2012-01-30_REPORT - C1981018 (2)

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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 QaI -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, TW2 -7L 2 -7U, 2 -7M, 2 -7L 35 -4U, 35 -4L RM -1 35 -4M 36 -2U, 36 -2L BME also requested that the monitoring frequency be reduced to annual for all bedrock wells and quarterly for alluvial well QaI -5 and the water sampling requirement be annual for QaI -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, QaI -2, QaI -3, QaI -4 and QaI -6 have been destroyed and are no longer available for monitoring. Alluvial well QaI -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. Per the DRMS permit requirements, water from the groundwater monitoring holes 29 -4M, 30 -8M, 31 -7M, 32 -7M, and 33 -8M in Leases C -8424 and C -8425 were sampled and analyzed during the 1996 -1997 water year. Appendix 1 of the Thirteenth Annual Hydrology Report provides the analytical results. Monitoring hole 32 -7M was sampled prior to being mined out in 2001 and 30 -8M before it had a chance to drain after being completely mined around in late 2006. Data is provided in Appendix C of the Seventeenth Annual Hydrology Report for 32 -7M and the Twenty Third Annual Hydrology Report, for 30 -8M. 3