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~ ~ 1 y .~\ /~,:~,., ,,,~; September 4, 1981 Mr. Edward Bischoff Reclamation Specialist Mined Land Reclamation Division 423 Centennial Building 1313 Sherman Street Denver, Colorado 80203 RE: Minor Revision Refuse Pile Dear Ed and Keith: ~II ~I~~I~~I~~~~~~I~ RECEIVED :SEP 0 ~ 131 MINED Ll.ND RECLAMAIIO"~ ~ COp.L COLO. DEPT. OF NAfURAI kE~UURC ES Mr. Keith Kirk Office of Surface Mining Brooks Towers 1020 15th Street Denver, Colorado 80202 As per our discussion on the above-referenced matter, Empire Energy through this letter requests a minor revision to the approved refuse disposal pile plan contained in its current permit. The details of the revision will be outlined below. The basic construction plan for the refuse pile remains the same as originally approved. n = vi-~,~cente.rs,;,und -the drain system toR• e.const~r•u~cted;..vth'e; amou of non-toxic overburden.to be.placed-'on=the ~p~i'le, ehd the sediment control system for the pile. The firms of CTL/Thompson, Inc. and Leonard Rice Consulting lJater Engineers, Inc. have developed plans for the pile drainage system and the sediment control system. In' regards to the drainage system for the refuse pile,"the internal drain v~iill be eliminated and replaced with a sub-surface collector drain at' the toe of the southern end of the pile. Please refer to the attached drawing for the construction plans for the location of the drain. In order to construct the collector drain system, the ground will be prepared as per the configuration exhibited in the waste bank crass-section. In order to prepare the ground surface as shown on the cross-section, the following steps must be taken: 1. Remove remaining topsoil and topsoil stockpiles. 2. Relocate existing refuse material ~iill~®/ Ii Enemy Corporation ..,SO{ItH vpgf.lfin gIgE F.1 •;]IV Ry ~ ,. . ~1l nC07. !'. nl nc.D^. ~a.~