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Inflows during 1991 failed to produce over 3 gpm for any significant period of <br />time. Currently, mine inflows remain less than 1,000,000 gallons annually. <br />Bowie Resources Limited has established an extensive monitoring system to <br />monitor water levels in colluviallalluvial deposits in the permit azea and in the <br />alluvium of streams overlying mine entries. Permeability tests on colluvium in the <br />East Roatcap Creek drainage averaged 7.2x10Zft/day. No significant water level <br />fluctuations have been noted in conjunction with mine inflows. Mine inflows in <br />the mains underlying East Roatcap Creek averaged less than 1 gpm from 1987 to <br />1993. <br />The permeability of the coal aquifer was measured in 1986 a[ 1.4x lO2ft/day. This <br />insignificant aquifer has yet to make a visible contribution to mine inflows. Bowie <br />Resources Limited imports water for dust suppression from their wells in Steven's <br />Gulch. In 1983, for example, the operator estimated that approximately 6.24 <br />million gallons of water is consumed as moisture on the coal, 0.5 million gallons is <br />consumed through increased humidity in the ventilation air, and less than 0.5 <br />million gallons is lost through seepage into the floor of the mine. <br />Surface Water - <br />The Bowie No. 1 Mine area will not significantly affect the local surface water <br />hydrology or the regional hydrology. Sediment control measures will ensure <br />protection to stream quality. No mina water will dischazge from the portals and no <br />water will be withdrawn from the creek. An overland ditch will divert water into <br />West Roatcap Creek thus bypassing the Bowie No. 1 West Mine site. Clean water <br />diversions above the main facilities minimize surface water runoff through the site. <br />Mine inflows under and adjacent to the creek are predicted to be insignificant. A <br />brief discussion of sediment control measures, subsidence impact mitigation, <br />surface water inflow predictions and water augmentation plans follow. <br />The Bowie No. 1 mine plan is designed to minimize the impacts of the project on <br />the surface water hydrology of the region. Disturbed area drainage from the mine <br />benches, pazking area, west portal fill, and loadout site is collected and treated on <br />the site. Four sediment ponds collect disturbed-area drainage from the mine <br />benches. Another pond controls sediment generated by the underground <br />development waste pile. One pond controls drainage from the run-of-mine <br />stochpile azea, and two ponds collect drainage from the disturbed azeas of the <br />loadout, truck scales, and coal stockpile azea. The west portal area drains to one <br />sedimentation pond except for exempted portions of the fill face which have a <br />small area exemption waiver. A system of lined and unlined ditches convey waters <br />from the disturbed azeas to the ponds. The mine operator has applied for and/or <br />obtained the appropriate NPDES pemuts. Effluent quality from the sedimentation <br />ponds will be monitored to determine permit compliance. <br />31 <br />