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QUESTIONS FROM THE COLORADO MINED LAND RECLAMATION DIVISION <br />REGARDING GEOTECHNICAL ADEQUACY <br />Backfilling and Grading <br />Approximate Original Contour - ..illiams Fork Strip Pit No. 2 <br />The applicant requests an amendment to the currently approved <br />post-mining topography of the Williams Fork Strip Pit No. 2. A <br />proposed post-mining topography was approved as a portion of Permit <br />C-81-044. The approved configuration requires the regrading of <br />approximately 240,000 cubic yards of spoil. The applicant was <br />allowed to postpone final grading, because of installation of a <br />second set of portals for the No. 9 Mine was proposed at this <br />location. The applicant's proposed reconfiguration of the <br />post-mining topography for the pit requires the regrading of <br />appro_x_i_mately 40,000 cubic yards of spoil and results in a valley <br />form considerably more steeply sloped than the approved <br />configuration. I do not believe that the amended topographic <br />configuration compliments the natural character of the area. I <br />also believe it may present some erosional stability problems <br />because of steep slope gradients. Therefore, I recommend its <br />denial. At a minimum, the applicant will need to demonstrate that <br />their proposed amendment satisfies the requirements for approximate <br />orioinal contour. <br />RESPONSE: Please refer to the response to subsection 2f above. <br />Disposal of Underground Development Waste - No. 9 Portal <br />The applicant requests permission to dispose of underground <br />development waste within the existing No. 9 Portal incline <br />excavation. These portals are proposed to be sealed and abandoned. <br />The approved reclamation plan calls for the backfillino of the <br />existing excavated incline. The applicant proposes to utilize the <br />excavation to dispose of waste, which would increase the volume of <br />39-21 <br />