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MCC West Elk Mine Sunset Trail Lease Modifications 2011 Hydrology Survey 8 <br />approximately 17,250 ft2 (0.40 acres) and 18,675 ft2 (0.43 acres), respectively. The pond at site <br />7 was approximately 1,350 ft2 (0.03 acres) in size. The pond elevations ranged from 8,627 to <br />8,688 feet amsl. The temperatures ranged from 7.9 to 8.8° C; pH values ranged from 6.71 to 6.92 <br />s.u., and the electrical conductivity values ranged from 136.7 to 201 µOcm. <br />February 2012 HydroGeo, Inc. <br />