2018-11-05_GENERAL DOCUMENTS - C1981044

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Williams Fork Mines Prepared by: R. Reilley M.S. GISP C1981044 5 November 2018 27 of indigenous plant propagules to aid in establishment of initial vegetative culture on reclaimed areas. B. The Division has determined selected overburden materials shall be used for, or as a supplement to, topsoil. This variance from the use of topsoil applies to areas at the 5A Portal, old shop, and temporary office area due to their disturbance prior to the Act and the lack of salvaged topsoil at these locations. This determination is based on physical and chemical analyses and field trials approved by the Division. Previously, Stipulation No. 2 had been attached to the permit. This stipulation was complied with upon the submission of Technical Revision No. 8. Details of the overburden analysis may be found in Exhibit 41 (4.06.2(4)(a)). IV. Sealing of Drilled Holes and Underground Openings A detailed description of the sealing of underground openings may be found in Section 2.05.4 of the permit with a typical portal seal illustrated in Figure 57. Drill hole sealing may be found in Section 2.05 of the permit. All existing and future drill holes will be sealed in accordance with Rule 4.07. The Mine No. 9 portals were sealed prior to waste material being placed at the No. 9 Mine Portal Excavation. Inspection reports indicate that sealing and initial material storage in the No. 9 Mine Portal Excavation commenced prior to 1991. The Mine No. 5 portals were sealed in 1997 in accordance with Rule 4.07.3. The No. 5 portal face-up area was backfilled, sloped and final graded. Mine No. 5A portals were sealed in 2003 in accordance with Rule 4.07.3. Backfill of the Mine No. 5A portals has not occurred at the time of this writing. V. Use of Explosives MCM is not proposing to conduct surface blasting in their mining operation. Should MCM need to conduct surface blasting in the mining operation, the requirements of this section must be addressed and submitted to the Division for approval. VI. Coal Mine Waste Banks The applicant presented a detailed engineering design for an approximately one-million-cubic- yard coal processing waste pile, also known as the Surface Waste Pile, located within the boundaries of the Williams Fork Mines permit area, as depicted on Permit Map 25. Exhibit 21 of the permit contains a design report for the coal processing waste pile prepared by CTL/Thompson, Inc., and three supplemental documents pertaining to amendments in design details and construction specifications, as well as results of inspection certifications performed by the design engineer. Collectively, these documents represent the amended design for the coal processing waste pile at the Williams Fork Mines complex. The applicant is approved to dispose of an additional 200,000 cubic yards of waste in the