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

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additional conveyor was also installed to handle the waste rock generated by the mining process. A metal slop, belt -drive building with dimensions of 32 x 40 x 20 feet, located north of the existing transfer building, was constructedrn 1995, and provides electrical and mechanical support for conveyor system. Bonding calculations addressing removal of the new slope belt -drive building are, presented in Volume 1 -A. TCC's upgraded coal handling facilities provide the mine with the flexibility to convey coal at varying rates depending on demand. Uniform construction practices utilized in the facility upgrades include drivingflnstalling caissons and building grade beanis and footers to provide an adequate foundation for new or modified structures. The individual design requirements for the various structures dictate the type of foundation required. The facilities are shown on Map 24, During the upgrade, the width of the slope conveyor belt was increased to accommodate the higher tonnage. All belts and systems are sized to efficiently convey the increased tonnage. Tne existing transfer building is used to support the stepe -bolt, The new transfer building is located south of the existing transfer building. In this building, coal is transferred from the slope -belt to the stacker tube feed -belt, or waste rook is transferred from the slope -belt to the waste reek conveyor belt. The loeation of the belt has born modified to facilitate operations around the storage building. The new location, as shown on Map 24, Surface Facilities, required excavating approximately 11,000 CY of span and rerouting Ditch D-4 around the stockpile. The excavated material was either placed in the reclaim tunnel excavation or in the waste rock disposal area. The excavated spoil was sloped to I% IV or staeper depending on field conditions. If field conditions require, a safety bench will be constricted in the cut slope. Removal of this material will not impact the reclamation plan. During construction of the coal stockpile pad and haulroad, a minor amount of cut and fill Work was required, The northwestern edge of the pad and the haulroad required approximately 20,GM CY of fill. Approximately 6,000 CY of fill was required for the remainder of the area to get the pad to grade. During site preparation, some of the existing fill was removed from this area. Estimates indicate approximately 15,WO CY of material was removed, relative to the existing configuration at the time. Of this volume, approximately 12,000 CY was not suitable for construction proposes and was placed in the waste rock disposal site. Required fill material was borrowed from the spoil adjacent to the TCC portal area. The borrow area is shown on Map 24. The burrow area was graded level, and thus will provide additional storage area. The sideslopes of the borrow area were regraded to M: IV, Construction of the reclaim tunnel and laterals required excavating trenches and then constructing the tunnel within the trenches. The tunnel and laterals are constructed of concrete andtor steel. An exhausdescape tunnel extends from the reclaim tunnel. The excavated dirt was used in constructing the stockpile base. A concrete wail was constructed when the overland belt exits the reclaim tunnel. ?tppro'.cimatety 100 CY of material was removed from the borrow area and used as bedding and packing for Culverts D -2 -C: and D -F, Coal transferred from the stacker tube feed -belt to the stacker tube is stockpiled around the stacker tube. As shown on Map 24, a portion of existing Haulmad B (see CYCC Permit C- $T.p ?T }, was covered up by the coal stockpile and reclaim tunnel. This required that the haulroad be touted around the north and west sides of the coal stockpile. The haulroad proVe and typical cross - section are provided on Map 30A. 'Ile stockpiled coal sits over the reclaim tunnel and is typically fed by gravity to the overland belt by vibratory feeders. As the stockpile increases in size, however, the coal is dozed into the live coat area of the stockpile to facilitate gravity feed to the feeders, Fecders located in the reclaim tunnel feed coal onto the overland belt from the raw coal stockpile. A control building (MCC -1) is constructed adjacent to the reclaim tunnel exhaust fau. This building houses the instrumentation necessary for the reclaim system. The building is approximately 9 x 10 x 10 feet and is constructed on a 6 -inch concrete pad and 4 x 10 foot stem wall. The location of the building is shown on Map 24, When the building is no longer required, it will be removed. Overland Convenor (Mndifrad and S n rc,,e�led by TRn7 for Wg':hplant 11} The 49 -inch overland belt was constructed during 1999 to convey coal from the reclaim tunnel at the ROM Coal Stockpile to the Crusher Building at Tipple 2. Alternatively, if trucks are used for coat haulage, the coal can be 2.05 -27