Agenda - 06-04-2002 - 9d - Laserfiche WebLink

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MEMOP-4 DLM 31 TO: Cmmty Commissioner COPIES: Iohnf im' ,County Manager FROM: Paul Thames,County Engine DATE: SeptemberU,2001 SUBJECT; Lake Orange,Ent River and Capacity Use Agrsment issues The following report is pmvidcd in response to a County Commiasionarequest for updated inforredon cause opaatun of the an Rive system end the modification ofdut operedon m light ofrhe compledon of Hillsborough's reservoir on the west fork ofthc Eno Riva. As the Hasid is aware,the Town-)can euseY W dhas been involved iarhe a EnO Rs(dasher,per firs land aoquisitio4 ctastuctiom em.)the I re develop its west fork oPthe Eat Riverraavo gallo Of number o when filled W uneleation o Peaselramou(impootMSL,ppmxi anaf2b one gallons Of water who fillMmanelevatm ofappcoximate]y 633.0 fezt MSC,surface area ot204 acne)woo ,aoMu lYcomplc l the fallllo0d. The Townbegan£thingtheokduuVa betty 200: e$era structure severalhan datms e r allowed Ovate been leak out of the reservoir through im SL,(oprelease of structure. As the datgthereswosshas beerftledm me3 millingaoI.O feetoxi"lp54 pare ly slzfeebelew thefult Ievepandimpound appmximamly evok(ntascbuj tog rcoeu, .for nepacer rfw) Phaze l eed to be. the net safe Yield per day. Phex lresecvou tent inclsWivgieheases for ivstream flow)u esrimatW m be I:8 million gallons pa day. In the permid ing process for the lulisbmough reservoir,sevend agencies(rhe Corps of En the amh and federal fish and wildlife agevciee,the NC Divuiov of Lend Resources(Derr Safety seodm) and the NC Divenoa.af Wsmr Itewmces)imposed a aumba ofconditoos or ,louemea,on the Town these requirements gmaelly involved evad atirg and mitigating the pomarsd and projeeed imps,,of • consonectivg a nowreservau/Dooding m existing strnm/river on upland nveine and wedaad biota 00enmuti og a new neservon/floOdivg a significant lead area an historical sites and ardfects • hrcamPtng enteral insteam flow pavans Uuougd mpouvdivg normal and smrm water flows ' eeedMg a hi¢ter Magnitude flood ng em gncY management threat corresponding with the large volume of water that could be insiavmowasly released corsryuenval m cmastr epluc dm failure Hillsborough was req;drel no produce a thorough archeological invsomry of floe reur,,u site; re perones:addidonal lard that can never be flooded for wildlife and wetland mitigation;to develop an emergency mm, emem plmm-Including a process to monitor dam safety conditions; erd to make roloswe form¢nervoir into the steam to enhance insttam flow ctadidom.