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999 <br />S\~ Doc Date:12/11/2001 <br />,,..~ 2.04,6 General llydrol.ogy and Geology De~criptl.on: <br />The Blue Flame Coal Mine operation has never impacted the groundwater <br />systems and its impact on the surface hydrology is moderate. Future operations <br />in the Upper Menefee coal seam are not expected to disrupt aquifers, streams, <br />water systems, or the small watershed (upslope areas of the mine site). Hydro- <br />logic data obtained from the e:tis[i.ng minF workings and other research studies <br />show that the mining cperatien has had only .~ mild impact on water sources of <br />Hay Gulch. <br />The mininy bench or permi.e. area is located in the upper reaches of tdte <br />Ilay Gulch drainage system. A11 diversion ditches, sedimentation ponds, water <br />conveyances and storage, and tl~e surface Facilities are shown on the mine <br />surface drainage map. <br /> Surface Hydrology: <br /> Map ] shows the runoff flows in the mine plan area above the affected <br /> or disturbed area. Most of the surface runoff from the upslope areas find ics <br />•~ way into the drainage area South of the middle of the upper bench. From this <br /> area, it~runs into the Hay Gulch meadow North to the mine site. <br />Surface runoff on the pet~nit area (disturbed mine bench) is collected <br />via the drainage channels and buried pipes into n future sediment pond. <br />The sediment pond and spillways will be constructed in accordance with <br />the criteria proposed by Anne Galdrige (March 3, ]9H6 report attached). Blue <br />Flame will monitor surface water both up and down stream of the mine as tc <br />quantity and quality using criteria outlined in Section 2.04.7(2). <br />Sub-Surface Hydrology: <br />Blue Flame Coal Company has not encountered groundwater during the <br />course of normal mining operations. It is estimated that there will be a need <br />for twenty (20) gallons of water per day. <br />. ~ _ ~ ~I 2.~4 ~ <br />\~T <br />