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invertebrates. No fish would be collected since the U.S. Fish and Wildlife refused to grant <br />' permission to do so because of the endangered squawfish being planted in the river. BME <br />never heard from WQCD or received WQCD's approval of this plan. WQCD thinks it is now <br />' not necessary to do this task since the mine passed the WET test during for three water years <br />(19941997). Besides, no mine water is discharged at this time requiring WET testing. See <br />Appendix H of the Thirteenth Annual Hydrology Report 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 been sealed underground. There <br />has been no pumping of accumulated water from underground during this water year. <br />2.3 Red Wash Alluvial Monitoring Program <br />Portions of Red Wash have experienced subsidence due to longwall mining at the Deserado <br />Mine. As required by CMLRD (now DMG), BME initiated a detailed hydrology monitoring <br />program in Red Wash above the first longwall panel to be mined. The monitoring program <br />consisted of nine (9) holes drilled in the Red Wash alluvium across the predicted zone of <br />subsidence from longwall panel 1 (LW-1). Water levels in the holes were monitored before, <br />during and after active subsidence took place. The purpose of the monitoring program was to <br />determine if surtace flow in Red Wash was being lost to bedrock as the result of subsidence. <br />The monitoring data, analysis and contusions reached were submitted to CMLRD in an Interim <br />Report, November 1987, and in the Third Annual Hydrology Report, January 1988. The <br />purpose of the monitoring program was met in that it was determined that surface flow in Red <br />Wash was not lost to bedrock as a result of subsidence. The major contusions of the study <br />were: <br />• Recharge of the basal alluvium was from the upper sandstone fades (bedrocc) and <br />not from infiltration of surface runoff. <br />• Subsidence cracks in Red Wash as the result of longwall mining were quiGcly filled <br />with Gay and silt preventing loss of surface water flow to bedrock. <br />Longwall mining of panel 2 (LW-2) passed under Red Wash in September 1988. The surface <br />elevation subsided approximately 3.7 and 4.1 feet at RW-7 and RW-9 respectively. Events in <br />Red Wash over LW-2 were expected to occur in the same fashion as those seen over LW-1. <br />The subsidence trough was developed and any subsequent flow in Red Wash was expected to <br />form a pond. The pond would trap sediments carried in the flow(s) until full, at which time flow <br />in Red Wash would likely resume flowing in a relatively narrow active channel. <br />ii <br />