2017-03-23_PERMIT FILE - C1981019A

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RULE 2 PERMITS As the temporary overburden stockpile is constructed, best management practices to reduce sediment production and excess dust impacts to adjoining areas will be implemented. Interim reclamation and/or dust suppression chemcials maybe utilized to impacts, if determined to be necessary. As soon as possible after the coal is removed from the mining area and sufficient room is available for back -filling, reclamation begins. In general, rough backfilling is completed by the overburden trucks and bulldozers. Final grading will be performed to recreate a post mining topographic expression that is similar to the pre -mining topography. Moderation of some existing topographical expressions is anticipated to facilitate the stability of the reclaimed land surface; however, this is not anticipated to significantly alter the pre -mining topographical expression. Topsoil placement will be done in a manner that reduces erosion and provides a surface for topsoil that minimizes slippage. At the completion of the final grading, topsoil will be redistributed over the regraded spoil and revegetated in accordance with Section 2.05.4. Typically, after completion of topsoil replacement on 3H:1V (horizontal to vertical) slopes, a dozer will construct a drainage control bench or contour furrows, where necessary, to slow water flow on the longer slopes and minimize erosion. Other surface treatments are also described in Section 2.05.4. A list of the equipment anticipated to be used by Colowyo in the Collom permit expansion area to perform the day-to-day operation of coal mining is shown in Table 2.05.3 of the Original Permit. 2.05.3 (2) Operation Description A detailed narrative description of the land to be affected within the Collom area is provided above under the heading Production Methods. The mining plan for Collom is graphically portrayed on the Mine Plan Map (Map 2313). 2.053 (3) Mine Facilities Existing buildings, structures, utility corridors, loadout, other facilities that will support the Collom area are shown in Volume 8, Maps 21 and 22 and are discussed in Volume 1, Section 2.05.03. These facilities will continue to be used on an as needed basis. Development of Collom will require the construction of new facilities closer to the proposed pit locations (Map 2213). The approximate disturbance footprint of the facilities area is approximately 154 acres. Development of the Collom permit expansion area anticipates the need for power line, utility lines, water lines, in -pit haulage routes, crusher, and support facilities including an office, maintenance shop, and warehouse. Two haul roads (currently identified on Map 25D as West and East Haul Roads) will lead out of the Collom Pit and lead to temporaory spoil pile and the primary crusher. Coal will be loaded at the primary crusher into haul trucks designed for use on conventional roads and will be transported on a single access/haul road to the Gossard loadout. This haul road runs northeast out the mining area along the West Fork of Jubb Creek (See Map 25E — Collom Haul Road, Sheets 1-4). Main Office The main office for the Collom operation is located in Section 36, Township 4 North, Range 94 West. The office will house Colowyo's administration, engineering, environmental, accounting, and payroll departments as mining transitions from the current facilities to Collom. Refer to the Facilities Detail on Map 22B. Collom — Rule 2, Page 74 Revision Date: 12/30/16 Revision No.: TR -108