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Revision <br />February 1982 <br />seems that this water is vertical percolat ion from the gulches which is <br />accumulating in the voids, of tk~e. mine since the floor is a relatively <br />impermeable fireclay. - <br />e%`-. <br />A longwall mining operation was implemented in the fall of 1980. <br />Caving of the roof behind the longwall is estimated to be 60 feet high with <br />some fractures going higher. To date, no water has been observed seeping <br />from the caved areas. Therefore, no water bearing layers above the coal <br />have been intersected by the fractures or no such layers exist. <br />The information from the drilling programs and the observations within <br />the mine lead to several conclusions: <br />(1) The existence of fracture systems in the roof which extend to the <br />~~ ground surface under the gulches, the seasonal water flow in the <br />fracture systems, the similar water quality of the fracture water <br />to Mesaverde Formation water, and the absence of water in the <br />longwall caving area demonstrates that there are no perched <br />aquifers above the permit area. The overburden is a percolation <br />zone for vertical transmission of surface water. <br />(2) The roof, floor, and the E coal seam itself are not in direct <br />hydraulic connection with the North Fork of the Gunnison River <br />alluvial aquifer since no seasonal water flow has been observed <br />directly downdip of the subcrop, major quantities of inflow are <br />absent, and water quality of roof and floor water is similar to <br />the Mesaverde Formation water and not alluvial water. Water <br />• seeping through the roof and floor is vertical transmission <br />" through the Mesaverde Formation. Therefore, the roof, floor, and <br />the E coal seam are not aquifers. <br />2.04-25' <br />- ~_ r <br />