2008-01-11_PERMIT FILE - C1982056A (2)

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Buildings The original mine administrative office, a 60 x 36 foot modular trailer structure, was modified to allow for the cold weather and heavy snow-load of the azea. That administrative structure contained eleven offices for the mine staff. As the mine expanded, a new office/bathhouse complex was built to replace the modular trailers, as indicated on Map 24, Surface Facilities. In the interim, another administrative office was added for mine staff. The 36 x 56 foot trailer was located west of the original administrative office. The trailer contained a bathroom and was hooked up to the existing septic and water systems. Electrical power was supplied to the trailer by a transformer located on the east side of the trailer. The location is shown on Map 24, Surface Facilities. In 1995, a temporary office trailer with dimensions of 24 x 66 x 12 feet was leveled and blocked south of the administration building. There were no water and sewer hook-ups, and a 40-foot long buried conduit brought in power from an existing transformer. The location is delineated on Map 24. Bonding calculations addressing the temporary office trailer are presented on page 2.05-54(f)58. Parking for the administrative staff and miners is located east of the bathhouses. In order to accommodate parking requirement for mine employees and visitors, the layout of the parking area has been modified as shown on Map 24. As shown on the map, parking islands have been constructed to establish pazking corridors and walkways in the parking azea. The parking islands have curbs made of railroad track and concrete light pedestals. Connections from the light pedestals extend to elevated outlet boxes which provide cold-weather plug-ins in the pazking area. Three additional parking islands were permitted and constructed in 1995, as shown on Map 24. The new parking islands aze consistent in design with the existing islands. There aze two parking islands per line of cars. Each island is equipped with 8 electrical receptacles hung on a one-rail structure supported by an oblong railroad rail base. Bonding calculations addressing the new parking islands are presented in Appendix A. Drainage around the parking area was modified as per the details provided on Map 24. The ditch between the current parking azea and access road was filled and runoff will be directed into Ditches D-4 and G-4. The guard shack was converted into a stomge building and it is located on the west end of the mobile equipment pazking/material storage yard. In 2005, the unpaved eastern portion of the existing pazking lot (approximately 130 x 180 feet) and the mine ready-line pazking azea west of the operations center, were leveled and regraded, with excavated material being used to fill-in and bring low areas up to a consistent grade. Road-base material was subsequently brought in and compacted over the regraded pazking aeeas to establish a suitable base for paving operations. These aeeas were then paved with approximately 3-4 inches of asphalt paving material. The existing perimeter surface drainage systems were maintained or reestablished during grading, base preparation, and paving operations. In 2007, in order to accommodate an increase in the number of employees working during each shift tinder a 12-hour shift schedule, TCC regraded and paved the remaining portion of the East Employee Parking Area and truck staging area, and, in conjunction with grading/paving activities, established an Emergency Helipad. The Helipad was established as part of our overall emergency planning and preparedness program to facilitate rapid evacuation and transport of a sick or injured employee(s) to a suitable medical facility for emergency care. The paved azea was an existing graveled parking area used for overflow parking and staging/tarping of coal haul-trucks. With installation and commissioning of the Truck Loadout and West Haulroad (TR's 06-53 and 06-55) truck traffic transitioned away from the Mine Entrance/Haulroad. Paving this azea helped eliminate muddy conditions during wet weather and in the winter-time, and consequent dusty conditions when the mud dries and is pulverized by traffic. Paving required minor grading work and over-excavation of existing drainage features (drainage ditches to be retained as paved swales); base preparation, consisting of grading and placement of additional road-base; followed by placement and compaction of approximately 4 (parking area) to 6 (Helipad) inches of asphalt over an area of approximately 52,200 square feet. Prior to asphalt placement, approximately 220 feet of electrical conduit was placed and stubbed-off to facilitate future installation of site lighting. On completion of paving operations, parkirig places and the helicopter landing zone were marked with high-visibility reflective paint. In order to evaluate the existing septic system and leach field for future expansion at the mine a percolation test was t conducted. Approximately six, 4-inch diameter holes, 30-48 inches deep were augured for the percolation test. After the test was completed, the cuttings were placed back in the hole. Also, aneight-foot deep backhoe pit was MR07-220 2.05-17.3 08/29/07