2008-04-30_REPORT - C1981038 (5)

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Coal Member of Mesaverde: All previously monitored drill holes have now collapsed and are no longer monitored. The final hole, DH-60, was monitored by a long tube used to pressurize the hole and produce an estimate of water level. This tube has become ineffective. The removal of these monitoring points is explained in TR-34. Surface Water Monitoring Stations: PONDS East Roatcap Creek -Eleven ponds in the East Roatcap Creek drainage were monitored during 2007 (refer to Table 1 and Map No. 4-1 ). Ponds were monitored quarterly for water levels and field parameters if they were discharging. No evidence of mine impacts was noted. During 1994 retreat mining was done under Ponds 10-1, 10-2, 10-3, 10-4 and 10-11. Advance mining occurred under pond 88 during 1997. The East Roatcap Creek Ponds were physically intact throughout 2007 and showed no subsidence effects. Steven's Gulch -Two ponds were monitored within the Steven's Gulch drainage (refer to Table 5 and Map No. 4-1 ). Ponds 85 and 13-7 were monitored quarterly for water levels and field parameters. Pond 85 was undermined by Panel B in 1992. Pond 13-7 was also undermined during 1992. No subsidence impacts or other irregularities were evident at either of these locations during 2007. Conclusion Hydrologic monitoring was extended into the northern portion of the East Roatcap Creek drainage during 1993 to fit newly acquired lease areas and revised mine plans. Mining operations were suspended during December 1997 and have not resumed. Hydrologic monitoring conducted during 2007 did not show mine related impacts to the local hydrology were occurring. All of the monitored locations exhibited characteristics and patterns similar to previously observed data. Water quality remains good overall and no physical impacts have been noted at any of the monitored locations that would suggest adverse effects associated with the historical mining operations of the Bowie No. 1 Mine. • 4