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HomeMy WebLinkAboutMINUTES - 11081994 - 2.8 TO: BOARD OF SUPERVISORS, AS THE GOVERNING BODY OF CONTRA COSTA COUNTY FLOOD CONTROL AND WATER CONSERVATION DISTRICT FROM: J. MICHAEL WALFORD, CHIEF ENGINEER DATE: November 8, 1994 SUBJECT: REQUEST FOR DISTRICT SUPPORT OF ENVIRONMENTAL PROTECTION AGENCY GRANT APPLICATION FOR MODIFICATION OF SAN PABLO CREEK CHUTE UPSTREAM OF THIRD STREET, North Richmond Area SPECIFIC REQUEST(S)OR RECOMMENDATION(S)&BACKGROUND AND JUSTIFICATION I. Recommended Action,: Alternate A: DENY request by the Coalition to..Restore Urban Waters to support their Environmental Protection Agency grant application to modify the San Pablo Creek channel chute upstream of Third Street in North Richmond; or Alternate B: APPROVE the request by Coalition to Restore Urban Waters and AUTHORIZE the Chief Engineer to send letters to the Corps of Engineers and Environmental Protection Agency indicating the District's support for the-proposed modification of the existing concreted rock chute on San Pablo Creek upstream of Third Street subject to the following: 1. The District reserves the right to reject the proposal after the design and hydraulic calculations for the new chute have been submitted for review; 2. The District's financial participation shall be restricted to the cost of one meeting at the commencement of the design process and two reviews of the completed proposal; and 3. The Federal Environmental Protection Agency, or the Corps of Engineers, shall accept future maintenance and responsibility for the completed facility. i y Continued on Attachment: X SIGNATURE: RECOMMENDATION OF COUNTY ADMINISTRATOR RECOMMENDATION OF BOARD COMMITTEE APPROVE' OTHER SIGNATURE(S): , ACTION OF BOARD ON Nov. 8 1994APPROVEDAS RECOMMENDED OTHER ' The Board APPROVED Alternate B above, indicating the District's support for the proposed modification of the existing concreted rock chute on San Pablo Creek subject to the conditions as stated and Congressional acceptance of the structure. Ann Riley, 1250 Addison Street, Space #107, Berkeley, representing the Coalition to Restore Urban Waters, appeared and presented their position with respect to the project and urged that the County send a letter of support for this project to the Project Administrator for the Army Corps of Engineers before her.organizatior� signs a contract agreement with the Enviro ental Protection Agency. V TE OF SUPERVISORS UNANIMOUS(ABSENT AYES: NOES: - - =— =--- -- ---- - -_--- --- - - ABSENT: ABSTAIN: 1 hereby certify that this is a true and correct cNthe y of MFK:Iv:drg ; an action taken and entered on the minutes Board of Supervisors on the gate shown: g\admin\milt\bo3.t11 ATTESTED: 9 q PHIL BATCHELOR,Clerk of the Board Orig.Div: Public Works(FC) of Supervisors and County Administrator Contact: Milton Kubicek(510)313-2203 cc: County Administrator By .Deputy County Auditor County Counsel PW-Accounting PW-Flood Control t t San Pablo Creek - Chute November 8, 1994 Page Two II. Financial Impact: The sponsor, Coalition to::Restore Urban Waters, through a Federal.Environmental Protection Agency grant, will fund all costsJor design and construction. Flood Control District costs will be limited to reviewing the completed plans and specifications for the project at an estimated cost to the District of $5,000. Due to the hydraulic uncertainty and the unknown structural integrity of the proposed natural rock chute, and:the District's limited funding for this creek, it is imperative that the federal government accept maintenance and legal responsibility for the completed structure. III BACKGROUND FOR RECOMMENDATION The existing grade.control structure on San Pablo Creek upstream of Third Street consists of a rock and concrete grout chute approximately 3 feet thick and accommodates a flow line grade differential of approximately 3.5 feet. The Coalition to Restore Urban Waters proposes to replace the chute with another chute using large boulders to avoid the use of concrete to hold the rock in place. Our concern with the proposal is the uncertainty of designing a natural appearing rock chute in a major stream that could cause significant damage to adjacent properties if the facility fails. The natural environment for this type of chute is a mountain stream where erosion goes unchecked and the movement of some boulders are of no consequence because the adjacent ground is composed of boulders that slow down the rate of erosion. San Pablo Creek is designed to convey 5,000 cubic feet per second, i.e., 2,250,000 gallons per minute, during a 100-year storm event. This amount of flow can cause serious damage if the grade control structure fails. Like the County, the District is self insured. Significant project changes were made to the Wildcat-San Pablo Creek Project to accommo- date the desires of various environmental groups and agencies. These changes occurred after we had secured the .local funding for the project. The changes increased the local governments cost share by approximately$2,000,000. As of this date, the Project is still under funded by$800,000. We have secured redevelopment funding for one-half of this amount and it appears the District,will have to use its annual engineering budget to fund the remaining short fall. The two entities funding the project (Flood Control.Zone 7 and Drainage Area 73) are broke. Currently, 'the cost of maintaining the San Pablo Creek improvements is being funded by the Flood Control District's engineering budget.. A M _ ,J n .•, r At, .. ,, �11 . t V . . •i` • I .. . . ,,.. % . y - ,._ * �Y-:­�Y , - ...., , I .. -_� F.,F2�..- 7D 1 .� .. t. . . . . . . - «, 1 . .0A, _L. -.`.1 .� IC I - ,Ixi U-.W�, ,. I.. f,,� �-I , .­ - .�:. 1 .1 . 11 _ ..­ , . .. . . . ...S- � � -I I . . ! ; ­ ,: ..::. ­_. ­_!-.;_ � ... . . '­.-I '' I .­�...- . .. . . ' ... . �. ....,.-.... . .". �..� .. .... ....' ', ., .,, .. , � ....,.'�.,.. .; ., . �.I...). � .�:�� , ,� -,. ;. .� . 1 ­ , ­­ ­ . . 11. . ... 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Ohns.o John J r�.. _�., . . , . . - ., : - , . . .- _ , . � .. ..., . _. . -��or�:tr:,�costa�o�niI. 11'''.. ". . � , Contra. Cos ta: Count P .. ub'I�c . . . - .. Q o t� �t�it�, .:.. , I I .., , ­_ :_'.. '.1 . •_ ,. a tment. �► I .. .. . . " 1. �. ' '.. � . it _.'.,Works De r. n .7, . PI— F , . Y . . t-r� n w � C.�� �_ ' . G , . cie�r�.Drive .1; , . . . 2.55 .Gla I - - I ,. , .. - ,,., r , . - ,,,. 1. } ' :. `. 53 . . . 1 . -. Martinez CA 9 - . . . . .. . . , . , _ . r . 1. 1. . , :,. - - . , . a �•ohn 11 . e r . , , . . . . . ,. . . _ . . .. . . . ...• . " . _ -, . , - ,: . I I • 1. :' t�Te :h:ave. received �oad news.: from.:1.the En s.ronmental:,:,Pra 1.ec .1 . Agency hat " , ... the. will ..fund-=..the' r_edes i n :and repla+cement;.:.a.f the :.grade cont'ol;.a fracture . . y- = . - y . 1. .., u streaea of:<a 3rd st:ree;t br'- "e -on San Pablo Creek.:.: `-Thi. ' . has been .a.�..pro�ec�t P gI,10 we have co,ordinaaed thr�o.0 h:.the i�ldcat--San`".P._ab o;:.free s Des l.gn_Team minutes . _ _. .'; _ . . . S rin 19,3 and:, 1994 The Sacramento►::Di trct` ©:f. the :Arm Corgis of _.En lnees P _ . g: has 'asked.us`to .re uest':.tha.t ou 'formall a rove the,- concept.of this pro; ect �n..�1. -11 , . - q 3� Y.1.1.PP % . ,, . ..a.lett-er to:'xahers: ,:-Zo that. the can. r'oceed: o:fwor_k.with:a ;ot. au,ar�d u when the ! y P - . ' :.., 1. . g rant. funds r:,b"ecome available .,ln.earl •.1995 .Tpan.:award ;o`f the: grant:we:�w�ll: cork , -_ - - ,... :.. t roduc .,." _ with ,a roP:r late: counter',:s to f f..and Armyo`r s staff: a design.:the prod.ec P.. e PP . , .t : -A""�-j�]^��{'�n. docum6Ats;'a:ndt acquire ,necessar�T vA.er�aaits:- _rom cox�nty., state. and federal . . Y mow/ .. .. r. ',, : .. . . es- _ - . . a encs , . . .. g ... .- .. - 1. . .. . . _ I 'll .- _ - 1. -- - . .,•r On�:July 14- :Paula<.Bowers" and �Ma.rk Boedtker:.accomr anie.d"l.ar� F�shbain Beth . P . . " .. - ,. . . Stone. .and_,:T , se,If on : a field ::tri -: to: .:Tawe;:r" Wi.ld+cat and `:'Sari: Pablo: .c:z"eeks. as: V( .. - . - . arra1 .n ed..a I.alie . ne 2 Design`Team meeting to determine,,,whA_, storI 1-at.�on:.pro3 ec1. ts were cornpatble wit current. Arm ors ro ect ac% tivities on t e two tree s "The f geld;a`rl.p.re ulted �.n:some rede's lgn: o the 1 cat. Cr'ee, is -adder�-a ove ... . _ 1. . . ' the:sed me ri .bas•in .to.,' et-ter align �t with..the-.low, -f1'ow'.cha' : along the, lout� 11i . . . . . 11 .bank: .: :•The ',des -gn,.op loris ,for .�'m ronin ,. _fish : assa a under J tlie= railroad tracks P1. • ' - . P. 1. . ;. on_W1.ldcat .0:reed were. determined to be n�i ilma1 because o'. ..t e constraints:`o t e , . . . . _ . site : : _ , .. 1 . . . 4. . . . . , T'he :Army` Corps : staff :felt that the grade..control.. structure on San `Pablo . ' Creek could' be reconstructed r with greater sensitivity,',.to.-. the. environment: And - _ aestheaa_cs.;" T1e saaf f approved for ur oses o f subm,ittin the rant ro osal• to - - . . P P g g: P P . . . .. . E P.A _,,the concept of, removing the groutin lacing: rock boulders as rade . .g.. - P g g : cont1 . rol stru.ctu.res and replanting south bank vegetation::`:Th-e:pr�i j ect design will . . - be modeled �a:fte.r a_similar project completed-�o.n: upper Wildcat Creek-last fall in: .. ,, . . - . . - which .concrete weirs we're replaced with l:arge..boulders. ar,rang'ed to -contro:l-the . • - . . . 1. . - 1. _ . 1. .' r 1. 1 . 1. 1- 1 , . . - . .REGIONAL CONTACTS i.Northeast: River Watch:Network, 153 State-St,.,..M1.ontp;eiier,`, 05602 �802� 223=3840+�Ce1.iitra6.East Coast. ' � 'Save our Sf�reams,`(zaak Walton League;_-'#401 Wilson.'Boulevard:, l�evel..B•, Arlin-gton,�' 22209,(703} 528-1818 ,Southeast: Minority: _ .� _ r - E�nvironmen-tal Association,:.P 0.,Box 1607,,D`ecatur,GA 30030(404)373-4771 !_Central U.S. Friends of the Chicago,River,_407.S.Dearborn . Ave.,,Ste. 1580,''Chicago;l 60605,-(3;12)939-0490 and Minority Environmental-Association,3509 Milar Rd.,.Sandusky,.QH 448.10(419)625-3230 , .Northwest:Urban Strea'ms.Council; 7:2'9 S.E: 33rd St_:_,.P:ortland--013.972`19 (503)`239 406`5 4. Sou hirvest:,:Golden.State Wildlife -•. 'Federation and Urba-�.Creeks Council; 125.0:Addison St.,#107,Berkeley,CA 947.02,(5'i0..8.4. ..... :. ;'. . .. . . . .Page.. 2 gradient -t_hrough a step-pool formation-: Enclosed,are. copies of before and after photos of this project and either the-.Army Corps staff. or we can provide you with :a report; describing this project if-.you-are interested. -We.:�8ubmit.ted'tY e grant application to EPA, based on the; concurrence of the..... genc-es present at the Design Team for pursuing the. San Pablo Creek project. 1n.the ..winter. of.`19.9.5 1we will contract. with a hydraulic engineer to work with the county:and: Corps to. design the.:new -structure *and attain permits This engineer w.ill..:-also 'supervise construction and restoration;,activities At this time we need.:to request .a etter o support for this p-ro�ect from.Contra Costa County to ,t Paul`. Bowers pro j ect .adminis trator for the Army Corps before our organization ;signs a.,contract agreement with the EnVironmenta1 Protection Agency. Please mail ...us.a.,:copy-.;,of' this letter so that -it can be made .part of the record for E.P.A. We would like to str_pss test th? _ t,rant c.o e�.s the desigin permitting, materials-=and construction of the project We only ask that the county approve the concept .and review the design drawings -as its contribution. Please- call -me ..,.:.you need- additional. information -at- (510) =848 2211: We are now working under. the '.,organizational name of the Coalition to Restore-.Urban- Waters instead of the Golden :.State Wildlife ,Federation. . Sincere. :. Ann Ril cc:. Paul Bowers, U :S Arrny Corps of Engineers Enveonmental Protection Agency : I�ynelle Johnson, Congressman George Miller California Department of: 'Fish and Game F t I Al �' .f r, n-:;*��ta. k.�n� � �. �y, ,I� f�, ; L: 1 �•y �,tf�ti�ri�yl[y •,�,: { ♦.} � rte,°�. 'rte �'��*; � t .1 - - ,w :Hd 40 AAW ,5� fix,,. ;`}Y .,S, �nw-�}LX �;�. �:�+��_ `[`�'`-•(,-T�- -..sf�i�._ { ��..�. �s� �f'tr• �'""..i s s� �'.'�+r,:t ♦ • .i C.• s }�� yr- �"'� -`--�'( w-a.� s�u S�,,,�*F,�', �'•�,. �,J fry N'��y '.j,�4'� :' _• - i5t. x,` r�§x�.-•e.; Sgt ` _ �-8 .�� ,'i/ }�- � {z,4 � `„h "� i•,' �`�,��ax • _ r4:". Vq R: .� 's: ` �'".. 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