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~TATfi. CAF C='nr .C7RAl~C7 <br />DIVISION OF MINERALS AND GEOLOGY <br />f)eparrmenl of Natural Resources <br />1 n) Sherman 5(., Ram 115 <br />Uenvor, CU 802UJ <br />Phone: UU]I 8h6-1567 <br />FAX:11071672.8 r06 <br />July 14, 1993 <br />Mr. Jon C. Kubic <br />Water Quality Control Division <br />Permits and Enforcement Section <br />4300 Cherry Creek Or. S. <br />Denver, Co. 80222-1530 <br />r <br />n w~ <br />p ~, <br />/~-~ ~• <br />);., • <br />~ (-%r, F r <br />~ ' r• <br />h1rcMc~ B. Lon <br />.. ~ D~.actor <br />RE: Permit Inactivation Request, Rockcastle Company, Grassy Gap Mine, <br />J/C-81-034, NPDES permit >Y COG-850023 <br />Dear Mr. Kub1c: <br />Recently, a request was made by Rockcastle Coal Company to inactivate the CDPS <br />permit for the Grassy Creek (Gap) Mine. Based on your response dated May 13, <br />1993, this request was denied until such time as the Colorado Olvlsion of <br />Minerals & Geology (CDMG) is fully satisfied that the site has been adequately <br />reclaimed. It is the opinion of CDMG that this site, in Its present state, <br />has been returned to an adequateiy stable condition. <br />All point source discharge locations, with the exceptions of 001 and 005, have <br />been eliminated by reclamation of sediment ponds, and demonstration as <br />required by the Rules and Regulations of the Coiorado Mined Land Reclamation <br />Board for Coal Mining. Specifically, Rule 4.05. 2 (2) requires that sediment <br />ponds be retained until the affected area ceases to contribute additional <br />suspended solids above the premining condlti.on, and the effluent meets State <br />and Federal water quality standards, The operator adequately demonstrated <br />compliance with this Rule for all point source locations except 001 and 005, <br />and with the exceptions of points 001 and 005, the points have been removed. <br />location 001 1s Pond 4 (Pit 4), which discharges to Grassy Creek. This pond <br />has been approved as a permanent impoundment per Rule 4.05.9(1), and it is <br />intended for use as a livestock water source. Rule 4.05.9<1)(a) requires the <br />effluent from such impoundments must meet applicable State and Federal water <br />yuallly aLandard~. A Uiee.k of Lhe Uischarye rewrU fur' PunU 4 InUlCateS rro <br />discharge during its history. Based on the revegetatlon over 95X of the <br />watershed and the observations of little or no water In the pond during the <br />heavy runoff season of 1993, its our opinion this impoundment will not <br />discharge to Grassy Creek. In the event that it did, it is designed to <br />control settleable solids within appropriate 11m1ts. <br />£0' d 100' oN b£: 6 £6, b0 9flti 8b066L8£0£~ III ' ' 7FII 2~N <br />