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• III IIIIIIIIIIIII III • STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Depanmem nl Namr. I Resources i S l 1 Sherman 51.. Room 21 i Ocnx~nr, Colorado HO?O7 Phnnc. 0071 Nfi6-i5fi7 FAX: 003)83:-8106 UEPARTMEfJT OF NATURAL RESOURCES May 8 1998 Roy Romer , Gorcrnor lames 5. Lochhead Me Michael G. Altivilla F.xecunve Duecmr Seneca Coal Company Michael B. Long Drvi~ion Director P.O. Drawer D Hayden, CO 81639 RE: Seneca II Mine (C-80-005) 1997 Annual Hydrology Report & Annual Reclamation Report Dear Mr. Altivilla, The Division received the 1997 Annual Hydrology Report (AHR) and Annual Reclamation Report (ARR) for the Seneca II Mine (C-80-005). Both reports were submitted in accordance with the Rules and the approved permit. The Division has the following comments; Annual Reclamation Report The backfilled azeas in the lower Wolf Creek Pit and the Auger Area E closely resemble the approved post mining topography depicted in Exltibit 12-9. On page 3 of the ARR, Seneca states that no soil balance will be submitted with any further ARR's due to the topsoil storage. The Division believes that Seneca should continue to monitor the topsoil piles until they aze completely utilized for reclamation at the Seneca II Mine. This will ensure the actual volume of topsoil stockpiled and used during reclamation. In future ARR's, Seneca should map the topsoil sampling locations as approved in TR-31. The permit requires that Seneca conduct spoil monitoring at the mine. Please inform the Division as to what spoil monitoring will be conducted in 1998. The Division was able to retrieve the ARR maps from the CD-ROM. In future ARR submittals, it would be helpful if a legend were included on the maps referencing the area, acreage and type of reclamation (graded vs. topsoiled etc ... ). Seneca has yet to submit stocktank certifications for a number of stocktanks on site including T- 15, T-16, T-20, T-25, T-26, T-28, T-30, T-31, T-33. Please submit these certifications to the Division.