicek Contra Costa County Public Works Dept . 255 Glacier Drive Martinez , CA 94553 Dear Milton, Following the Planning Commission meeting of April 7th , I visited the site, reviewed the Geology Report , and the instructions given the contractor for placement of the rip rap in the creek . This has confirmed our previous conclusion that installation of rip rap erosion protection on both sides of the creek over the full 165 ft . length currently required by the condition of approval is impossible without either regrading the creek or installing concrete gunite lining on the bottom 8 ft . of the existing banks. The erosion protection outlined in your memorandum of September 19, 1986 has been installed . The installation was performed prior to the construction of the new bridge and was inspected by the Public Works Department . As far as I know, the erosion control has been satisfactorily installed . The property owners concerned have been kept appraised of the construction and installation of the erosion protection. The work has been done with their prior knowledge. Mr . Rocca granted our contractor a right of entry to enter upon his property and install the rip rap in areas outside of our existing easement . We were told by second hand information that Mr . Wood was agreeable to having the rip rap placed on the bank as far :-:e=_t a an existing pipe installed on the creek bank . As this location is at the property line no right of entry was required . The erosion protection required by the current condition is not recommended by the geologist and is impossible to perform without destroying the creek in the process. The erosion protection recommended in your memo of September 19, 1986 has been installed with the full knowledge and cooperation of the affected property owner . Si e el DouglA B. Flett TINNING & D1=LAP CHARLES A. WOOD, JR. ATTORNEYS AT LAW T. H. DELAP II88S-19741 JAY P. SANDERS' A PARTNCR5HIP INCLUDING A PROFESSIONAL CORPORATION A. B. TINNING 11887-19651 KEITH HOWARD ANTHONY W. HAWTHORNE 1299 NEWELL HILL PLACE, SUITE 300 OTHER OFFICES NANCY J. CASALE WALNUT CREEK, CALIFORNIA 94596 RICHMOND CALIFORNIA LISA A. WEGER 14151 935-0700 KENDALL A. LAYNE MAILING ADDRESS 'A PROFESSIONAL CORPORATION P. 0. BOX 5246 L August 10 , 1987' - Contra Costa County Planning Commission - Community Development Department (Robert Drake) 651 Pine Street Martinez , CA 94553 Re : Subdivision 6443 Dear Commissioners : From time to time I have been invited to attend on-site meetings with the developer of Alhambra Valley Ranch , neighbors and Mr . Kubicek regarding condition #24-L , which deals with erosion control along creek banks at the subdivision property. Presumably the invitation was made to me because my property lies adjacent to and westerly of the entrance to the subdivision , the rear line being somewhere in the Alhambra Creek . The purpose of my writing you this letter is to tell you that the repeated diminishing of condition #24-L from the original "drop structure" to the placement of loose rock to a height which is not necessarily consistent with the high water flow in that area is obviously at the developer 's request, albeit for the protection of the developer 's bridge and creek embankment thereunder . It is not entirely clear to me just how many lineal feet of the south side of the creek westerly from the right of way is involved with my property . Suffice it to say that it is very minimal and at the request of the developer I offered a proposed form of license to perform the work , but there has been no response to this offer . I have now received a copy of a letter to the Planning Commission from the deveioper 's attorneys stating , in the next to last paragraph , that property owners with creek bank property adjacent to the developer 's right-of-way will be responsible for the maintenance of all improvements to the creek banks installed by the developer . Please be advised that this statement is completely untrue as to my property . I have no intention of assuming the developer ' s maintenance burden for the benefit of TINNING S. DELAP Page Two August 10 , 1987 its improvements and creek crossing . Furthermore , I have no intention of creating an easement for the benefit of the developer . I don 't think there is any argument that the existing rock placed in the creek channel by the developer was improperly done and for this reason, among others , I do not intend to assume the cost of somebody else 's negligence . Also , to the extent that any of the existing rock has been placed upon my property, it was done without my permission . As I said before, I am willing to provide a limited license for the purpose of installing the rock needed to protect the developer 's crossing and I would be willing to provide another license at the time any maintenance of the rock placement is required . Otherwise , I do not wish to assume the developer 's burdens for the use and benefit of the developer 's subdivision . Very truly yours , CHARLES A. WOOD, JR. J CAW/7lc u CC . Aldo Rocca , et ux . James Farr , et ux . Steven D . Mellema, Esq. LAW OFFICES OF BRIAN D THIESSEN THIESSEN, GAGEN & -IcCOY WILLIAM E.GAGEN.JR A PROFESSIONAL CORPORATION GREGORY L MCCOr 279 FRONT STREET PATRICK J.McMAHON M.SUE GREICAR PO BOX 218 OF COUNSEL MARK L ARMSTRONG DANVILLE CALIFORNIA 945260218 WILLIAM W.BASSETT LINN K COOMBS JOHN B CLAUSEN TELEPHONE 14151 8370585 MICHAEL W CARTER TELEX!353433 VICTOR J CONTI FAX;.1151 8385985 ROBERT M.FANUCCI RICHARD FRANKEL JEFFREY G.HANSEN BARBARA DUVAL JEWELL CHARLES A.KOSS CYNTHIA LOVE MAREK MICHAEL J.MARKOWITZ STEVEN D.MELLEMA ALLAN C.MOORE August 31 , 1987 DIANE J.MORIN EVELYN SPIROU '- STEPHEN W THOMAS —_ Mr . Karl Wandry, Director Community Development Department _ Contra Costa County 651 Pine Street Martinez , CA 94553 Re: Dead Horse Ranch/Alhambra Valley Ranch Subdivision No. 6443 Dear Karl : For more than a year now County Flood Control , the developers of Alhambra Valley Ranch, neighboring landowners , and the Community Development Department have been trying to resolve the issue of the flood control drop structure, Condition No. 24-L, in the Dead Horse Ranch/ Alhambra Valley Ranch subdivision conditions of approval . Time is becoming critical and final action by the Board of Supervisors needs to be expedited. Back in June of 1986, Flood Control proposed modifications to Condition 24-L. The proposed modifications met with opposition from surrounding landowners for a number of reasons. The Planning Commission at that June, 1986, meeting, asked the property owners, the developer, and Flood Control to work out an acceptable resolution and return that to the Planning Commission. Meetings were held on July 16 and July 23 of 1986 , to determine appropriate mitigation measures. No consensus was obtained. The issue then came back to the Planning Commission on July 29 , 1986 . The Planning Commission approved the spirit of the modification. The approval, however, left the actual determination of necessary improvements to Flood Control . This decision of July 29, 1986, was appealed by the developer to the Board of Supervisors. On November 18, 1986 , the Board referred the issue back to the Planning Commission. Mr . Karl Wandry, Director August 31 , 1987 Page 2 Finally, on May 12 , 1987 , the Planning Commission approved the conditions proposed by County Flood Control. The language from the May 12, 1987 Planning Commission meeting was incorporated in the resolution adopted by the Planning Commission on August 11, 1987 . During the period between the approval and the adoption of the resolution, the property owners, the developer , and Flood Control met at the bridge site to make sure there was an understanding of what needed to be done. Our office also made clear what language was necessary for the resolution. Nevertheless, in the resolution as passed, there is ambiguity that needs to be clarified so that the resolution can quickly pass to the Board of Supervisors . The particular concern with the resolution is exactly who are creek bank owners and what are the responsibilities toward maintaining the creek improvements. The approved resolution is attached hereto as Exhibit "A. " This Condition must now go to the Board of Supervisors for final approval because the Board of Supervisors had referred it to the Planning Commission for a determination to. then be approved by the Board. The uncertainty with regard to the exact meaning of the maintenance conditions has placed the condition in limbo. It has not been scheduled for the Board of Supervisors , yet it is imperative that it be done as quickly as possible. The developer must do necessary improvements to the creek bank before the rainy season begins. The only way those improvements can begin is if the Board of Supervisors finally approves the condition. We are really in need of Board of Supervisors ' approval in the quickest possible manner . In order to expedite this approval we propose that Condition 24- L, as it is now written, go directly. to the Board of Supervisors .and that the Community Development Department ' s staff report reflect clarification of certain terms within the condition. Our concern is with the parenthetical sentence, ( "This policy includes the requirement that the creek bank improvements are to be maintained by the adjacent property owners and that the property owners are to provide the necessary rights-of-way. " ) It is our understanding that "adjacent property owners" means all of the owners of the creek . This includes the creek easement owners as well as the homeowners that actually own creek property. Each owner maintains their own creek property. We believe this approach was approved by the Planning Commission but not clearly incorporated into the Resolution. Mr . Karl Wandry, Director August 31 , 1987 Page 3 Similarly, the next sentence, "Covenants shall be recorded with the final map adjoining the creek bank notifying perspective buyers that they would be responsible for maintaining the cFeek banks . " , means that the final map for the Alhambra Valley Ranch, Subdivision No. 6443, must indicate that restrictive covenants for each of the properties within the Alhambra Valley Ranch will be recorded notifying the prospective buyer that they are responsible with all other easement owners for maintaining the creek bank which they own, that is the sixty (60) foot creek easement over which the entry bridge and roadway pass. We think this intent is clear from the following sentence of Condition 24-L which states that, "The notice shall stipulate that as owner of a lot in the subdivision they will share responsibility for maintenance of the creek bank improvements required as part of the approval of Subdivision No. 6443 . " That is, the Alhambra Valley Ranch property buyers will share responsibility for maintaining the creek bank improvements on their property. Their property being the sixty ( 60 ) foot creek easement over which they have a property interest . The creek bank improvements on other people ' s property will be maintained by the owners of that creek bank . Additionally, the owners of lots within the Alhambra Valley Ranch will be responsible for maintaining the existing retaining wall which supports the road in the easement . That maintenance is not specified in the condition, but is understood, by the developer and is in truth an existing legal responsibility of the owners of the easement so long as the maintenance is necessary to preserve the easement . Our concern is that some neighboring property owners still want to fight the development and will contend that Alhambra Valley Ranch, by modified Condition 24-L, must actually maintain all of the improvements that Alhambra Valley Ranch installs, whether that improvement is on Alhambra Valley Ranch property or not . This just is not the case and was never the intention of the Planning Commission nor Flood Control . We had proposed to all the property owners they sign a letter of interpretation and submit that letter to the Planning Commission prior to actual adoption of this language. An attempt was made to obtain such a response from all of the owners , but once again some owners recognized an opportunity to delay the project and have failed to respond. What we need now is quick action on the part of the Community Development Department and the Board of Mr . Karl Wandry, Director August 31, 1987 Page 4 Supervisors to approve this condition with the proper under- standing of its meaning. Alternatively , the Board could adopt a different Condition 24-L incorporating language to clairfy4the requirements of Condition 24-L as passed by the Planning Commission. Such -a proposed revised Condition 24-L is attached hereto as Exhibit "B" . Thank you for your consideration of this matter . We look forward to your response in the very near future. Ve y t ly yours, ark L. Armstrong MLA/SDM/ct 02-17319 cc: Bob Drake Milton Kubicek Doug Flett Sandy Barnett ALTERNATIVE CONDITION 24-L 1 . The applicant shall excavate a detention basin with the cost of excavation no to exceed $45,000; or if excavation is not possible because Flood Control District has not acquired rights to the basin, contribute 25C per square foot of added impervious surface area designated for improvements in Drainage Zone 5 . 2 . The south side of the creek bank shall be rock lined 40 feet , upstream and downstream of the rock slope protection being placed by the developer for the outlet of the storm drains , approximately 115 feet of continuous protection. Grouted rock will be used only where there is no alternative available. This work shall be subject to review and approval of the Flood Control District and in compliance with the stream bank restoration policy of the Flood Control District . (This policy includes the requirement that the creek bank improvements are to be maintained by the owner of that improved creek bank . ) Covenants shall be recorded with the final map for Subdivision 6443 notifying prospective buyers of lots within Subdivision 6443 that those lots individually share responsibility for maintaining the 60-foot creek easement improvements and retaining wall supporting the roadway with all owners of the 60- foot creek easement . s CONTRA COSTA COUNTY PLANNING COMMISSION STATE OF CALIFORNIA 12 May 1987 - Tuesday Pursuant to notification, the Contra Costa County Planning Commission met for a regularly scheduled meeting at 7 : 30 P.M. , in the Board of Supervisor' s chambers, County Administration Building, 651 Pine Street, Martinez, California. ROLL CALL: Present were Planning Commissioners: Emil Accornero, Louise P. Aiello, Leslie K. Davis, George C. Feliz, Kathleen Nimr, Juanita Whitney and Linda P. Best. Present from the Community Development Department Staff were: Karl L. Wandry, Mary Fleming, Robert Drake, James Kennedy, Arthur Beresford, Steven Wright, Milton Kubicek of Flood Control District and the Recording Clerk. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + REFERRAL FROM BOARD OF SUPERVISORS: SUBDIVISION: CONTINUED PUBLIC HEARING: SUBDIVISION #6443 (DEADHORSE RANCH) This is a referral from the Board of Supervisors regarding a proposed modification to flood control requirements provided for Subdivision#6443 . The subject property is described as being located approximately 1, 000-ft. , north of Alhambra Valley Road with access from a private road located between #5302 and #5324 Alhambra Valley Road: Martinez area. (Continued from 4/07/87 ) RD/ASA MR. WANDRY: Milton Kubicek of Flood Control District will present this item to your Commission. MR. MILTON KUBICEK: Madam Chair, Members of the Commission, you will remember that at the last hearing you requested additional information on the totals at the site and the proposal that we had of just rock lining the south bank of the creek (complaints from audience of not being able to hear Mr. Kubicek) . CHAIR BEST: Perhaps you can use that microphone, Mr. Kubicek. MR. KUBICEK: As you will recall, at the last hearing, you wanted additional information on the soils report which was a two-page report indicating where the developer' s soil engineer felt the rock line was in the creek bed. Since then, we also met with---we provided that information to your Commission and to the property owners at the bridge crossing who also met with Supervisor Fanden and the property owners, the contractor, the developer, the developer' s engineer at the site and reviewed the matter about a week and a half ago and last Wednesday, two members from the Flood Control District staff and our construction division met with the Developer ' s engineer and the soils engineer for the developer and Mr. Paul Siedleman who is a semi-representative, I think, of one of the property owners. As a result of that meeting in the field, we indicated to the developer and to Mr. Siedleman, what we felt should be done in the creek and that' s presented in the paper we submitted to you tonight. we 've also provided a copy of that memo to several of the- property owners who are here tonight. The proposal was the same as far as---we feel it ' s the south bank of the creek as shown by these sections here. , Let me explain the sections to you real quickly. The creek here is shown coming at you. You are looking basically upstream. The brown line basically shows the banks of the creek. This section here is upstream basically in the vicinity of the existing bridge of the storm drain pipe and the lower section here is downstream by the foot bridge that goes across Mr. Rocka' s property. The orange line shows approximately where the rock line is under- neath and our contention is that this is the main failure in this area in here is because the bank gets heavy and slides down the rock incline. Protecting the toe here isn' t going to solve-'this upper problem. It' s going to keep some of this from weathering and wearing and it ' s going to wear and weather over time; but, it' s a slow process. If you notice on the south side of the creek which is this side over here, there is some rock protruding but down in here where in fact the bank has failed quite a bit underneath the pedestrian bridge, there is no rock and the high velocity and steep grading of the creek is causing the erosion on that side where in fact there is no hard material or semi-hard material which is represented by the orange to keep it from eroding. Short of reconstructing the entire creek, we feel this is the least disruptive to the creek that will ensure that the bridge will be safe and that some of the problems in the vicinity of the bridge crossing are fixed. We can fix the entire creek once and for all and that would be to put in a concrete lining or something very permanent; but, we' re talking about starting at one end and working our way down. We don' t believe that is what the community wants as a whole. The only other alternative other than putting in this rock that' s here is if we want to build a conventional rock-lined channel with stable rock slopes, we would have to shave these banks here so in fact we could get the rock to stand. That, then, would take the vegetation off the top of the bank. The other alternative would be to put gunite or something in the lower portion of the creek and that also would protect it from any erosion. Another alternative that is very extensive and probably the only way you could save the trees that are there is to gut out the whole bottom part of the creek and line it with gabian cages. That, along with the shaping of the entire creek is a significant project and that ' s why we' re back here. We want to know exactly what you want. We don' t want to do something that somebody' s- going to come back later and say, well, you tore up the creek; you destroyed the creek. We 're criticized for not being environ- mentally sensitive and we don' t want to get into that predicament here. With that, I ' d like to answer any questions you might have. CHAIR BEST: I have one question. The points in the memo that you gave to us this evening, do those necessitate any change in the condition you' re recommending? MR. KUBICEK: No. Well, let me retract that. There are two small rock pockets on the north bank that are right in this area where this soil mass has come down and it' s overhanging this a little bit and we' re saying to streamline that, we're suggesting those rock pockets be put in---I think those rock pockets are something more related to the drainage pipe that the contractor put in and it has since causes a little bit of the over-mantle material to erode. We' re saying, let ' s try and preserve this as long as possible by packing it in. Everything you do in the creek in terms of a temporary improvement is just that---it is just a temporary improvement and it has to always be maintained even where we build conventional channels, we have to maintain them; we have to desilt them; we have to repair the banks. We spend approximately half a million dollars a year maintaining the channels that we in fact construct. Natural channels, it' s even worse because they' re so unpredictable. So, we' re suggesting that to give this bank a little more life, we would go ahead and pack back that rock pocket right there. CHAIR BEST: Are there other questions? COMMISSIONER NIMR: Wasn' t the original condition, and that was what we had discussed the last time, the preferable condition was obtaining the detention ponds on the property or on the Stonehurst property. Is that option just closed? MR. KUBICEK: No. That option is still very much alive. It is our intent to implement the Stonehurst detention basin as soon as we can get the developer to donate the right of way. If we can get the developer to donate the right of way and once it settles down as to who owns the property---because I understand they' re in bankruptcy or something of that sort or they' re in the process of refinancing the property in some fashion, if we can get the right of way, we would suggest that the money that comes in from Deadhorse, the $45, 000 be used to go up to Stonehurst and start that process. So, with Stonehurst, with Deadhorse, we see that basin as being installed and we' re very optimistic about it. We' re also looking at working out an arrangement with East Bay Regional Park District, across the street if we can, to enlarge the basin and actually create what we feel would be an open space of wild life area where it could serve a duel purpose---open space and provide additional detention. COMMISSIONER NIMR: What you' re proposing then is that they contribute the $45 , 000 and that' s about it because what they've done they' re already done;, that the $45,000 would be used specifi- cally for that purpose rather than going in with the City of Martinez and their projects? MR. KUBICEK: The $45 , 000 is in the condition of approval and that would---that ' s the 25 cents per square foot of impervious surface, that money would be combined with Stonehurst; would be combined with money the City has already collected and the County would have collected on any of the developments in the area that were required to put up that money and we would then implement a regional detention facility that would serve both the County and the City areas. That ' s the plan we' re developing. COMMISSIONER NIMR: So, you plan to do it that way. One of the complaints I think I 've heard is that all the developments in the creek area are not having to pay that fee. Are we doing that pretty consistently now? MR. KUBICEK: In the Alhambra Valley area, I think the Deadhorse Ranch and possibly one other development are the only developments that have been approved out there in the last 18 months that we are aware of . COMMISSIONER NIMR: Don' t we impose it on other smaller develop- ments or only on major subdivisions? MR. KUBICEK: It should be on all developments and I 'm not aware of another other developments or minor subdivisions that have been heard recently that have been approved. COMMISSIONER NIMR: Ah, yes, but theoretically, they should have the fee as well. MR. KUBICEK: At the time of passing of Stonehurst and Deadhorse, it was pretty much established that all developments in the Alhambra Valley would pay the minimum contribution to infra- structure of $17 , 000 per lot and I believe that ' s still the policy. COMMISSIONER DAVIS: Mr. Kubicek, at the last meeting on April 7th, I have a note---and I don' t remember if it was brought up in the public hearing or not, relative to adding a deed notification to the purchasers of Subdivision #6443 that they're purchasing a lot that shares responsibility for the maintainable of the creekbank improvements required as part of the approval for this subdivision. Did we discuss this at the last hearing or is that just something that--- MR. KUBICEK: I believe there was some discussion at the meeting and I believe the developer' s representative said something about it and I believe Mr. Farr suggested that the creek improvements be maintained by the owners of the bridge---it' s a group. I believe the developers are receptive, including the creek work within the road right of way as a part of the bridge. I believe they' re agreeable to that. Whether they would be agreeable to or you wanted to impose on them whether they were agreeable or not, the entire maintenance of the improvements, I think that ' s something you would have to consider. COMMISSIONER DAVIS: But, it ' s not part of your recommendation? MR. KUBICEK: I would think that the improvements within the road right of way underneath the bridge should probably be included with the bridge as a part of the bridge just like the storm-drain pipes that come down the right of way there and discharge into the creek and the concrete headwalls are in the creek are considered part of those private improvements. So, the maintenance agreement for the bridge should probably address all those improvements when it ' s written up and the work within the creek within the confines of the right of way would be very appropriate to include that as part of the facilities being maintained. COMMISSIONER DAVIS: Thank you. COMMISSIONER FELIZ: Mr. Kubicek, according to the letter from Mr. Flett dated April 14th, the second part of the revised condition has in effect been done at least in reference to the rock lining of the 40-ft. , up and down stream. Is that your understanding? MR. KUBICEK: No. There are significant corrections that need to be done to the rock. Most of the rock is undersized and needs to be replaced or redone in some fashion to assure us that in fact the size of the rock is not going to go down stream. If you look at our memo, one of the things in the first item alludes to the rock being too small and the suggestion is there that we felt that the use of concrete grout was not in our purview to say yes or no and I have directed staff that I believe it is in our purview to say no to grouting the undersized rock. We feel that would not be in keeping with what you want done in the creek; it would be contrary to what we've been talking about for the last 9 months. We' re not receptive to grouting of the rock on the south . bank because the contractor used rock too small. The rock pockets on the north bank and where they've had to put rock in and around the outlet structure and the only way you can hold that rock in there would be with grout then we feel that ' s the only alternative and, therefore, it should be allowed in those instances but it should be minimized. That' s the approach we' ll take. COMMISSIONER FELIZ: I assume you' re referring to the memo that was on the desk this evening? MR. KUBICEK: Yes , I am. COMMISSIONER FELIZ: I haven' t had the opportunity to read that. Thank you. The other sentence may cover this in effect---may cover the conditions you already mentioned: "This work shall be subject to review and approval of the Flood Control District and in with stream-bank restoration policy of the district. " So, in effect, your memo is carrying out this particular provision in the revised condition? MR. KUBICEK: Yes, it is. COMMISSIONER FELIZ: Thank you. CHAIR BEST: Any further questions? If not, then we ' ll hear from the applicant MARK ARMSTRONG, Attorney, Thiessen, Gagen & McCoy, 279 Front Street, Danville, California, representing the applicant. -I ' ll be brief because since I think Milt accurately stated the circum- stances. With respect to the deed notification that Commissioner Davis brought up, I ' ll confirm what we said last time. We ' re in agree- ment with that. As to the obligation to maintain, we agree with Mr. Kubicek that it would be appropriate to require the homeowners to maintain the system with the maintenance agreement the area within the right of way. Beyond that, there really isn' t any relationship between this project and that additional improvement that ' s being done that would justify those homeowners continuing to maintain a common area of the creek---well, an area of the creek that' s owned by another party essentially and they have no access to. With respect to the review and redoing of the rock that has already been placed by the contractor, we' re aware of that condition as a result of going out to the site with Mr. Kubicek and others after that letter was written by Mr. Flett and we will work to comply with that condition and note that the condition requires approval of whatever placement of rock and erosion measures that are required to be approved by the Flood Control District. That ' s really a question of compliance and we will have to comply with their requirements in order to obtain a final map approval. I would note that Condition #1 that staff is recommending that you provide for in Condition---as part of Condition#24-L ( 1) , that is the general condition that is being applied in the Alhambra Valley area and you recall about a year or so ago, that was the result of a lot of meetings and a general consensus in terms of a master detention flood control plan for the area and a general condition of approval that would apply to any developments that come through. Number 2 is really an extra specific improvement or requirement that goes to this property in particular and in that regard are not related and we are doing something extra as Condition #2 we are going to be complying with Condition #1 , of course, is one of the other developers in the area. At this point, as I understand it, in terms of that general condition being applied to all development in Alhambra Valley, I don' t believe that it has been provided for as an ordinance of any sort that would be applicable to building permits being issued, so I suspect that there were any single family lots that yet to be built on at this point and don' t require entitlements such as a subdivision and it would not be applicable perhaps that ' s the reference of Commissioner Nimr has. That can be remedied by ordinance but you simply can't propose a condition on a lot that has already been approved and simply a building permit has yet to be issued so that could be the problem some people have expressed an opinion about. If any one has any questions, I would be happy to try to answer them. CHAIR BEST: Are there any questions? MARK ARMSTRONG: Good. Thank you. CHAIR BEST: Thank you Mr. Armstrong. We ' ll hear from anyone to speak in support of this application. Any in opposition? JAMES FARR, one of the property owners in the Deadhorse Ranch Subdivision. Good Evening. CHAIR BEST: Mr. Farr could you speak directly into the microphone so everyone could hear. JAMES FARR: Yes, my name is James Farr and I am one of the property owners. I 'm a little in the dark tonight. We had a meeting out there with Nancy Fanden and most of the representatives and I was just handed this information this evening by Mr. Milton Kubieck. I had very little time to read it and really don' t understand what he is talking about. I appreciate it if we would continue this and have an opportunity to digest this information, find out where it ' s coming from, what the developer has to redo, what' s in there that is not right, and just find out what this all means. In regards to the ----agreement to protect the bridge creek crossing and the areas underneath the creek, originally this subdivision was approved- with 165 lineal feet of creek improve- ments. If Mr. Kubieck and the soils engineers don' t feel this bank should be tested at this time, it should be left alone and originally everybody said that 165 feet of creek improvements were needed and necessary, I like to extend those boundaries to 165 feet. What the sum line is we built the retaining wall within 10 feet of the original bridge which is within 10 feet of the new bridge because we had a landslide. That retaining wall is now supporting the new road and the new abutments. If that retaining wall has any problems and it is outside the 60 foot, then what they are saying is it is my problem to fix not only my retaining wall but also the supporting structure supporting their new road and their new bridge, and I feel that it is unjust and unfair. So I would appreciate that this was extended to cover the total 165 feet, like originally was on the conditions and I believe that was centered on the bridge which needed to go 82 and half feet each direction. Again I would appreciate if we could continue this so we could find out exactly what the Flood Control people are talking about. Thank you. CHAIR BEST: Thank you Mr. Farr. Are there another speaker? HAL OLSEN, President of the Alhambra Valley Improvement Association, a mentioned was made of the wording the deed so that the people who buy the property will help maintain the creek, I think it is the only fair thing to do and I certainly think they should help maintain all of this and why should the existing owners, two or three of them down there, suffer that maintenance. The south bank has been put in wrong as you see in your own letter which was given to you tonight I glanced at it very quickly and not enough time to really to digest it, but it has been put in wrong, the rock has to be taken out, Mr. Kubicek is saying that grouting rock that ' s put in properly is not a good procedure, we were also told that cut out walls are needed and I certainly attest to that. I got them all around my place. If you don' t have them, it just undermines everything. That' s not in, this thing is a state of flux. The north bank has very little protection. The other thing I heard so far is a couple of pockets near a pipe. A pipe which by the way is a drainage pipe which by the way has been overlooked until now. We have a big 25 foot hole there instead. We certainly think this thing should be continued. It is very difficult to get material and rebuild rapidly in the prevailing five minutes before the meeting and try to make heads or tails of this. Thank you very much. I hope you will continue it. CHAIR BEST: Thank you Mr. Olsen. Is there another speaker? I there are no other speakers , Mr. Armstrong you have the right of rebuttal. MARK ARMSTRONG: Couple of brief points. As to the request for a continuance, I would remind the Commission that last time this was continued about five weeks ago it was for the purpose of providing the Commission and interested parties with a copy of the geology report that was made available earlier to the staff , that has been made available, the other purpose was to provide for a site inspection, site inspection has taken place. The information Mr. Kubicek has provided here I understand it, I haven' t seen it as well as my understanding is that it deals with a part of the question of compliance with that condition of approval and the adequacy of the improvement that have been put into date and will ♦ Y be put in. That is really not the issue here, that' s a question of compliance if Mr. Farr or anyone else has any disagreement with what Flood Control ultimately approves, of course, they have the remedy of administrative appeal on the issue of whether or not improvements are consistent with the condition of approval. As to maintenance question, again we will support the recommendation of Mr. Kuicek to obligate these property owners who have no frontage on the creek other than their easement, essentially, which we have said is appropriate for an obligation to maintain would seem to be inconsistent with the common law provision for maintenance of someone ' s own creek side. In large part, the creek area that -is being improved is upstream of the proposed development too. So we will request that you support the recommendation of staff and modify the conditions accordingly. Again, if you have any questions, we will be happy to try to answer them. CHAIR BEST: Are there questions by the Commission? Thank you Mr. Armstrong. MARK ARMSTRONG: Thank you. CHAIR BEST: At the matter listed before the Commission, we have had a request for a continuance for residence in the area to review what Mr. Kubicek has given us tonight. What is the is to be done with the Commission on that? COMMISSIONER DAVIS: Mr. . Kubicek this is a referral from the Board of Supervisors. Does that mean that what we decide is going back to the Board of Supervisors or does a final decision on our part tonight? MILTON KUBICEK: The matter was appealed to the Board by the developer that the condition that was opposed was too onerous and we concur that we felt that the improvements were more consistent with what we were trying to accomplish in this particular area here with needs, and it was decided that, if in fact, you understood that what was actually being proposed what would have to do with the creek to protect the 165 feet which would be to tear out the banks and actually rebuild them if you really mean that in that way, in fact, the Board referred it back to get a clarification. Do you want us to do that? Did we really have complete flexibility here? We don' t think we have complete flexibility. We think that we have to have an environmentally sensitive solution. COMMISSIONER DAVIS: Mr. Kubicek, I don' t know how to be any clearer with this question. Is this a recommendation for a Board decision or is the final decision resting with the Commission. MILTON KUBICEK: I don' t know. If your decision is to require the improvements we outlined, I think it will die here. COMMISSION DAVIS: Let me explain to the Commission what my problem is. If this is a referral from the Board of Supervisors that we are going to make a decision and then it is going back to the Board for their stamp of approval or amendment, then I have no problem in making a decision tonight because I believe the residences will have another opportunity to speak. But if the final decision is being made here, then we need to talk about it ,a little bit more. So my question is will it automatically go forward to the Board of Supervisors or if the final decision here pending appeal. CHAIR BEST: Could we just recommend it and go to the Board? COMMISSIONER DAVIS: We could choose to send it back to the Board on recommendation. MILTON KUBICEK: Basically it will go back to the Board only if it is appealed. Your decision tonight is to appeal. COMMISSIONER BEST: Let ' s say right now for the sake of argument I were to move approval of the amended conditions as proposed by Public Works with the addition of notification conditions as a referral back to the Board. It would automatically go to the Board of Supervisors? MILTON KUBICEK: That is the recommendation by your Commission to the Board of Supervisors -for the change because if we did so then it is your purview -- COMMISSIONER BEST: To refer it back to the Board with a recom- mendation. MILTON KUBICEK: My impression is that the Board does not want to see it. COMMISSIONER BEST: I 'm sure that true, Mr. Kubicek. I think we are going to send it back to them, Mr. Kubicek. COMMISSIONER NIMR: I think we need to go back to square one on what the original thing was here. That we had to find a way to mitigate what went into the creeks in this new development and the original idea was that Stonehurst and Deadhorse would be developed together and that both of them would be taken care of together, and so the Board put a condition on it having to do with a structure that the Public Works Department now feels is unacceptable. So we are still back to square one trying to find a way to mitigate what Mr. Kubicek describes as a very small amount into the creek but it still has to be mitigated, somehow and in view of the fact that Mr. Sidelman, who is an engineer representing one of the owners out there, was involved in this meeting that can to some sort of consensus and the final paragraph of this memo -from Mr. Kubicek says that there is still is going to a response from some agreement that was made with other homeowners. And it may be that even we ' re kind of close. I don' t know. So I was thinking that if we could finally get the information together in a timely way so that everybody can agree on some consensus that maybe we could do it. I think that one of the problems has been that there has been a lack of trust in either the contractor, the developer and the county to make sure that the conditions , namely, that the creek does not erode more than it is now. We know there is already a problem there and have not been met. As someone from the community pointed out that some of the things that have been done, haven' t been done properly, and I think that we are moving in the direction of a little more confidence in people seeing that things are being done differently. So I would really like to try to put it off for a couple of weeks and see if we could finally get a resolution because all we are going to do is send it to the Board and maybe they will send it back again. CHAIR BEST: A comment given the agenda we have coming up and the length of time we have been dealing with this, Commissioner Nimr you are correct we are very close and if it is going to the Board does afford those couple of weeks perhaps to really come to a conclusion. COMMISSIONER DAVIS: Another thing that I think is important what I was hearing was that the community would like and I think that was the spirit of our motion the last time, we were not telling you to rip out the creek for 165 feet but asking you to take responsi- bility for that much and find some kind of a way of assessing that responsibility to this development and I think that' s what the people are kind of asking us to do, is to have this development take that responsibility somehow, and I think that ' s what I would like to see. Not necessarily have to do it any specific way. I think if we left it flexible so that you could decide how it would be done. But I think maybe if we gave it a couple of more weeks maybe we finally can come to some consensus where people would find it acceptable. But barring that, I can accept the idea that we just drop the conditions with nothing to replace it. CHAIR BEST: I don' t think it has been suggested that we drop the condition. The original proposal is now being replaced by some- thing and that ' s what we replace it by and now we are being asked to drop that. COMMISSIONER DAVIS: Madame Chair, I am prepared to move that we refer this to the Board with the recommendation to approve the condition as recommended by the Public Works Department and our most recent staff report with the additional condition requiring a deed notification to the property owners that reads approximately: "You are purchasing a lot that shares responsibility for mainte- nance of the creek bank improvements required as part of approval for Subdivision 6443 . " My intent in this motion is to see this moved on with the hope of eventual timely resolution. we spent a considerable amount of time on it. I can see us spending even more and I have a difficult time when the Commission continues and continues and never comes to a decision. I am comfortable with these conditions as recommended. COMMISSIONER FELIZ: I second the motion. CHAIR BEST: Is there any further discussion? ti. COMMISSION NIMR: Are you talking the consensus items that are bulleted on -- CHAIR BEST: Recommended conditions and the latest staff report. Are there any further discussion. Will you call the roll Mr. Wandry. Commissioner Davis Yes Commissioner Feliz Yes Commissioner Acconero Yes Commissioner Aiello Yes Commissioner Nimr No Commissioner Whitney No Chair Best Yes CHAIR BEST: It was been decided that has been approved and per a recommendation that it will go on to the Board of Supervisors. LV/AA 7/22/87 P� k PUBLIC WORKS DEPARTMENT CONTRA COSTA COUNTY DATE: February 1988 TO: Board of Supervisors FROM: J. Michael Walford, Public Works Director SUBJECT: Deadhorse Ranch, Subdivision No. 6443 At 2 : 00 p.m. on February 2 , 1988 , you will be conducting a hearing on the referral from the Planning Commission regarding the Deadhorse Subdivision in Alhambra Valley. The Planning Commission approved a modification of condition No. 24-L to provide rock slope protection in the natural creek in lieu of a drop structure. Subsequent meetings with the developer and adjacent residents has surfaced confusion, with regard to future maintenance responsibility for the creek and bridge. We recommend the following be included as a part of your approval of this item: "All property owners using the bridge shall bear a prorate share of the maintenance costs for the bridge, the creek improvements located within the access road right of way, the retaining wall system at the northwest corner of the bridge approach which is located partially outside of the access road right of way, and repairs to the adjoining slope of said retaining wall -system that might be necessary for wall stability." The contractor' s work on the subdivision improvements has been poor at best. To insure that the creek work is done correctly and in a timely fashion we recommend that your approval include the following additional item: "The construction of the creek improvements shall be performed under continual inspection by the - developer's engineer. Upon completion of the work, the engineer shall certify, in writing, that the work was performed according to the approved plans." MFK:md dhrnh. t2 cc: County Administrator - -- County Counsel f'Y�.� Community Development Dir. FEB 1988 f ili;Vr.i.'�:iti G':;V6(-,p5 CUN;RA C-$IA rQ �. _ �.