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, <br />~ <br />AC21nc. <br />~~ Erglneerlnp end Envlranmonlal Servleee <br /> 1475 Pine Grove Road, Sure 109 <br /> P.O. l3ac 7740tH <br /> Sleambeal $prinps, Cobrad0 80477 <br /> x•879.6260 <br />I <br />1 <br />i <br />May 6, 1993 <br />Ms. Pat Nelson <br />Colorado Department of Health <br />Water Quality Control Division <br />4300 Cherryry Creek Drive South <br />Denver, Glorado 80212.1530 <br />Re: The Rockcastle Company -Grassy Creek Mine, CDPS Permit No. COG-850023 <br />Dear Ms. Nelson: <br />The Grassy Creek Mine, operated by the Roc <br />approximately 25 miles southwest of Steamboat Sf <br />stte ceased in the Tate 1980's and final reclamation c <br />in fall of 1992. Rockcastle has submitted an applip <br />to the Colorado Division of Minerals and Geologg77 <br />the Grassy Creek site. Recent conversations wilt <br />complied with all applicable rc~ttlatory provisioru <br />is antlupated during May or rely June. <br />Gompany_(Rockcutle), is located <br />Colorado. tning operations at the <br />rag related disturbance was completed <br />d relevant supponingd~c~mentation <br />~G) requesting final bond release for <br />iG Staff indiate that Rockcutle hu <br />al bond release and that [ina] release <br />The current CDPS Permit (Permit No. COG85G023) addresses control and monitoring of <br />effluent dischuge for the following discharge points: <br />001 • Pit 4 Sedimentation Pond Outlet <br />002 -Pic 3 Sedimentation Pond Outler <br />003 -Pit 2 Sedimentation Pond Outlet <br />004 • Pit 1 Sedimentation Pond Outlet <br />005 • Pits S/6 Sedimentation Pond Outlet <br />In conjunction wi[h final site reclamation, the sedimentation ponds for the Pits 1, 2, and 3 ueu <br />have been removed and auociated disturbance near reclaimed, so Dischuge Points 002 003 and <br />004 no longer exist. In addition, the sedimentation ponds for the Pit 4 and 5/6 ueu ~tave ~een <br />modified to meet USDA•SCS and Colorado Division of Water Resources requirements as stock <br />ranks or non-jurisdictional storage reservoirs, <br />Contributing drainage area have been effectively reclaimed equivalency of premising and <br />postmining sediment contributions has been documented, anr] DOMG is proceeding with the <br />necessary atttons for final bond releax. Rocltcastle is, therefore, seeking Water ~tsalityy Control <br />Division approval to discontinue monitoring and reporting atttvities under Perrrut CvG850023 <br />and retire the permit. <br />Please Qrovide anq necessary forms and/or instructions for termination of CDPS permit <br />responstbtllttes. 'Thank you for your atsistuta in this matter. <br />Sincerely, <br />ACZ Inc. <br />/JJ~yii~ <br />jer .Teton <br />JMN: c <br />ca )tL Gorham/DOMG <br />jj~~ Chubrilo/Division of Water Resources <br />D. Massey/Parcel, Mauro, Hultin do Spaanstra, PC <br />cn' .+ run' are cc ~ r cr. r,n nnu onnc.a; ~ Dent ~ n z <br />"l 1~ I T 7'~ u <br />j'f <br />