2008-02-04_REPORT - C1981018 - Laserfiche WebLink

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simplicity. The Deserado Mine coal seams are located near the bottom of the Coal and Siltstone Facies (middle zone). Water levels were measured in the groundwater monitoring piezometers according to the schedule in Appendix A. The water level is measured quarterly in Qal-5, and samples collected annually to analyze for the water quality parameters listed in Table 2-1. As a part of the mid-term review technical revision (TR48), DRMS approved discontinuing the monitoring of the following wells: TW2-7U It has remained dry TW2-7L It has remained dry 2-7U It has remained dry 2-7M It has remained dry 2-7L It has remained dry 35-4U It has remained dry 35-4L It has remained dry RM-1 It has remained dry 35-4M This hole is venting methane; presumed dry 36-2U This well is in a sealed, inactive mining area 36-2L This well is in a sealed, inactive mining area BME also requested that the monitoring frequency be reduced to annual for all bedrock wells and quarterly for alluvial well Qal-5 and the water sampling requirement be annual for Qal-5. DRMS approved BME's application on November 10, 1998. These changes took effect for the 1998-1999 water year. During October 1984, the Taylor Draw Reservoir facilities were completed and the reservoir began filling with water. The area around the alluvial groundwater holes became a shallow water mud flat area with the deposition of mud, silt and sand at high reservoir levels. As a result, alluvial groundwater monitoring holes Qal-1, Qal-2, Qal-3, Qal-4 and Qal-6 have been destroyed and are no longer available for monitoring. Alluvial well Qal-5 is still being monitored. During May 1987, longwall panel 1 was mined past the location of 2-12U. The location was subsided and the monitoring hole could no longer provide usable data. Accordingly, Western Fuels, Utah (now BME) applied for a Technical Revision on 6/7/88 to eliminate groundwater monitoring at 2-12U. The Technical Revision was subsequently approved. 3