2009-04-23_REVISION - C1981028 - Laserfiche WebLink

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TECHNICAL REVISION NO. 40 MODIFICATION OF THE RECLAMATION CONTOURS ACROSS THE LONG-TERM SPOIL AREA COORS ENERGY COMPANY PERMIT NO. C-1981-028 In submitting this Technical Revision No. 40, Coors Energy Company (CEC) seeks to modify the final contour over the area known as the Long Term Spoil Area (LTSA). This area, identified in Appendix Q-1 of the Keenesburg Mine Permit, Permit Number C-1981-028 (the "Permit"), has been the source of material for both the intermediate and final cover of ash in the ash disposal pits ("A" & "B"). The necessity for this permit modification stems from a revised engineering evaluation of the remaining versus the required overburden (spoil materials from the LTSA) volumes. The evaluation was initiated by American Environmental Consulting, LLC (AEC). This evaluation has been refined over the past few years as the annual topographic mapping has been completed in greater detail. The final determination is that the LTSA, as it is currently configured, has a shortfall of approximately 58,098 bank cubic yards (bey) of overburden material necessary to complete the reclamation work in B-Pit. Since Section 2.05.4 of the Permit indicates that "major disturbed areas will be returned to their approximate original contour", CEC proposes that the approximate original contour be modified across the LTSA to better meet the soil cover requirements while also blending to the existing perimeter contours to remain consistent with the drainage plan. When viewed across the entire acreage encompassed by the Permit, CEC believes that these contour changes are consistent with the intent of the term `approximate", as used therein. Submitted with this application are copies (3 each) of the following: Reclamation Contour and Drainage Plan Map - as Revised: This is Appendix Q-1 to the Permit, and is updated each year in the Annual Hydrology and Reclamation Report (AHR Report). Letter dated 4/7/2008 from AEC to CEC describing the evaluation, and providing the proposal with respect to the LTSA. CEC is not seeking an adjustment to the bonding amounts with this Technical Revision since the lands subject to this proposed revision are already included in the calculation of "total area remaining to be reclaimed" (2008 AHR Report, page 77). No new mining activity is proposed by this Technical Revision. Further, the activities proposed by this Technical Revision No. 40 require no placement of dredge or fill material, or any excavation associated with a dredged or fill project, either temporary or permanent, in waters of the United States. The Division's approval of this Technical Revision No. 40 to modify the final contour over the Long Term Spoil Area, is hereby requested.