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/y/~ <br />• • <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY os~co <br />Department of Natural Resources ti~ ~ goy <br />' ~~ <br />1313 Sherman 51.. Room 215 <br />Denver, CO 80203 ~ + <br />RECEIVED <br />Phone: (3071 865-3567 ~ ~aTa ~ <br />FAx: (3011 83 2-8106 <br />Roy Romer <br />July 14, 1993 JUL 2 01993 Michael B. Long <br />Division Director <br />Mr. Jon C. Kubic WaCD,PERIAITSSECTION <br />Water Quality Control Division <br />Permits and Enforcement Section <br />4300 Cherry Creek' Dr. S. <br />Denver, Co. 80222-1530 <br />RE: Permit Inactivation Request, Rockcastle Company, Grassy Gap Mine, <br />11C-81-039, NPDES permit # COG-850023 <br />Dear Mr. Kubic: <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 Division 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 adequately 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 Colorado 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 condition, 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 is 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 />quality standards. A check of the discharge record for Pond 4 indicates no <br />discharge during its history. Based on the revegetation over 95Y, 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 limits. <br />