2010-12-17_REVISION - C1981019 (108)

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RULE 2 PERMITS Many truck routes within the Collom area will be constructed as in -pit truck routes, due to their location within existing pit limits. Therefore, all truck routes constructed during the permit term within the immediate mining area are exempt from any construction specifications, since roadways within the immediate mining pit area are not included within the code of Colorado Regulations Definition of "road" (Rule 1.04(111)). Out of pit haul roads such as those identified on Map 23B will be designed and constructed in accordance with Rule 4.03. In general, mining area truck routes are built with a crown, are ditched on either side for proper drainage, have berms of at least axle height on outside (downslope) exposures, and only exceed grades of nine percent for distances of less than 100 yards. Typical truck routes are from 80 feet to 120 feet wide, are surfaced with sized crushed rock, and are maintained with motor graders. In order to obtain access to the Little Collom Sediment Pond, an existing two track road will be upgraded as shown on Volume 20, Exhibit 25, Item 1. This road, which is about 6,600 feet in length, has been designed to meet the applicable portions of CDRMS Rule 4.03.2 for Access Roads. It is specifically designed to meet the minimum design requirements while minimizing additional disturbed area and preventing environmental damage. The road ties to existing county road 32. The completed road will have a width of 12 feet. Use of road is for routine environmental monitoring and occasional pond maintenance only. Typical road use would consist of one trip per week by a light use vehicle using one way travel and low speed. Horizontal alignment will exactly follow existing two track road alignment and is consistent with existing natural topography. Overall grade of the road is approximately 6 %. The existing two -track road will be hard bladed to remove all vegetation and rutting and to provide a level surface across roadway, with maximum cut and fill depths of less than 2 feet. Following blading, a minimum 4 inch thickness of clean, minus 2 inch gravel shall be placed and compacted across the entire width. A triangular V -ditch approximately 18 inches in depth shall be cut on the uphill (Eastern) side of the completed roadway. Routine road maintenance will consist of occasional blading and drainage control. Any outslopes created from the construction of this access road will be seeded with the mix listed above post construction. 2.05.3 (4) Operation Plan — Ponds, Impoundments, and Diversions To control runoff, and protect surface and ground water quality, Colowyo will construct several new sedimentation structures and diversion ditches. All ponds, impoundments, and diversions are designed to meet or exceed the requirements of 2.05.3(4) and 4.05.6. All sediment ponds will be constructed and maintained in accordance with the parameters mentioned in Volume 1, Section 2.05. Impoundments will be inspected quarterly as discussed in Section 4.05.6. Please see Exhibit 23, Item 1 — Geotechnical Report Collom Temporary Spoil Pile and Pond. Also refer to Exhibit 7, Item 25 — Collom Post Mine Channel Design; Exhibit 7, Item 26 — Collom Pond Design Maps; and Exhibit 7, Item 23 (for information pertaining to diversion channels during mining) for specific designs and locations of these structures. 2.05.3 (5) Topsoil Prior to any mining related disturbances, topsoil will be removed from planned disturbance areas as discussed in Section 2.05 (Topsoil Redistribution Plan) and Section 4.06 (Topsoil) and redistributed or stockpiled as necessary to satisfy the needs of the reclamation timetable. Topsoil will be removed by large crawler mounted bulldozers, loaders or scrapers as described in Section 2.05.3, Production Methods and Equipment. Collom — Rule 2, Page 94 Revision Date: 1/23/09 Revision No.: PR -03