2020-07-02_PERMIT FILE - C1981019A

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RULE 4 PERFORMANCE STANDARDS the expansion of the Axial Basin Substation 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). In 2018, approximately 22 acres within Colowyo's permit boundary (outside of the disturbance boundary)was affected by the wild land fire caused by a lighting strike. The location of the fire is shown on Figure 4.12-6. The area that was burned is mostly comprised of pinyon juniper and low- density sagebrush. Because the fire was not related to Colowyo's mining activities, Colowyo, as the surface landowner will reseed or managed the post-fire area, as it deems appropriate. In 2019,the surface landowner replaced a culvert under the Taylor Creek Access Road(please see Map 25C for location of the road) to support long-term access up the Taylor Creek drainage. Minimal ground disturbance was associated with replacing the culvert. Since the activity is related to the surface landowner, it is not permitted and bonded for in accordance with Rule 3.02.1(2). In 2019, approximately 13.5 acres within Colowyo's permit boundary (outside of the disturbance boundary) adjacent to the Collom Haul Road was affected by the wild land fire caused by highwinds slapping power lines together. The location of the fire is shown on Figure 4.12-7. The area that was burned is mostly comprised of sagebrush. Because the fire was not related to Colowyo's mining activities, Colowyo, as the surface landowner will reseed or managed the post- fire area, as it deems appropriate. 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. 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. 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_ Rule 4 Performance Standards 4-33 Revision Date: 12/20/19 Revision No.: TR-135