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• 2.05.3(2)(b) <br />of the proposed sedimentation pbnd and associated drainage system is in Section <br />2.05.3(4). This proposed sedimentation pond is necessary to allow for access <br />to the proposed Red Canyon #2 Mine. The present sedimentation pond is in <br />the location of the proposed portal site for the Red Canyon N2 Mine. Refer <br />to the Proposed Surface Disturbance Map, 2.05.3(2)(8)-1. <br />When the proposed sedimentation pond is complete and the drainage system <br />is established, excavation for the proposed portal site will begin. As can <br />be seen on the Proposed Surface Disturbance Map, 2.05.3(2)(b)-1, the present <br />sedimentation pond is in the location that Grand Mesa Coal Company proposes <br />to construct the portals and to its yard area for the Red Canyon ~2 Mine. <br />Excavation for the portals, therefore, cannot begin until the proposed sedimen- <br />tation pond is operational. <br />When the water is pumped out of the present sedimentation pond, excavation <br />work for the proposed portals and yard area for access to the Red Canyon <br />~2 Mine will begin. The present dam will be removed with dozers and earthmover. <br />Topsoil in the proposed portal site will be removed and handled as in Section <br />2.05.3(5). There is approximately 1150 cubic yards of topsoil to be removed <br />to a depth of nine inches. Overburden will be removed as described in Section <br />2.05.3(6). There will be approximately 35,000 cubic yards of overburden <br />removed. All of the overburden material will be used to construct a bench <br />south of the proposed portals. Overburden will be removed to an elevation <br />of 6300 at the portal entrance and at a ten percent grade to the south of <br />the portal entrance. Refer to the Proposed Surface Disturbance Map, 2.05.3 <br />(2)(b)-1, and Drawings 2.05.3(2)(b)-1 and 2.05.3(2)(b)-2 for cross sections <br />and proposed contours. The bench will be constructed from an elevation of <br />85 (Revised 1-8-88) <br /> <br />