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III IIIIIIIIIIIIIIII <br />999 <br />Mountain Coal Company <br />West Elk Mlne <br />Post OtOCe Box 591 <br />Somerset, Colorado 81434 <br />Telephone 970 9285015 <br />Fax 970 929-5595 <br /> <br />/\ <br />-~`~ <br />February ]0, ]997 <br />FEB " 3 i997 <br /> <br />Mr. Michael Boulay <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />~-~'~ ' ~ IS3/ <br /> <br />ltE: Office of Surface Mining (OSM) Surface Water Hydrology Special Focus Inspection; <br />West Elk Mine; Permit No. C-80-007 <br />Deaz Mr. Boulay: <br />The following includes responses to the conclusions and recommendations that resulted from the <br />OSM and DMG special focus inspection on surface water hydrology conducted October 17, <br />1996. The conclusions and recommendations were provided in the inspection report and again in <br />a letter dated December 9, 1996. The responses are provided in same order as presented in the <br />letter. <br />The inclusion of cation and anion balances on the laboratory analytical data is addressed in <br />the responses to the Division's request for a revision to improve the hydrologic monitoring <br />program (letter also dated December 9, 1996). <br />2. The inclusion ofchain-of-custody documents in the AHR is addressed in the responses to <br />the Division's request for a revision to improve the hydrologic monitoring program (letter <br />also dated December 9, 1996). <br />Stream dischazge measurements at the North Fork Lower station is addressed in the <br />responses to the Division's request for a revision to improve the hydrologic monitoring <br />program (letter also dated December 9, 1996). <br />4. As stated in the responses to the Division's 1993 AHIt review, the current operating <br />procedure at the Sylvester Gulch flume is to clear accumulations of sediment below the <br />flume at each visit. MCC will continue this practice. <br />5. The silt fence at the train loadout has been repositioned as requested during the inspection. <br />6. As you are aware, MCC is currently working on a revision to the Probable Hydrologic <br />Consequences (PHC) to address the B East Main inflow and water management, and expect <br />to submit the revision by February 21, 1997. <br />