2018-08-08_PERMIT FILE - C1982056A

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effective drainage; and 5) Any necessary minor piping or electrical modifications. Design information for the proposed upgrades is provided in Exhibit 49V, Fuel Storage and Fueling Installation Upgrades—Design Drawings. Once these facility is no longer needed to support mining, reclamation, and related activities, the tanks and related equipment will be removed and either re-used or cleaned and disposed of. Any petroleum-contaminated fill material will be recovered and shipped off-site for treatment. The concrete pads and basin liners will be broken up, the HDPE liners will be removed, and the concrete debris and liners will be placed in the portal area and covered during final reclamation. Spill catchment basins will be backfilled in conjunction with final site grading, and the fuel storage and fueling installation areas will be regraded to blend with the surrounding terrain, topsoiled, and reseeded with the Rangeland Seed Mixture. Water Tank A 20,000-gallon water tank is proposed to be installed on the east side of the pump house. The tank is of steel construction and will be supported by a newly constructed 14 x 14 x 1 foot concrete pad. The location of this tank is illustrated on Map 24. The tank and pad will be removed when no longer needed. Surfactant Tank TCC will be moving an existing 8,000 gallon storage tank to a permanent location adjacent to the Electrical Shop. The tank will be supported by a concrete pad approximately 20 x 17 x 1 feet and enclosed in a metal building. The building will be 20 x 17 x 20 feet and tie-in to the existing shop. The building, tank, and pad will be removed when no longer required, and either placed in the portal area during final reclamation, or moved off-site. Additional Rock Dust Bin An additional rock dust bin (Rock Dust Bin #2) was constructed next to the existing rock dust bin. The bin is within a previously disturbed area where the limited site drainage is covered by a Small Area Exemption. Rock Dust Bin #2 is 35.5 feet high and has a capacity of 11,000 cubic feet. The foundation is a 22 x 24 x 1 foot steel- reinforced concrete slab extending 6 feet below grade. Four steel I-beam pillars support the bin. The location of this rock dust bin is shown on Map 24. This additional rock dust bin and pad will be removed when no longer needed. Coal Handling System (Modified and Superseded by TR07-59 for Washplant II) The original coal handling system, as shown on Map 24 (Sheet 1/3), Surface Facilities and Freshwater Systems, was designed to handle a maximum production rate of 750,000 tons per year. The system originally consisted of two conveyors, a transfer building and a stacking tube. The slope conveyor (BC-101) carries coal from the underground mine workings to the surface. The original design capacity of this conveyor was 600 tons per hour, based on a dual 150 H.P. Dowty drive and maximum length. A hydraulic take-up is used to maintain adequate belt tension. The Slope Conveyor (BC-101) discharges to the storage pile feeder belt (BC-102) at a transfer station. A flop-gate in the BC-101 discharge chute allows coal or mine development rock to bypass BC-102 and be discharged to a stacking conveyor. A stationary magnetic separator located over the BC-101 head pulley removes tramp iron from the coal stream. The magnet is moved from its operating position to dump any collected tramp iron. Conveyor BC-102 discharges to a steel stacking tube which forms a open conical storage pile. The original design capacity of BC-102 was 1,200 tons per hour, however, coal throughput is primarily a function of how much coal the slope conveyor can deliver. In addition, the crushing, tipple, and loadout coal handling facilities in the Tipple 2 area, which were constructed to serve the previous surface mining operations, were transferred to TCC, and TCC is now responsible for ongoing maintenance, permit compliance and final reclamation of these facilities. These facilities were permitted by RN 17-07 2.05-23 02/15/18