2018-03-20_PERMIT FILE - C1981019A (3)

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RULE 4 PERFORMANCE STANDARDS These activities are not associated with the mining operation and will only occur outside of the permitted disturbance boundary. Please see Maps 19, 19B, and 19C for the permitted disturbance areas. The construction and/or repairs to these ranch roads will factilitate ongoing private landowner activities including ranching, grazing, hunting, and access for other entities which hold right of ways within the permit boundary. These ranch roads activities are not associated with Colowyo's mining activities, and will not be required to be permitted nor bonded for in accordance with Rule 3.02.1(2). White River Electric Assoication (WREA) will construct, operate, and maintain a 69 kV power line from the Axial Basin substation adjacent to State Highway 13 to the Collom facitlies area. This power line will be wholly owned by WREA. The ground disturbing activities associated with construction of the power line, including pole locations and roads to pole locations, are not associated with Colwoyo's mining activities, and will not be required to be bonded in accordance with Rule 3.02.1(2). The power line will service the area post -mining in Collom. 4.13 Contemporaneous Reclamation All reclamation actives, including but not limited to backfilling, grading, topsoil, replacement and revegetation, will be carried out as contemporaneously as practicable with mining operations. Implementation of the reclamation plan, as described in Section 2.05.4, will assure that each step in the reclamation process is completed in a timely manner. Because of the multi -seam nature of the mining operation described in Section 2.05, backfilling and grading cannot be completed within 180 days following the coal removal. Backfilling and grading will be completed in variance of the 180 day requirement in a manner previously approved and described below, and in Sections 2.05 and 4.14.1. As shown on the mining Range Diagram (Map 24), mining will be carried out in any one area for a considerable length of time. A series of benches will be necessary in the operation to recover the lower coal seams, and an additional series of benches will be necessary to dump the shovel/truck overburden material in a configuration that achieves the topography shown on the post - mining Topography Map (Map 19). When multi -seams are mined, backfilling and rough grading cannot begin until the lower-most seam is mined. See Spoil Grading Map (Map 29), which shows the time frames in which grading will occur in relation to the time of removal of "X" seam coal, which is shown on the Mine Plan Map (Map 23). Topsoil will be removed prior to the mining disturbance according to the timetable established on the Topsoil Handling — South Map (Map 28). As can be observed from this map, the initial topsoil removed at the operation must be stockpiled; however, as the operation progresses, topsoil can be immediately redistributed rather than stockpiled. Revegetation will commence as soon as the topsoil has been redistributed and prepared for seeding as described in Section 2.05.4. The area will be seeded with the seed mixture described in Section 2.05.4 as quickly as possible. 4.14 Backfilling and Grading 4.14.1 General Requirements The mining operations of Colowyo will not employ the use of contour mining methods. The following sample of calculations show that Colowyo does not have thin or thick overburden as defined in Subsection 4.14.4 or Subsection 4.14.5. These calculations represent the approximate conditions found in the field and show that there is always more than enough overburden to reestablish Rule 4 Performance Standards 4-35 Revision Date: 1/31/18 Revision No.: TR -119