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

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A fiber -optic line was installed from the coal lab to the weigh- station, located along the railroad tracks and from the lab to the main office building. The new section of line along the railroad tracks is approximately900 feet long (4 poles), and was installed on previously disturbed ground adjacent to an existing road. The section of line from the lab to the office was hung on existing poles. TCC uses three voltage regulators to increase the electrical efficiency of its power- distribution system. The regulators set on concrete pads, within a chain -link security fence, as shown on Map 24. Power for the slope -belt drive building, constructed in 1995, is provided by a buried 4,160V line running between Substation 1 and the old transfer building. The line is not buried where it drops over the portal highwall. Capacitor Banks (MR01 -174) To enhance the reliability and efficiency of the power - delivery system to the mine, YVEA installed and maintains two capacitor banks at the Foidel Creek Mine Metering location. The capacitor banks are owned by YVEA and will remain after mining, as a component of YVEA's power- distribution system. Installation of the capacitor banks resulted in incremental disturbance of approximately 0.2 acres for extension of the existing pad. Approximately 485cy (12 -18 inches), of topsoil was salvaged from the disturbance area and placed in Stockpile SF -1. A short segment of Colorado Yampa Coal Company's (CYCC) drainage channel PG 1 -2 was also relocated to accommodate construction. The channel was moved approximately 5 feet to the west of its current location. The channel was reconstructed consistent with the design approved in CYCC's permit number C -81 -071. The pad extension was constructed using approximately 700cy of select material from the refuse pile clay salvage area, supplemented by off -site borrow. Six 12 foot x 3 -foot diameter piers with an 18 -inch x 5 foot concrete slab, a 6 x 3 x 1.5 foot footer, and ten 12 foot x 3 -foot diameter piers were poured in -place to support the capacitor banks, a battery cabinet, and various dead -end structures, switches, and fuse panels. A security fence was constructed around the pad to limit access to authorized persons. Borehole Pumo Substation TCC installed the Borehole Pump Substation southwest of the PM Bay, consisting of a transformer, related switchgear, and four powerpoles,. The 50 x 50 foot area is graveled and fenced with a ten -foot high chain -link security fence. The substation ties into the existing overhead 69KV line. 69 KV Powerline and Substation CYCC constructed a 69 KV powerline to provide power to the substation that powered the 8050 dragline, in conjunction with the previous surface mining operations. Once the dragline was moved from the site, the associated trailing cable was removed, and subsequently both the powerline and substation were removed. Washplant II Powerline and Substation (TR07 -59, MR07 -222, Washplant ID A new 69 KV distribution line was extended approximately 350 feet from the existing 69KV to the Washplant II substation. Power pole installation involved the use of existing roads or limited overland access to the individual pole locations, localized shallow auger drilling to set each pole, pole placement and anchoring, and distribution of the limited drill cuttings over the small area surrounding each pole. Given the very limited temporary disturbance involved, TCC did not include topsoil recovery for the individual power pole locations. It should be noted that pole locations were selected specifically to avoid stream buffer zones or other sensitive areas. Construction of the distribution lines involved the use of existing roads or limited overland access by a bucket truck and cable truck to install cross -bars, insulators and conductors. All cross -bars have installed raptor deterrents, consistent with approved raptor protection guidelines. Installation of the new dedicated Washplant Substation required construction of a 40 x 60 foot concrete pad, enclosed by an 8 -foot high chain -link fence and installation of steel supports, transformers, and associated control and electrical switch -gear. The existing 24 -inch culvert, in the substation location, was extended approximately 120 feet to convey drainage under the substation area. 5. Light -Use Roads to Powerline Substation and Subsidence Monitoring Site TR09 -66 2.05 -47 02/17/09