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ti rnt c Oi Col oi~+n r~U uir rinuu ~J. i. nrnM. t,~w ~~~n~ <br />iii iiiiiiiiniiiiii <br />DEPARTMENT OF NATURAL RESOURCES ggg <br />Harris D. Sherman. E.ecutive Director , <br />M1NED LAND RECLAI~LA'TION <br />723 Centennial Building, 1313 Sherman S[reet <br />Denver, Colorado 60203 Tel. (3031 8393567 <br />Hamlet J. Barry, III, <br />Director <br />July 16, 1980 <br />TO: Marion Dodson <br />~ ~~ <br />FROM: Jim Pendleton <br />RE: Western Slope arbon' Proposed Slurry Disposal Project <br />I have reviewed the "technical report for detailed design and demonstration <br />of underground disposal of coal mining waste", submitted by Western <br />Slope Carbon Company for use in their Hawk's Nest Mine near Somerset <br />Colorado. 'The proposal appears to represent a viable technique for <br />slurry backstowing of coal mine processing waste. As such, I believe <br />it is a commendable project. Zt could result in significant environmental <br />benefit in pollution control, subsidence reduction and esthetic improvement <br />over normal surface waste disposal techniques. <br />Several amendments to the proposal would be desireable. The applicant <br />should develop a subsidence monitoring program above areas of the mine <br />in which backstowing is proposed to occur, as well as comparative areas <br />in which backstowing will not be conducted. Information generated by <br />the U. S.G.S. above U. S. Steel's Somerset Mine, could serve as a representative <br />subsidence comparison. <br />The groundwater pollution potential discussed briefly on pages A-14 through <br />A-17 deserves a more thorough treatment. Z assume that the applicant <br />intends to further develop this section as a portion of the detailed <br />design proposed to occur in phase II. <br />/k <br /> <br />