2010-06-04_PERMIT FILE - C1982056A (9)

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Colorado Yampa Coal Company (CYCC) Office Building (MR05 -197) The former CYCC Office Building, constructed in 1967 and permitted under Permit C -81 -071, was effectively abandoned in 1982, when the Foidel Creek Mine office facilities were established. The building was used • through 2005 for records storage, but had deteriorated due to lack of maintenance and water damage from a broken water line. The building was demolished and the site stabilized in 2005. Communication Line A communication line, as shown, on Map 24, was installed to tie -in the warehouse with the existing network. A segment of the line is buried, while the remainder is hung from existing poles. Fiber -Optic Cable and Borehole (MR07 -215 A new fiber -optic cable connection will replace an existing fiber -optic communications cable at the mine portals which has both been damaged, and has deteriorated over time. A fiber -optic cable borehole will be located in a median area between the Truck -Scale (near the mine office) and the existing road to the Surface Storage Yard and Weld Shop, as shown on the Surface Facilities and Fresh -Water Systems Map, (Map 24, Sheet 1 of 3). Because it is a previously disturbed area, the fiber -optic borehole location will not require soil material salvage. The borehole will be completed, using conventional drilling techniques, with air or air /foam as the circulating medium. Using air or air /foam, and because the hole is so shallow, mud pits will not be required. The borehole surface installation will be protected by a 12 -inch I.D. surface casing extending 2 -feet above ground level and 8- feet below ground, with grout fill in the annulus between the surface and borehole casings. Four, concrete - filled steel posts, extending four -feet above ground level will mark and serve to further protect the surface installation. The grouted 4 -inch I.D. borehole will extend approximately 80 feet into the No. 2 Portal Entry. The fiber -optic cable will be carried in a conduit that is bored or trenched across to the Operations Center near the Truck - Scale, or could be routed overhead from a nearby existing pole. Boring or trenching to connect the • fiber -optic cable at the Operations Center, will require minimal disturbance, within an existing disturbed area. Undergound, the fiber -optic cable will be linked into the existing underground communications network. Wastewater Treatment Facility A new wastewater treatment facility was constructed at the Foidel Creek Mine. This facility was designed by Schmueser Gordon Meyer, Inc.,' an engineering firm located in Glenwood Springs. The facility is an aerated lagoon system, consisting of three clay -lined treatment ponds and a "polishing" pond. The facility locations are shown on Map 24, Surface Facilities. The treatment facility required the installation of sewer lines from the new bathhouse to the ponds and from an existing bathhouse, which is located behind the shop /warehouse, to the ponds. TCC has received both a site application and a discharge permit for this facility. The CDPHE renewed Discharge Permit CO- 0042161 on March 1, 1995. Prior to excavation, approximately 12 inches of available topsoil was removed and stockpiled adjacent to the facility at the location shown on Map 24. The topsoil stockpile (approximately 4,000 CY) was stabilized with the topsoil stockpile seed mixture. The cut and fill balance for the ponds is estimated at 8,237 CY of cut and 5,297 CY of fill, resulting in an excess of 2,940 CY. Each of the ponds has 3V:1H sideslopes and is approximately 10 feet deep, with, two feet of free - board. Two light -duty roads, along with an access ramp from the existing employee parking lot, were constructed into the facility. The excess cut material was utilized to construct the roads and ramp, and the roads were surfaced with aggregate to facilitate long -term use. The small amount of remaining excess material was stockpiled adjacent to the facility at the location shown on Map 24, and stabilized with the approved temporary seed mixture. TCC obtained approval to establish a borrow area downslope from the wastewater lagoons for the required clay • liner material. The topsoil overlying the clay material was stripped and temporarily stockpiled to one side of the borrow area to facilitate clay removal. MR09 -238 2.05 -19 06/26/09