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Introduction <br />Mine water inflow results were consistent with the predictions presented in the mining permit <br />application. <br />I~ <br />Discharged Water <br />The D-Seam mine began discharging inflow water at a rate of approximately 5 g.p.m. from <br />the underground workings during the fourth quarter of 2002. This water is directed from the <br />portal areas to Sedimentation Pond C. The estimate of mine water inflow during the first two <br />months of 2004 is about 25 g.p.m. When D9 panel was complete early in March 2004, <br />dewatering of the D-Seam ceased. Mining in the B-Seam began in January, 2004. Water <br />was encountered as the tunnels were excavated to provide access to the B-Seam in late <br />2003 and water continues to be encountered. During 2004 it was estimated the B-Seam <br />produced about l5 g.p.m. The 61, 62 and 63 panels developed during 2005 and 2006 in <br />the B-Seam are virtually dry. Development in panels 64 and 65 is also considered dry. <br />There are no specific point sources in the D-Seam or B-Seam. Water inflow into the mine is <br />associated with overlying igneous sills, sandstone channels or fractures in the roof or flow <br />from fractures in the floor. The pattern of water inflow is one of steadily decreasing flow as <br />the face mines through an area and advances away from it. <br />Most areas dry up completely within several weeks of being mined. Where areas don't dry <br />up completely, water inflow subsides to less than 1 gpm per 30 ft of entry to a few areas with <br />1-3 gpm per 30 ft of entry. These represent "damp" to "light drippers" as defined by NIOSH <br />in their Coal Mine Roof Rating System. A very few areas are classified as "heavy drippers" <br />with a flow of 3-12 gpm per 30 ft of entry. All the "dripper" areas are associated with roof <br />sandstone channels and channel margins. <br />Consumptive Use <br />The Bowie No. 2 Mine extracts dust suppression and sanitary water from the Deer Trail <br />Ditch via a pump station located on the Deer Trail ditch as shown on Map15-1 of the permit <br />application. <br />The pump station is metered. This meter records the consumptive use of water from the <br />Deer Trail Ditch. During the 2006 calendar year, the Bowie No. 2 Mine consumed 287.5 AC- <br />FT of water in order to produce 4,420,000 tons of coal. Pond evaporation is estimated at 3.8 <br />AC-FT per year. The addition of the estimated pond evaporation to the mine consumption <br />produces a consumptive use of 291.3.0 AC-FT of water for the 2006 year and is less than <br />the estimated 326.7 AC-FT indicated in the permit application. This usage indicates that <br />water for dust suppression and fire prevention and coal preparation at the Bowie No. 2 Mine <br />is currently averaging approximately 65.9 AC-FT per million tons of coal. <br />Conclusions <br />There was no water discharged from the mine during 2006. Mine Water Inflows are <br />estimated at was less than 20 gallons per minute. Approximately 180 gallons of water per <br />minute are introduced to the mine from the Deer Trail Ditch. Any sudden increase in mine <br />inflow values could be reasonably incorporated into the dust suppression process. <br />