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equipped with 8 electrical receptacles hung on a one-rail structure supported by an oblong railroad rail base. <br />Bonding calculations addressing the new parking islands are presented in Appendix A. <br />The drainage around the parking area was modified as per the details provided on Map 24. The ditch between <br />the current parking area and access road was filled and runoff will be directed into Ditches D-4 and G-4. The guard <br />shack was converted into a storage building and it is located on the west end of the mobile equipment parking/material <br />storage yard. <br />In order to evaluate the existing septic system and leach field for future expansion at the mine a percolation test was <br />conducted. Approximately six, 4-inch diameter holes, 30-48" inches deep were augured for the percolation test. <br />Afrer the test was completed the cuttings were placed back in the hole. Also, an eight-foot deep backhoe pit was <br />dug so a soil profile can be obtained. Afrer the backhoe pit was logged it was backfilled. ]t should be noted that <br />the activity as shown on Map 24, Surface Facilities, would be within the boundary of the existing sediment control <br />system. <br />The bathhouse/office facility replaced the former bathhouse trailers, and was constructed adjacent to the operations <br />center as indicated on Map 24. The existing water and sewer systems were utilized for the new facility. The former <br />trailers were removed during the summer of 1993, with a portion of the resulting open area becoming part of the <br />parking lot. Water and sewer lines from these trailers were capped and covered. <br />Approximately 3,000 cubic yards of material was removed during the excavation for the foundations and slab, <br />and approximately 400 yards of compacted backfill material was used for the foundations and slab. In addition, some <br />850 tons of gravel was compacted for use beneath the foundations and slab. No other excavation work is planned. A <br />limited amount of additional dirtwork included contouring of the parking lot area where the current administration <br />trailer and parking is located, and a possible widening of the access road by some 25 feet should this become necessary <br />in the area of the new bathhouse facility. The parking area was surfaced originally with tar-sand material but this <br />material has been overlaid with asphalt, and drainage will be conveyed via the existing system. <br />The original building is of concrete block construction and has dimensions of approximately 200 feet x 75 feet. <br />Approximate height of the building is 15 feet. The building was placed on a reinforced spread footer foundation and <br />has a reinforced concrete slab floor. A ten foot expansion to the south is planned for the bathhouse area only, and <br />this will provide an additional 1,000 square feet of locker room for the workforce. The extension design and <br />structure will be matched with the existing building. The extension will require construction of piers, footings and <br />walls and a concrete slab. The extension itself will be of wood framing, insulation and metal skin. <br />A mine warehouse and maintenance shop facility underwent a change in use and now houses a general meeting <br />area and office space for mine personnel. TCC utilizes the former CYCC shop/warehouse complex to work on <br />equipment and store and dispense materials. Twentymile Coal Company also utilizes a shop area northeast of its <br />office; the shop was previously operated by Colorado Yampa Coal Company <br />MR 01-173 2.05-18 9/19/01 <br />