2012-05-15_PERMIT FILE - C1982056A

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Buildines 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 area. That administrative structure contained eleven offices for the mine staff. A second administrative office was subsequently 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 As the mine expanded, a new office/bathhouse complex was built to replace the modular trailers, as indicated on Map 24, Surface Facilities. The officelbathhouse building is of concrete block construction and has dimensions of approximately 200 x 75 feet. Approximate height of the building is 15 feet. The building was placed on a reinforced spread - footer foundation and has a reinforced concrete slab floor. The bathhouse /office facility replaced the former bathhouse trailers, and was constructed adjacent to the operations center as indicated on Map 24 In order to evaluate the existing septic system and leach field for future expansion at the mine a percolation test was 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, an eight -foot deep backhoe pit was dug so a soil profile could be obtained. After the backhoe pit was logged, it was backfilled. It should be noted that the activity as shown on Map 24, Surface Facilities, would be within the boundary of the existing sediment control system. The existing water and sewer systems were found to be adequate and were utilized for the new facility. The former trailers were removed during the summer of 1993, with a portion of the resulting open area becoming part of the parking lot. Approximately 3,000 cubic yards of material was removed during excavation for the foundations and slab, and approximately 400 yards of compacted backfill material was used for the foundations and slab. In addition, some 850 tons of gravel was compacted beneath the foundations and slab. No other excavation work is planned. A limited amount of additional dirt work included contouring of the parking lot area where the current administration trailer and parking is located, and a possible widening of the access road by some 25 feet, should this become necessary in the area of the new bathhouse facility. Water and sewer lines from the trailers were capped and covered. In 1995, another 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. In 2003, under MR01 -173, a ten -foot expansion to the south was constructed for the bathhouse area only, providing an additional 1,000 square feet of locker room for the workforce. The extension design and structure matched the existing building. The extension required construction of piers, footings and walls and a concrete slab. The extension itself is constructed with wood framing, insulation, and metal exterior sheathing and roof. 2005 Bathhouse Addition (MR05 -195) An expansion to meet future coal production requirements for the mine will require approximately 100 new employees. As a result, an addition to the existing bathhouse facility is required. The addition will be constructed on the south side of the existing bathhouse facility, connecting to the existing bathhouse. The addition will be located on a portion of a previously compacted asphalt- coated parking lot. Existing water and sewer systems will be utilized for the new facility. Roof water will be segregated and rerouted to an existing pump -line at the portal leading to the Area 1 Pit. This water is eventually utilized for underground dust control and at the wash plant. Existing surface drainage structures in the area of the addition will remain in place. The perimeter for the addition will be excavated to a depth of four feet for placement of a concrete foundation. The center portion will be excavated to approximately two feet, evaluated for compaction and backfrlled. Additional engineered -fill material will be imported to the site, as required. (See construction design or as- builts for greater detail). Foundation work will require construction of piers, footings, walls and a concrete slab. Building construction will consist of an all -metal steel post- and -arch system, with sheet -metal sheathing and internal MRl 1 -256 2.05 -17.2 08/26/11