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1 <br />t Fish and Wildlife retused to grant permission to do so because of the endangered aquawfish being <br />t planted in the river. WFU never heazd from WOCD or received WQCD's approval of this plan. <br />WQCD thinks it is now not necessary to do this task since the mine has been passing the WET <br />test for the last three years. See Appendix H for WQCD's letter. <br />' The toxicity problem with the mine water was limited to the first longwall district. Mining in this <br />district was completed in early 1993. The district has since then been sealed underground. There <br />' was pumping of accumulated water from this district and no WET tests were tailed during this <br />water year. The second longwall mining district water is pumped through SDH-3 and SDH-5. <br />' No toxicity was indicated during this water year. The second longwall district was also sealed in <br />order to isolate the mine fire that occured on January 31, 1996. <br />2.3 Red Wash Alluvial Monltoring Program <br />Portions of Red Wash have experienced subsidence due to longwall mining at the Deserado Mine. <br />As required by CMLRD, Westem Fuels initiated a detailed hydrology monitoring program in Red <br />Wash above the first longwall panel to be mined. The monitoring program consisted of nine (9) <br />' holes drilled in the Red Wash alluvium across the predicted zone of subsidence from longwall <br />panel 1 (LW-1). Water levels in the holes were monitored before, during and after active <br />subsidence took place. The purpose of the monitoring program was to determine if surface flow <br />in Red Wash was being lost to bedrock as the result of subsidence. <br />t The monitoring data, analysis and conclusions reached were submitted to CMLRD in an Interim <br />Report, November 1987, and in the Third Annual Hydrology Report, January 1986. The purpose <br />of the monitoring program was met in that it was determined that surface flow in Red Wash was <br />t not lost to bedrock as a result of subsidence. The major conclusions of the study were: <br />• Recharge of the basal alluvium was from the upper sandstone fades <br />(bedrock) and not from infiltration of surface runoff. <br />1 • Subsidence cracks in Red Wash as the result of longwall mining were <br />quickly filled with day and silt preventing loss of surface water flow to <br />' bedrock. <br />Although the purpose of the monitoring program was met, Western Fuels continues to monitor the <br />' Red Wash alluvial holes. The monitoring results aze reported in Appendix F and hydrographs for <br />each monitoring hole are presented in Appendix G. <br /> <br />' 16 <br />1 <br />