2012-05-25_PERMIT FILE - C1982056A (3)

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using conventional rotary drilling methods and drilling mud as the circulation medium to depths ranging from 1,300 to 1,600 feet. (3) Mine Facilities (a) A narrative and maps to meet the standards prescribed in 2.10, describing the location, construction modification use maintenance and removal of mine facilities in the permit area including all buildings structures and utility corridors. iI=3OWOy The existing Foidel Creek Mine surface facilities consist of building structures, material handling system, utilities, and surface areas as shown on Map 24, Surface Facilities. Previously disturbed areas within the surface facilities area may be leveled and then utilized for additional storage. 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 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 office/bathhouse 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 foriner 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. MR12 -261 2.05 -17.2 04/30/12