2020-08-21_REVISION - C1994082 (36)

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the following section, Section B (2.07.6(2)(m)). Section B The following findings and specific approvals are required by Rule 4. I Roads Rule 4.03 The Yoast Mine will utilize three types of roads within the permit area. Haul roads, comprising Roads A, B, C, D, and B Extension, were used to haul coal from the active pit and to the Hayden Station or Hayden Gulch Loadout (Road A). There is one access road in the permit area, which was used to access the explosives storage area. A number of light use roads are used to gain access to sediment ponds, topsoil stockpiles, and monitoring locations. All roads within the permit boundary are depicted on Exhibit 12-1, "Operations Plan". Detailed information regarding road construction is located in Tab 13 of the permit application. The following findings applies to roads within the Yoast Mine permit area. A. Haul Roads Alternative criteria and specifications were used during the design of haul roads. These criteria and specifications are proposed for approval by the Division following an analytical demonstration that the roads will be environmentally sound, that they will have a minimum static safety factor of 1.3, and that reclamation can be achieved. The proposed criteria and specifications pertain to portions of Haul Road D as shown on Exhibits 13- 11.4 and 13-11.5 (4.03.1(1)(e)). The Division has previously approved the retention of Haul Roads A and B depicted on Exhibits 12-1, 13-10 and 13-11 since they are compatible with the approved post-mining land use. A request for their retention was submitted by all of the landowners. The haul roads were reduced to a width of twenty feet and associated disturbance was reclaimed (4.03.1(1)(f)(i)). II Support Facilities - Rule 4.04 Support facilities used in conjunction with the Yoast Mine included a coal stockpile area, shop, warehouse, bath house, explosives storage magazines and bins, power lines and a substation, and fuel storage tanks. All facilities were constructed to prevent damage or disruption of utility lines, water wells, railroads, and pipelines which may pass over, through, or under the permit area. All support facility structures have been demolished with the exception of the power lines and substation, which have been remained as permanent features. III Hydrologic Balance - Rule 4.05 A. Water Quality Standards and Effluent Limitations All discharges of water from the Yoast mine site from storm runoff and spoil springs will pass through a sediment pond designed to ensure that all discharges meet effluent limits in Seneca Coal Company's NPDES permit for the Yoast Mine. A storm water permit and Spill Prevention, Control and Countermeasure (SPCC)plan associated with the NPDES permit also dictate preventative and mitigation measures for ensuring that all water leaving the mine site meets applicable effluent limits. 14