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rebruary i -- -4v 1 B <br />1vlr. l.,L;;r V'uoanell <br />Division of Reclamation Mining and Safety <br />1313 Sherman Street, Room 215 <br />uenver_ w 020 i <br />� ,CEI E <br />rE6 15 2Dlb <br />DMMINING AND ON OF WM <br />.1'120 <br />✓ Complied f <br />✓V Violotions AUu Ku A 9 E <br />INDUSTRIES <br />Re: Permit M-1999-034 Cooley Resenoir and l ulton Wildlife Area - Technical Revision <br />ije..r I y Icr: <br />As requested by the Division during a meeting among Div ision, Aggregate Industries (Al) and <br />City of i normon t 1'nornion) representatives on ranuary 1.-C. zQ 10, ru suRinils this letter ants the <br />Clxlosca a luchnicul ,r :pion to pro:Idr anit;u—i pi-oicet,o....t the south ur.a of Phase 2 of <br />Cooley reservoir, which breached during; flooding; events from the South Platte River. <br />J1-.lerbency repairs to close the Breach, to reinforce the repaired Breach aria restore the arer. norm <br />of it to I,re-flood ele%ation .,ere performed during, July and August, 2015 by '1 horntorl's <br />contractor. The initial work repaired the breach to the extent that the river was returned to its <br />original channel. Additional work between the river and Phase 2 brought [lie breach area up to <br />< nj;--ra gToe, IJinb It li.::Itl. !Indi..T.iibdd Cldiulivl.$ vn e4i.er Nide oCtGe nrda.ot.. I l,d'u2 <br />emergency repair efforts were detailed in the Division's report of its August 19, 2015 inspection. <br />rii's proposed worn %v ill further reinforce the area Between the river anti I=nase 7. tis shown on <br />the enclosed urav,i�.gs, Area ],.xaccnt to aad norl1i of the c;-..crbcney Elikc rcl.air, -ill Be <br />backfilled using pit run from the reservoir. The ement of the backfilled area will be determined <br />by Thornion [o assure that the Fill placed will not impact Thoniton's ability to make its slurry wall <br />repairs. Type m riprap %N ill ne installed at Brea ?. a row point east of the nil area, to create a <br />controlled entrance for :rater ilo�, should the river flood again before vermanent repairs and flood <br />control mitigation is completed by Thorlllon in accordance %k iih its design build plans. Al <br />proposes to conduct its work between the time Thornton completes dewatering; of the reservoir <br />A check for the required fee for this technical revision was previously submitted to the Division <br />in November, -t;15. tv copy of the check that %vas mailed is enclosed for reference. <br />Very truly yours, <br />Connie N. Davis <br />Land Advisor <br />Enclosures <br />mggregaxe Indtasixie5 <br />Wast E.ritr-1 R�glon, Inc. <br />168% Calc t valcT..ra. 5w2c 3001 <br />Gultdcn, CO 80401 <br />lelephone. 303 985 1070 <br />An Equal Opportunity Employer <br />