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HomeMy WebLinkAboutMINUTES - 08031993 - IO.3 D' t I .O. -3 = � Contra TO: BOARD OF SUPERVISORS Costa FROM: Internal Operations Committee County DATE: July 26 , 1993 . SUBJECT: LARGE LOT REZONING SPECIFIC REQUEST(S) OR RECOMMENDATIONS) & BACKGROUND AND JUSTIFICATION RECOMMENDATIONS Inform the Board of the large lot rezoning options presented by the Director of Community Development so that Board members can advise the Committee of their thoughts on this measure. Hold the issue in I.O. for action on September 27 , 1993 . FISCAL IMPACT Will vary depending on direction given to staff. BACKGROUND/REASONS FOR RECOMMENDATIONS On July 20, 1993,; the Director of Community Development forwarded a report to I.O. on options for large lot rezoning actions (copy attached) . The Committee discussed this item but decided to forward the report to the Board for information and to reconsider the item at the September 27 , 1993 I.O. meeting. Any feedback to I.O. committee members would be appreciated. The Briones Hills,Agricultural Preservation Agreement was discussed where 5-acre zoning was committed to by Supervisor Fanden and if this was going to be reconsidered that those participants need to be notified. The issue of insuring assignment of one staff to do all these actions was discussed so that staff continuity on these various zoning approaches might yield cost savings: CONTINUED ON ATTACHMENT: YES SIGNATURE RECOMMENDATION OF COUNTY ADMINISTRATOR RECOMMENDATION OF ?ARD COMMITTEE APPROVE OTHER SIGNATURE(S) : SUNNE WRIGHT McPEAK E SMITH ACTION OF BOARD ON Allgllst 3, 1993 APPROVED AS RECOMMENDED OTHER The Board APPROVED 'the above recommendation and requested that Community Development Department to send copies of this report to all the cities in Contra Costa, the Citizens Land Alliance, East County Board of Realtors, Contra Costa Board of Realtors, Building Industries' Association, the Sierra Club, Mt. Diablo Audoban, Cattlemen's Association, the Farm Bureau and other environmental groups. VOTE OF SUPERVISORS I HEREBY CERTIFY THAT THIS IS A UNANIMOUS (ABSENT 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. Orig: Jim Cutler (646-2035) ATTESTED 3 /9 r1 3 cc: Community Development Department PHIL BATCHELOR, CLERK OF CAO THE BOARD OF SUPERVISORS County Counsel AND COUNTY ADMINISTRATOR Public Works BY , DEPUTY MsIdArgelot.bo CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMENT DATE: July 20, 1993 TO: Internal'Operations C m ee FROM: Harvey E. Bragdo , t unity Development SUBJECT: LARGE LOT LTU LANDS REZONING RECOMMENDATIONS Provide direction on whether the Board wishes staff to proceed with additional large lot rezoning efforts. Costs would be $5,000 to $10,000, depending on what effort is needed. FISCAL IMPACT Staff time to do the studies and publication and notification costs to bring the rezoning efforts to hearing. BACKGROUND/REASONS FOR RECOMMENDATIONS On June 22, 1993, the Board acted on the Internal Operations Committee (IOC) report of June 14, 1993 which acknowledged the A-40 Ag Core rezoning effort in process, the Agricultural Task Force work program, requested the Community Development Department to rezone major publicly owned lands as staff time became available, and determined the County Planning Commission should be the hearing body for rezoning actions which flow from the Countywide review of open space zoning practices. The IOC continued the discussion on subject of possible other rezoning actions which the Board of Supervisors may wish to initiate until additional studies are completed. As part of considering current and possible future rezoning actions,the Board directed staff to study subdivision and rezoning activities outside the Urban Limit Line (ULL), since January 1991 when the new County General Plan was adopted. • Approved Subdivision Activity Staff has compiled a list of approved subdivisions in areas which are designated for agricultural;use. Since January 29, 1991, 39 subdivision applications have received approval. Table 1 shows the "Subdivision Approved in Agricultural Designations Since Adoption of the County General Plan." These applications will relate to a, display graphic which will be available at the IOC meeting. It shows the distribution of subdivisions across the County both inside and outside of the ULL. Significantly, it includes major subdivisions,of agricultural Internal Operations Co. nittee Date: July 20, 1993 Large Lot Rezoning -2- lands, which include from five to nine lots. A total of 39 subdivision applications received approval. These applications affected over 2,500 acres and resulted in 139 parcels. Of this total, minor subdivision activity affected nearly 90% (2,285 acres) of the acreage and created over 70% (102 parcels) of all lots. Two hundred sixty-two (262) acres were affected through major subdivision activity and created 37 lots. As Table 1 indicates, many of the subdivisions yield acreage of less than one unit/ten acres, especially within East County where most of the remaining active farmingi land exists. • Pending Applications A survey of pending subdivision applications. reveal that 29 applications are being processed in areas designated for agricultural use. Subdivision applications which have pending general plan amendments were not included, since the requested land use changes would result in urban densities. Subdivision applications which are located in the Bethel Island - Off Island Bonus Area were also not included in this list because a bonus density — allowing urban densities — has been or may be awarded in these cases. Of the 29 pending subdivisions, 27 represent minor subdivisions and affect a total of 2,043 acres. These subdivisions, if approved, could result in a total of 88 parcels. Two major subdivisions affect 1,094 acres and would result in 124 total lots. The total acreage affected by all pending subdivision applications is 3,137 acres and could result up to 212 total lots. • Large Lot Rezoning The issue before the IOC and ambiguity to staff is that the Board on differing occasions gave different direction to staff on moving ahead with large lot rezoning efforts for the agricultural areas of the County. Rezoning efforts within the Agricultural Core are pending before the County Planning Commission and will be further discussed as a separate issue before IOC at a later date. The direction to initiate rezoning of major publicly held land to A-80 was authorized based on the June 16, 1993 IOC report and was accepted by the Board on June 22, 1993. The Board needs to give further direction to staff on what additional actions it Internal Operations Co. ,nittee Date: July 20, 1993 Large Lot Rezoning -3- wishes staff to Initiate on this subject. The alternatives range from a Countywide rezoning of the remaining agriculturally designated lands (Agricultural Lands, Delta Recreation and Resources categories),to breaking the issue into smaller parts or areas of the County. For example, the Board could direct staff to consider rezoning: ■ The Delta Recreation and Resources area lands which are within the Federal Emergency Management Agency designated 100-year flood plain. These areas are susceptible to flooding due to levee failure and includes only "island" areas as defined by the General Plan Congress (other mainland areas have similar flood hazards but are designated as Agricultural Lands). The General Plan requires a minimum 20 lot size.- our ize;our staff, recommendation urges up to 80-acre minimum depending on the existing parcel sizes. ■ The Board has established a firm policy of not granting exceptions to the collect and convey ordinance. This is discussed in the attached memorandum from Mitch Avalon of the Public Works Department. Rezoning to 10-acre minimum parcel size or larger would resolve this issue for areas located east of Marsh.Creek or in the Byron area. ■ Lands within the ULL designated as Agricultural Lands. These lands could be protected from pre-mature ranchette subdivisions in order to prevent;fragmentation that would preclude orderly urban development at some future time. These areas could be rezoned to very large sizes --•20 to 80 acres -- to preserve the future long range planning options. ■ Separate rezoning efforts could be considered on an area by area basis and have an individualized review of the appropriate agricultural zoning done 'for each (e.g., the Morgan Territory area of southeast County, etc.). ■ Conformity with General Plan policies of adjacent cities is another choice. Clayton, for example, has urged a 20-acre minimum for agricultural lands east of the city within their planning area. Staff needs clear direction from the Board on which of these options, if any, that the they wish staff to pursue over the next year. JWC:gms nw1 U.rgLotRZ Jwc Table 1 - Subdivisions Approve,-.a Agrticultural Areas since 1/29x91 A B C D E F G H JI »otle'> ::::X.: :�1.....:.:...::...:...:..................::.::::::::::::::::::.::.;: 3:>E1'::':Epd.t1 2 .::::::.:. if.::.:.:::,::::.::,.:::i,1Fhi,....::..::.:::.,,.,,:::Arse:..:,.......................... .........................,.:..::.:...... ...... .:............................ .......... 3 4 MS900076 267110005 ORNDA 113 14 28.25 A2 JAL YES 5 MS900079 007090033 BRTWD 16 13 5.33 A2 JAL YES 6 MS900080 007090032 BRTWD 15 3 5.00 A2 AL YES 7 MS900084 365040003 MRTNZ 165 3 55.00 A4 AL YES 8 MS900095 362140012 MRTNZ 102 3 34.00 A2 AL YES 9 MS900114 208210004 SNRMN 52 2 26.00 A4 AL YES 10 MS900122 007020013 BRTWD 221 4 55.25 A2 AL YES 11 MS900145 362110004 MRTNZ 162 4 40.50 A2 AL YES 12 MS900148 011150003 BYRON 50 4 12.50 A3 AC YES 13 MS900149 015040013 BRTWD 67 4 16.75 A3 AC YES 14 MS900151 080160016 CLYTN 15 3 5.00 A2 AL YES 15 MS900152 368010024 MRTNZ 16 3 5.33 A2 AL YES 16 MS900159 032290001 OKLY 11 2 5.50 A2 AL NO 17 MS900160 7090022 BRTWD 25 4 6.25 A2 AL NO 18 MS900164 020200029 OKLY 24 3 18.00 A2 AL YES 19 MS900165 020200030 OKLY 13 2 6.50 A2 AL YES 20 MS900166 020200027 OKLY 16 3 5.33 A2 AL YES 21 MS900167 020200028 OKLY 17 3 5.67 A2 AL YES 22 MS900170 015110018 KNTSN 10 2 5.00 A2 AL YES 23 MS900172 015110008 KNTSN 10 2 5.00 A3 AL YES 24 MS900175 2040047 BYRON 38 3 12.67 A2 AL YES 25 MS900180 362180001 MRTNZ 75 4 18.75 A2 AL YES 26 MS900182 007020024 BRTW 15 3 5.00 A2 AL YES 27 MS900190 020030005 KNTSN 11 2 5.50 A2 AL YES 28 MS900191 006150003 LIVAL 322 4 80.50 A80 AL YES 29 MS910003 011041001 BYRON 60 2 30.00 A3 AC YES 30 MS910006 006140008 LIVAL 153 2 76.50 A80 AL YES 31 MS910008 007140014 BRTWD 45 2 22.50 A4 AL YES 32 MS910009 201090040 KNTSN 53 4 13.25 A3 AL YES 33 MS910018 365030068 MRTNZ 268 2 134.00 A2 AL YES 34 MS910023 078140021 CLYTN 43 4 10.75 A2 AL YES 35 MS910033 002020003 BYRON 40 3 13.33 A3 AL YES 36 MS910044 033130057 OKLY 11 2 5.50 A2 AL NO 37 MS900157 078320001 CLYTN 32 4 8.00 A2 AL YES 36 Minor Sub Totals 2286 102 39 40 S1391 7641 015090001 KNTSN 92 9 A3 AL YES 41 SD907529 365030076 MRTNZ 63 6 A2 AL YES 42 SD907591 020140004 KNTSN 20 5 A3 AC YES 43 SD907595 011180051 BYRON 47 9 A2 AC YES 44 SD907615 007030050 JBRTWD 40 8 A2 AL YES 45 Major Sub Totals 262 37 46 ITOTALS 2548 139 47 Source: Contra Costa County Table 2-Pending Subdivisions In....,ricuttural Areas A B c D E F G H 1 1 A:.. :Aetbsf:::.::::........:...:.:.::.::::::::::.::,:::::::::::::...:::::::::.;;: :......:....::.>:.>;;;:.>•.;;:.;:.;:.;;:.;;;:.;:.;:.;:.;:;.:;»:.;;:<.>:.;;;;;;::.:.::.;;;:.;;:.;:.;:.z;::;:.<::::z:a:>::>:>;::;::><>:<:>'::i»:<::::;>r>�«.:»::;:i:;`::::>.:»::>r:;.;: ..... ::.: <>::>::>r :.;::.::«:.: . :;::<::>::>::>::::> trill ::>::>:iz pd. .........ULL?...... Vi : : .....Acxe.........:::::: :Cels:.::,.:::.:: ot.::.:::::.:..��........ ................................................. 3 MS890036 078070025 CLYTN 23.20 4 5.80 A2 AL 4 MS900141 199030040 SANRM 12.30 3 4.10 A4 AL 5 MS900169 209060001 SNRMN 15.00 3 5.00 A2 AL 6 MS900176 362150017 MRTNZ 104.70 4 26.18 A2 AL 7 MS900178 258060014 MRGA 27.00 4 6.75 A2 AL 8 MS900179 258050001 MRGA 40.001 4 10.00 A2 AL 9 MS900185 258020018 MRGA 52.36 4 13.09 A2 AL 10 MS900195 362140007 MRTNZ 7.80 4 1.95 A4 AL 11 MS900198 365370007 MRTNZ 13.70 2 6.85 A2 AL 12 MS900199 365370003 MRTNZ 28.26 4 7.07 A2 AL 13 MS910007 362130013 MRTNZ 43.46 2 21.73 A2 AL 14 MS910029 002020010 BYTON 15.97 3 5.32 A2 AL 15 MS910030 078280002 CLYTN 333.55 4 83.39 A4 AL 16 MS910040 365410004 MRTNZ 15.01 3 5.00 A2 AL 17 MS910055 078340001 CLYTN 20.00 4 5.00 A2 AL 18 MS920004 015110024 KNTSN 12.00 2 6.00 A3 AL 19 MS920010 075051004 ANT 200.00 4 50.00 A4 AL 20 MS920011 118050003 CONCD 15.93 2 7.97 A2 AL 21 MS920015 027020025 BTHIS 40.00 4 10.00 A3 DR 22 MS920019 011070011 BYRON 84.60 2 42.30 A4 AC 23 MS920021 002130010 BYRON 22.301 2 11.15 A2 AL 24 MS920024 080040034 CLYTN 20.00 2 10.00 A2 AL 25 MS920025 078140020 CLYTN 41.70 4 10.43 A2 AL 26 MS930003 080150010 CLYTN 19.00 2 9.50 A2 AL 27 MS930004 023070009 KNTSN 556.00 4 139.00 A3 DR 28 MS930006 365030068 MRTNZ 238.00 4 59.50 A2 AL 29 MS930009 365050002 MRTNZ 41.00 4 10.25 A4 AL 30 Minor Sub Totals 2,043 Be 31 32 33 SD887175 099160017 CNCR 64.00 9 7.11 P1 AL 34 SD907584 078040002 CLYTN 1030.00 115 8.96 A2 AL 35 Major Sub Totals 1,094 124 36 37 Totals for All Subdivisions 3,137 212 38 1 PUBLIC WORKS DEPARTWENT G Attach int. CONTRA COSTA COUNTY ~ `%"/' 1n DATE:~'May,10, 1993 L Cpl. TO: Cutler, Chief Advanced Planning, Community Development FROM: tcb , AvalonSenior Civil Engineer, Engineering Services Division SUBJECT: Correct and Convey in East County In 1983, the Board established a firm policy for not granting exceptions to the collect and convey provisions of the Ordinance Code. At about the same time, staff determined that parcel sizesof 10.acres or greater that are located east of Marsh Geek or in the Byron area, could be developed,as their incremental increase in impervious surface areas would be insignificant in the overall watershed. However, development of parcel sizes of less than 10 acres in size was determined to have a significant cumulative impact on the watershed. In the far east County many of the natural watercourses have been altered by man many years ago and relocated along property lines to facilitate agricultural activities. Many of these man made ditches are still;called creeks, but are inadequate man made facilities nonetheless. Examples of these are Kellogg Creek and Frisk Creek. The result is that much of East County cannot satisfy the collect and convey drainage requirements and cannot, therefore, develop below 10 acre size parcels. Unfortunately many parts of East County are zoned agricultural and may, under certain agricultural zoning districts.,develop down to 5 acre parcel sizes. We have encountered problems in the past where minor subdivisions have been processed for parcel sizes of less than 10 acres in size. :The applicants argue that the zoning allows them to subdivide to S acre parcels and for some reason they were not told of the tremendous cost involved to satisfy collect and convey. If the zoning were changed to 10 acre or larger parcel sizes in these areas, this problem would not surface and the public would be better served until the drainage infrastructure is in place. RMAd craxer w .cc: B. Murphy, Englonring Services P. Harrington, Flood Control S Wrigh4 Engineering Services i 5 I.0. - �/�" G�1 3 —C � - - _contra TO: BOARD OF SUPERVISORS _ ^ .� Costa FROM: Internal Operations Committee County DATE: July 26 , 1993 SUBJECT: LARGE LOT REZONING SPECIFIC REQUEST(S) OR RECOMMENDATIONS) & BACKGROUND AND JUSTIFICATION RECOMMENDATIONS Inform the Board of the large-1 rezoning options presented by the Director of Community Deve+lopmen so that Board members can advise the Committee of their thoughts on: this measure. Hold the issue in I.O. for action on SeptembLk. 27-; 1 93 . FISCAL IMPACT Will vary depending on direction given to staff. BACKGROUND/REASONS FOR RECOMMENDATIONS On July 20, 1993, the Director of Community Development forwarded a report to I.O. on options for large lot rezoning actions (copy attached) . The ' Committee discussed this item but decided to forward the report to the Board for information and to reconsider the item at the September 27, 1993 I.O. meeting. Any feedback to I.O. committee members would be appreciated. The Briones Hills Agricultural Preservation Agreement was discussed where 5-acre zoning was committed to by Supervisor Fanden and if this was going to be reconsidered that those participants need to be notified. The issue of insuring assignment of one staff to do all these actions was discussed so that staff continuity on these various zoning approaches might yield cost savings'. CONTINUED ON ATTACHMENT: YES SIGNATURE RECOMMENDATION OF COUNTY ADMINISTRATOR RECOMMENDATION OF BOARD COMMITTEE APPROVE OTHER SIGNATURE(S) : SUNNE WRIGHT McPEAK JEFF SMITH ACTION OF BOARD ON AuguGt 3, 1993 APPROVED AS RECOMMENDED OTHER VOTE OF SUPERVISORS I HEREBY CERTIFY. THAT THIS IS A UNANIMOUS (ABSENT 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. Orig: Jim Cutler (646-2035) ATTESTED v Cc: Community Development Department PHIL BATCHELOR, CLERK OF CAO THE BOARD OF SUPERVISORS County Counsel AND COUNTY ADMINISTRATOR Public Works BY , DEPUTY Ms11Large1ot.bo CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMENT DATE: July 20, 1993 TO: Internal Operations C m ee FROM: Harvey E. Bragdo t unity Development SUBJECT: LARGE LOT LTU LANDS REZONING RECOMMENDATIONS Provide direction on whether the Board wishes staff to proceed with additional large lot rezoning efforts. Costs would be $5,000 to $10,000, depending on what effort is needed. FISCAL IMPACT Staff time to do the studies and publication and notification costs to bring the rezoning efforts to hearing. BACKGROUND/REASONS FOR RECOMMENDATIONS On June 22, 1993,,the Board acted on the Internal Operations Committee (IOC) report of June 14, 1993 which acknowledged the A-40 Ag Core rezoning effort in process, the Agricultural Task Force work program, requested the Community Development Department to rezone major publicly owned lands as staff time became available, and determined the County Planning Commission should be the hearing body for rezoning actions which flow from the Countywide review of open space zoning practices. The IOC continued'the discussion on subject of possible other rezoning actions which the Board of Supervisors may wish to initiate until additional studies are completed. As part of considering current and possible future rezoning actions, the Board directed staff to study subdivision and rezoning activities outside the Urban Limit Line (ULL), since January 1991 when the new County General Plan was adopted. • Approved Subdivision Activity Staff has compiled a list of approved subdivisions in areas which are designated for agricultural use. Since January 29, 1991, 39 subdivision applications have received approval. Table 1 shows the "Subdivision Approved in Agricultural Designations Since Adoption of the County General Plan." These applications will relate to, a display graphic which will be available at the IOC meeting. It shows the distribution of subdivisions across the County both inside and outside of the ULL. Significantly, it includes major subdivisions of agricultural Table 1- Subdivisions ApproveL..a Agrticultural Areas since 1/29191 • A B; C D E F G H 1 wattle ::sssSnl »I<: ` : : « <> ..X . <jL > 3 4 MS900076 267110005 ORNDA 113 4 28.25 A2 AL YES b 1 MS900079 007090033 BRTWD 16 3 5.33 A2 AL YES 6 MS900080 007090032 BRTWD 15 3 5.00 A2 AL YES 7 MS900084 365040003 MRTNZ 165 3 55.00 A4 AL YES 8 MS900095 362140012 MRTNZ 102 3 34.00 A2 AL YES 9 MS900114 208210004 SNRMN 52 2 26.00 A4 AL YES 10 MS900122 007020013 BRTWD 221 4 55.25 A2 AL YES 11 MS900145 362110004 MRTNZ 162 4 40.50 A2 AL YES 12 MS900148 011150003 BYRON 50 4 12.50 A3 AC YES 13 MS900149 015040013 BRTWD 67 4 16.75 A3 AC YES 141 MS900151 080160016 CLYTN 15 3 5.00 A2 AL YES 15 MS900152 368010024 MRTNZ 16 3 5.33 A2 AL YES 16 MS900159 032290001 OKLY 11 2 5.50 A2 AL NO 17 MS900160 7090022 BRTWD 25 4 6.25 A2 AL NO 18 MS900164 020200029 OKLY 24 3 8.00 A2 AL YES 19 MS900165 020200030 OKLY 13 2 6.50 A2 AL YES 20 MS900166 020200027 OKLY 16 3 5.33 A2 AL YES 21 MS900167 020200028 OKLY 17 3 5.67 A2 AL YES 22 MS900170 015110018 KNTSN 10 2 5.00 A2 AL YES 23 MS900172 015110008 KNTSN 10 2 5.00 A3 AL YES 24 MS900175 2040047 ' BYRON 38 3 112.67 A2 AL IYES 25 MS900180 362180001 MRTNZ 75 4 18.75 A2 AL YES 26 MS900182 007020024 BRTW 15 3 5.00 A2 AL YES 27 MS900190 020030005 KNTSN 11 2 5.50 A2 AL YES 28 MS900191 006150003 LIVAL 322 4 80.50 A80 AL YES 29 MS910003 011041001 BYRON 60 2 30.00 A3 AC YES 30 MS910006 006140008 LIVAL 153 2 76.50 A80 AL YES 31 MS910008 007140014 BRTWD 45 2 22.50 A4 AL YES 32 MS910009 201090040 KNTSN 53 4 13.25 A3 AL YES 33 MS910018 365030068 MRTNZ 268 2 134.00 A2 AL YES 34 MS910023 078140021 CLYTN 43 4 10.75 A2 AL YES 351 MS910033 002020003 BYRON 40 3 13.33 A3 AL YES 361 MS910044 033130057 OKLY 11 2 5.50 A2 AL NO 37 1 MS900157 078320001 ICLYTN 32 4 8.00 A2 AL YES 38 Minor Sub Totals 2286 102 39 40 SD917641 015090001 KNTSN 92 9 1 A3 AL YES 41 SD907529 365030076 MRTNZ 63 6 A2 AL YES 42 SD907591 020140004 KNTSN 20 5 A3 AC YES 43 SD907595 011180051 BYRON 47 9 A2 AC YES 44 SD907615 007030050 IBRTWD 40 8 A2 AL YES 45 Major Sub Totals 262 37 46 ITOTALS 2548 139 47 Source: Contra Costa County Table 2-Pending Subdivisions in...-,,ricultural Areas A B c D E F G H 1 ' `, 1 ..:...... ............:::::: :::.::::::::::::. IWX 2 «»::::... . :1�::>:«>;>::;:<»:::;::;::APt�.::.::::.::::::::::l►fmt.:::::::::::::::::. ..................... 3 MS890036 078070025 CLYTN 23.20 41 5.80 A2 AL 4 MS900141 199030040 SANRM 12.30 3 4.10 A4 AL 5 MS900169 209060001 SNRMN 15.00 3 5.00 A2 AL 6 MS900176 362150017 MRTNZ 104.70 4 26.18 A2 AL 7 MS900178 258060014 MRGA 27.00 4 6.75 A2 AL 8 MS900179 258050001 MRGA 40.00 4 10.00 A2 AL 9 MS900185 258020018 MRGA 52.36 41 13.09 A2 AL 10 MS900195 362140007; MRTNZ 7.80 4 1.95 A4 AL 11 MS900198 365370007 MRTNZ 13.70 2 6.85 A2 AL 12 MS900199 365370003 MRTNZ 28.26 4 7.07 A2 AL 131 MS910007 362130013 MRTNZ 43.46 2 21.73 A2 AL 141 MS910029 002020010 BYTON 15.971 3 5.32 A2 AL 15 MS910030 078280002 CLYTN 333.55 41 83.39 A4 AL 16 MS910040 365410004 MRTNZ 15.01 3 5.00 A2 AL 171 MS910055 078340001 CLYTN 20.00 4 5.00 A2 AL 18 MS920004 015110024 KNTSN 12.00 2 6.00 A3 AL 19 MS920010 075051004 ANT 200.00 4 50.00 A4 AL 201 MS920011 118050003 CONCD 15.931 2 7.97 A2 AL 21 MS920015 027020025 BTHIS 40.001 4 10.00 A3 DR 22 MS920019 011070011' BYRON 84.601 2 42.30 A4 AC 23 MS920021 002130010 BYRON 22.30 2 11.15 A2 AL 24 MS920024 080040034 CLYTN 20.00 2 10.00 A2 AL 25 .MS920025 078140020 CLYTN 41.70 4 10.43 A2 AL 26 MS930003 080150010 CLYTN 19.00 2 9.50 A2 AL 27 MS930004 023070009 KNTSN 556.00 4 139.00 A3 DR 28 MS930006 365030068 1MRTNZ 238.001 4 59.50 A2 AL 29 MS930009 365050002 JMRTNZ 41.00 4 10.25 A4 AL 30 Minor Sub Totals 2,043 Be 31 32 33 1 SD887175 099160017, CNCR 64.00 9 7.11 P1 AL 341 SD907584 1078040002 CLYTN 1030.00 115 8.96 A2 AL 351 Ma'or Sub Totals 1,094 124 36 37 Totals for All;Subdivisions 3,137 212 38 PUBLIC WORKS DEPART .NT t.,�-R Attach ,�M'; CONTRA COSTA COUNTY DATE: Vay10, 1993 TO: Cutler, Chief Advanced Planning, Community Development FROM: tch Avalon, Senior Civil Engineer, Engineering Services Division SUBJECT: Collect and Convey in East County In 1983, the Board established a firm policy for not granting exceptions to the collect and convey provisions of the Ordinance Code. At about the same time, staff determined that parcel sizes of 10 acres or greater that are located east of Marsh Creek or in the Byron area, could be developed,as their incremental increase in impervious surface areas would be insignificant in the overall watershed. However, development of parcel sizes of less than 10 acres in size was determined to have a significant cumulative impact on the watershed. In the far east County many of the natural watercourses have been altered by man many years ago and relocated along property lines to facilitate agricultural activities. Many of these man made ditches are still called creeks, but are inadequate man made facilities ncmetheless. Examples of these are Kellogg Creek and Frisk Creek. The result is that much of East County cannot satisfy the collect and convey drainage requirements and cannot,therefore, develop below 10 acre size parcels. Unfortunately many parts -of East County are zoned agricultural and may, under certain agricultural zoning districts.,develop down to S acre parcel sizes. We have encountered problems in the past where minor subdivisions have been processed for parcel sizes of less than 10 acres in size. The applicants argue that the zoning allows them to subdivide to S acre parcels and for some reason they were not told of the tremendous cost involved to satisfy collect and;convey. If the zoning were changed to 10 acre or larger parcel sizes in these areas, this problem would not surface and the public would be better served until the drainage infrastructure is in place. RMAW CCutlert5 .Cc. B. Murphy, Engineering Services P. Harrington, Flood Con&W S. Wright Engineering Services