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amount of remaining excess material was stockpiled adjacent to the facility at the location shown on Map 24, and <br />stabilized with the approved temporary seed mixture. <br />• TCC obtained approval to establish a borrow area downslope from the wastewater Lagoons for the required clay <br />liner material. The topsoil overlying the clay material was stripped and temporarily stockpiled to one side of the <br />borrow azea to facilitate clay removal. Excess non-clay material removed during lagoon construction was used to <br />backfill the clay borrow area, and the topsoil was then re-spread and re-seeded using the approved seed mixture. <br />The clay borrow area lies within a Small Area Exemption previously approved under CYCC's C-81-071 Permit. <br />The SAE utilizes a rock check-dam and vegetative filters to control runoff and sediment, and is adequately sized to <br />control the small amount of additional disturbance (approximately 0.8 acres, 4,000 CY of borrow material). See <br />page 2.05-81 for a description of the SAE. <br />An influent pre-treatment structure was constructed on the influent line located upstream of the fast treatment pond. <br />The influent structwe is of concrete construction with an inlet line, bar screen, flume, drying rack, and discharge <br />structure. The inlet structure is approximately 18 feet long and 4 feet wide, and is constructed of reinforced <br />concrete approximately 8 inches thick. To protect the influent structure, a building approximately 1' x 12 x 9 feet <br />was constricted on a steel I-beam frame. This construction allows for removal of the building in the event <br />maintenance to the influent structure is required. The wastewater flows through a buried 6-inch PVC line into the <br />pond. The pond influent line is anchored to an inlet/outlet apron located on the bottom of the pond. Each of the <br />three treatment ponds have a set of inleUoutlet aprons. Six-inch PVC piping connects the ponds, and an overflow <br />structure is located between each of the four ponds. The overflow structures each have a 6-inch gate, and are of <br />concrete construction. <br />The effluent is chlorinated prior to discharge to the line to Site 114, and is discharged in accordance with applicable <br />provisions of the CDPHE dischazge permit. A controUchlorine contact building was constructed and contains <br />control equipment for the aerators and a system which meters the appropriate amount of chlorine into the effluent. <br />This building is approximately 16 x 12 x 9 feet and sets on a concrete pad. Power is supplied to the control <br />• building from the existing power distribution equipment at Site 114. Intermediate poles carry distribution lines <br />from Site 114 to the building and aerators. All new poles incorporate approved raptor protection features. <br />From Site 114, which is a spoil spring emanating from the reclaimed surface mine spoils, mixed flows of spoil <br />spring discharge and treated effluent can be pumped to the existing Million-Gallon Tank. The tank provides <br />supplemental surface storage for the mine-water system, Water from the tank is pumped underground and used in <br />the dust-control systems on the continuous miners and longwall shearer. A small percentage of the dust-control <br />water is carried to the surface with the run-of--mine coal and shipped as surface moisture, while the remainder is <br />diluted by mine water inflows and flows, or is pumped, to underground sumps. <br />n <br />LJ <br />MR07-215 2.05-20 05/10/07 <br />