2014-04-25_PERMIT FILE - C1982056A (3)

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Once concrete pumping operations are completed, the temporary transfer line and batch -plant will be moved off - site, and the boreholes and associated disturbance areas will be reclaimed. Boreholes will be plugged and sealed in accordance with applicable State Engineer requirements. Any residual cuttings in the cuttings pit will be allowed to dry-out, and the cuttings pit will be completely backfilled. The pad area and road will be regraded to their approximate original configuration and to blend with the surrounding terrain, the temporary diversion ditch will be removed, stockpiled soil material will be replaced, and all disturbance areas will be reseeded with TC's standard Pastureland Seed Mixture, or an alternate seed mix, if requested by the surface landowner. 16 -Left Utilitv Borehole (TR11 -78. MR12 -260 TC proposes to complete a new utility borehole, to be located over the 16 -Left (16LT) gateroads in the Western Mining District (WMD). The utility borehole will initially serve as a conduit to transfer concrete from the surface to the underground workings to provide supplemental support for an area where elevated geologic stresses were encountered in the previous longwall panel. Subsequent to this initial use, it is anticipated that the borehole will be retained and utilized as a supplemental utility borehole for transfer of concrete, gravel, or other materials to the underground workings for use in the WMD. The proposed facilities will be accessed from the paved County Road (RCR27), using the existing access for the 17 -Left Concrete Borehole (MRI 1 -253), with a new light -use road to the borehole pad location, as shown on Map 24 (4/4) and Figure 49Z -F1. The proposed utility borehole installation will require construction of approximately 1.25 mile of new light -use road from the existing 17LT access point to the borehole pad location, and construction of a new borehole pad (approximately 200 x 300 ft.). The 16LT Utility Borehole installation will consist of the new light -use road and borehole pad; adjacent soil material stockpiles, and the lined and grouted borehole extending into the active mine workings. The road disturbance corridor will be 75 feet wide, although the actual road surface will only be approximately 25 -35 feet wide. The total road disturbance area will be approximatelyl1.4 acres, and the pad disturbance area (includes cut /fill slopes and soil stockpiles) will be approximately 2.2 acres. Site - specific investigations required for design and permitting of the new utility borehole installation include a cultural resource survey and wildlife consultation. The cultural resource survey results are summarized by the survey report provided in Exhibit 6T, and a wildlife consultation letter is included in Exhibit 23C. The perimeter of all areas to be disturbed will be clearly marked and construction drainage control measures (silt fences or wattles) will be in place prior to disturbance. In order to reestablish effective vegetative cover during site reclamation, TC will recover and stockpile a maximum of 1.0 foot of soil material from the road and pad disturbance areas. A maximum of approximately 12,200 cy of soil will be recovered and stockpiled from the road disturbance area, and approximately 3,600 cy from the pad area. Natural vegetative materials incorporated into the salvaged soil materials and seeding with the soil stockpile stabilization seed mixture will assist in stabilizing the stockpiled soil material and preventing erosion or loss of soil material. Following soil recovery, appropriate designed drainage and sediment control structures will be constructed or installed. A total of nine culverts (each approximately 30 feet long) will be installed along the light -use road to pass natural drainage under the road, and the road surface will be graveled to provide all- weather access and control runoff and sediment generation. The two culverts south of the 17 -Left Pad and the culvert adjacent to the 16 -Left Pad are designed culverts, while the remaining culverts have limited contributing drainage areas, address road drainage only, and are significantly oversized (all culverts are 30 -inch diameter CMP). Sediment traps will be constructed in select locations to intercept and retain excess sediment from the road. The proposed pad location is on the side of a small knoll, so upgradient drainage will be limited. The limited amount of drainage from upgradient areas will be intercepted and routed around the borehole pad by a small designed upgradient diversion ditch along the west and north sides of the pad. Drainage from the small borehole pad will be controlled under a Small -Area Exemption by gravel surfacing on the pad surface, temporary revegetation seeding of pad cut/fill slopes, and by small interceptor ditch along the south and east sides of the pad, (size the same as the diversion ditch, although the drainage area is significantly smaller) draining through a rock sediment basin to the adjacent natural drainage Road construction will involve soil recovery, placement of culverts, scarification and recompaction of surface materials, necessary cut /fill work to establish the road profile, and placement and compaction of approximately 3 MR12 -260 2.05-45.22 04/12/12