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~ ~ III IIIIIIIIIIIIIIII I~IIID-CONTINENT RESOURCES, 1NC. PRODUCERS OF THE FAMOUS COAL BASIN COKING COAL 1058 COUNTY ROAD 100 • BOX 500 ~ ~ ~ ~ I CARBONDALE, COLORADO 81823 Y6e/~ MAIN OFFICE (JDJI %J~25B1 DIST RIOT OFFICE IJgJI %J-0555 WAREHOUSE IJOJI %J~JZY3 April 10, 1992 sPR i 3 1997 Mr. Michael B. Long Director Colorado Mined Land Reclamation Division 1313 Sherman Street Room 215 Denver, Colorado 80203 Dear Mr. Long: N-ined land RE: Permit No. M-82-121 This letter addresses the problems you cite in your letter of March 31, 1992, concerning the yid-Continent Limestone Quarry, operated under the above-captioned permit number in Garfield County. The following are your points of concern, and the actions MCR proposes as mitigating measures. I. "That a washout of the lower crusher fines stockpile had occurred, depositing material offsite and impacting the hydrologic balance and the yuality of surface water." In order to prevent washouts of the crusher fines stockpile, MCR proposes to slope the processing, production, and stockpile benches northward at an approximate 6% grade toward the bench walls, thus confining all precipitation and run-off mater to the inside portion of the benches themselves. Water so confined will be removed by evaporation, natural seepage, or with the crushed and transported product. Water accumulations on the benches will be limited almost entirely to precipitation falling within the gLrarry boundary by the construction of interceptor ditches as described in item 2 below. To provide for overflow protection in case of extremely large precipitation events, drainage along the inner bench wall to the natural drainage at the east side of the quarry will be provided (see mapl. TL% .501Q~ FA% IJOJI %J~7818