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COAL COMPANY Mr. Jim Herron Colorado Mined Land Re< 1313 Sherman Street 423 Centennial Building Denver, Colorado 80203 RECEIVED MINED LAND RECLAMATION DIVISION Calo. Dept o(Natural Resources The report includes tables indicating the inflows, discharges and consumption r water in the mine. Maps are also included which show the location of inflows in relationship to the mine workings and to Rapid and Cottonwood Creeks. The to and maps contain confidential information which Powderhorn Coal Company requ Soard to keep confidential. 1 t water inflows in the Roadside Mine. The ground water from an interface between flows into the mine. The second source of ground water is liberation of isolated zones of water in the coal seam at the active working faces in the south half of the mine. Inflows from the sections appear as wet (weeping) coal ribs and faces. The quantities of inflows cannot be measured at the working faces because of the weeping effect. However, as mining progresses up dip, more area is exposed and measureable quantities accumulate well back of the active working sections. Where mining progresses through the isolated water bear- ing zones, areas of wetted ribs can be observed rising from the floor to the roof of the active working section. There are two major sources of ground first occurs at the North Decline where alluvial gravels and bedrock seeps and Wherever water is encountered in the mine workings, it is collected into sumps. The sump water is recycled and pumped to active mine sections, the preparation plant and/or pumped to permitted discharge points. Quantities listed on the Cround Water Inflows -Locations table were measured using the Formula Q = A x V in ditches excavated by Powderhorn Coal Company to effectively control the water. No point sources of ground water have been observed in the mine. r POWDERHORN COAL COMPANY • P.O. BOX 1430 • Palisade, Colorado 81526 • (303) 464-7951