2013-01-29_PERMIT FILE - C1981022A (3)

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Section - 2.05.4 Waste paper, timbers, pipe, supplies, cardboard, and other miscellaneous trash is collected and temporarily stored in the east storage yard, with periodic pickup by a licensed disposal contractor for transport and disposal in the Delta County landfill. Scrap steel, used equipment, equipment parts, electrical cable, conveyor belting, and used tires are temporarily stored in an area near the dump station and periodically picked up by a salvage contractor. Any of these materials remaining at the time of reclamation and closure will be handled and disposed of in accordance with these normal operating practices. Debris resulting from dismantling and removal of surface structures and facilities during site reclamation activities will generally consist primarily of scrap steel and concrete rubble and will not include acid - forming, toxic - producing, or flammable materials. Demolition debris will either be hauled off -site for salvage or disposal in a licensed landfill or will be used as backfill or buried in place. Any demolition debris used as backfill or buried in place will be covered by a minimum of 2 feet of suitable non - flammable cover material. Measures for Sealine, P1 uapinQ and ManaeinQ Mine Openings and Boreholes Mine openings and boreholes, including mine portals, shafts, declines, and exploration drillholes, degasification boreholes, and fire control and monitoring boreholes will be plugged and sealed in accordance with applicable provisions of Rule 4.07 to effectively prevent access to underground mine workings and to prevent mixing of surface and ground water drainage and discharge of acid or toxic drainage to surface or ground water. Section 2.04.6 - Geology Description and Section 2.04.7 - Hydrology Description provide extensive description of subsurface physical, chemical and hydrologic properties. These sections describe the site specific geologic and hydrologic conditions for the mine permit area and adjacent areas. These sections extensively discuss 1) the lack of any definable aquifer in the coal bearing units and 2) the lack of any significant acid or toxic producing materials in the coal bearing units. Mine portals and declines will be sealed by constructing solid block seals a minimum of 25 feet in from the portal or decline surface openings as illustrated by the figure, Typical Cross - Section - Mine Seals, in Exhibit 2.05 -E5, Reclamation Details. The portal or decline entries will then be backfilled from the seals to the surface openings with soil and broken rock materials. Reclamation will be completed by backfilling and grading the areas around the backfilled openings to completely cover all portal structures, establish a stable slope configuration, and eliminate any exposed highwall areas. Mine shafts will be sealed using one of the following two methods, depending on site conditions and after consultation with the DMG: • permanent reinforced concrete cap with vent pipe, complying with applicable MSFIA requirements, could be placed over the shaft opening. • false deck could be established by installing lateral support beams into the ring beams within the shaft collar and placing decking over the support beams using either steel plate or expanded metal and reinforced concrete. The remainder of the collar would be backfilled with material previously excavated during shaft construction. Exploration drillholes, boreholes, and wells will be plugged and sealed by grouting the portion of the hole extending into and up to 20 feet above either mine workings or a water - bearing zone, backfilling the remainder of the hole to within 10 feet of the ground surface with overburden materials, drill cuttings or a bentonite type plug gel or chips, and cementing the remaining 10 feet to surface. Any casing extending above the ground surface will be cut off and the hole location marked after reclamation is completed. Gob vent boreholes consist of a steel casing already cemented in place. As noted above, OMLLC gob vent boreholes are not located in zones containing aquifers or containing acid or toxic forming TR -66 2.05 -69a Revised Mar. 2010