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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />t 3i 3 Sherman St., Room 27 5 C O L O RA D O <br />Denvef, Colorado 80203 DIVISION O F <br />M I N <br />RA L S <br />Phone: (303) 8663567 s <br />FAx: (303) 832.8106 G E O L O G Y <br /> RECIANATION•NININO <br /> EAFEYY•f CIf NCE <br />June 8, 2006 <br /> Bill Owens <br /> Governor <br />Ron Thompson RuESen George <br />Peak Project Management EzeclRive Director <br />34115 Co. Rd. 20.8 Ronald w. Uttanr <br />Trinidad CO 81082 Division Director <br /> Natural Resource Trustee <br />RE: 2005 Annual Hydrology Report Review, Golden Eagle Mine, #C-81-013 <br />Dear Mr. Thompson: <br />The Division has completed review of the 2005 Annual Hydrology Reports (AHR) for the Golden <br />Eagle Mine. Reporting included water level and quality monitoring of alluvial wells and water <br />level monitoring of bedrock wells and the water flooding the mine workings. <br />Monitoring Freguencv <br />The monitoring frequency was met in accordance with the approved plan during 2005 with one <br />noted exception. Due to safety concerns as a result of methane production from the mine <br />workings, no water samples could be retrieved from locations GEM-1 and GEM-2. Given the <br />continuous sampling history for these wells since the mine was sealed and the current safety <br />concerns, the Division will not consider this excursion from the plan a compliance issue. <br />Surface Water Quantity and Quality <br />Surface water monitoring has been eliminated at this site. The mine has no appreciable impact <br />to the surface water system. All sediment ponds have been removed and reclaimed. <br />Ground Water Quantity and Quality <br />Data collected during 2005 indicate no unexpected or abnormal changes to ground water levels <br />from previously reported monitoring data. Monitoring indicates a slight water level decline in SF- <br />2 to near levels measured in 2000. Water level continues to steadily decline in NM-20, possibly <br />due to local dewatering from domestic use or coal bed methane dewatering activities. <br />Well Zone Distance from <br />mined area 2000 2001 2002 2003 2004 2005 <br />NM-20 Ovbn 6000 ft 349 ft 351 ft 364 ft 369 ft 373 ft 382 ft <br />NM-21 Coal 4000 ft 739 ft 701 ft 718 ft >750 >750 >750 <br />NM-22 Ovbn 10,000 ft 407 ft 401 ft 407 ft 419 ft 409 ft 412 ft <br />SF-2 Ovbn 3000 ft 656 ft 641 ft 645 ft 645 ft 646 ft 660 ft <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geological Survey <br />