2008-09-29_PERMIT FILE - C1981019A (3)

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RULE 2 PERMITS Post-mining Cross Sections (Map 20)). Final grading for topsoil placement will be done in a manner that reduces erosion and provides a surface for topsoil that minimizes slippage. Prior to completion of topsoil replacement on 3:1 (horizontal to vertical) slopes, a dozer will construct a drainage control bench or furrow, where necessary, to slow water flow on the longer slopes and minimize erosion. The design Calculations for the benches and furrows are found in Exhibit 7, Hydrology Information. At the completion of the final grading, topsoil will be redistributed over the regraded spoil and revegetated in accordance with Section 2.05.4. Other surface treatments are also described in section 2.05.4. A list of the equipment used by Colowyo in order to perform the day-to-day operation of coal mining is shown in Table 2.05-3, Equipment List. Operation Description A detailed narrative description of the land to be affected within the permit area is provided' above under the heading Production Methods and Equipment. The mining plan is graphically portrayed on the Mine Plan Map (Map 23). The various acreages to be affected by the planned mine operation are shown in Section 2.03 on Table 2.03-1, Affected Areas for Mining and Reclamation. The details of these operations are shown on the Mining Range Diagram (Map 24). The lines on Map 23 refer to coal seam mining, the lines on Map 28, Topsoil Handling, refer to the anticipated overall disturbance that not only includes coal mining, but also associated perimeter disturbances as well. These disturbances include the upper truck/shovel cuts above the "X" seam, all ramps associated with the pit, and the yearly topsoil advance. Mine Facilities The existing buildings, structures, utility corridors and other facilities are shown on the Existing Structures - North Map (Map 22A) and Existing Structures - South Area (Map 22B). Colowyo has the following major structures located in the permit area office; shop and warehouse facility; coal crushing and loadout facilities; explosives bunker; sedimentation ponds; utility lines; water lines; and haul roads. As needed, temporary facility installation will be necessary to meet Colowyo's operational needs. These structures and installed in lieu of permanent long term facilities due to the short term needs. Most of these facilities are installed overland without any major construction required. (ie concrete pads, foundations, or major excavation) Examples of these facilities are temporary pipelines and power cables. Preparation for these temporary facility locations may range from nothing to topsoil removal. In most cases only brush removal is necessary. Every effort will be made to minimize the amount of disturbance in undisturbed areas. In the case of frequent use of light duty vehicles, then topsoil will be salvaged prior to temporary facility installation. When topsoil is salvaged, either it will be windrowed, stockpiled, or placed on a regraded area prepared for topsoil placement. Some facilities require a corridor only, as in temporary pipelines or other linear facilities. A corridor will be established through brush removal if necessary. Maintenance is routinely required on these temporary facilities and therefore enough room for a light vehicle access will be maintained. If the brush does not interfere with the temporary facility or maintenance of the facility via light duty vehicles, then no brush will be removed. Colowyo generally uses a dozer to remove brush resulting in a corridor width of approximately 25 feet. This allows for the necessary vehicles to access the corridor for placement and retrieval of the facility. In all cases temporary facilities are installed in an overland fashion, minimizing the impacts to the environment. Rule 2 Permits 2.05-5 Revision Date: 6/23/08 Revision No.: MR-91