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• andlor temporary conveyors to storage areas southwest of the breaker and northwest of the <br />preparation plant. See Maps 15, 25 and 26. The coal was compacted to prevent spontaneous <br />combustion. Dust emission was controlled by watering. All precipitation runoff from the coal <br />storage areas passed through sediment pond DP-1. <br />A maximum of approximately 130,000 tons were stored at the D Portal Area. The temporary coal <br />storage was reclaimed by front-end loaders and conveyed to the breaker by truck and/or temporary <br />conveyors where it entered the normal processing stream. This area may be used periodically in <br />the future to temporarily store up to 50,000 tons of coal and/or coal refuse. The location of the <br />storage area is shown on Maps 26 and 27 as "Temporary Refuse Storage Area No. 2". <br />IV.C.S Preparation Plant The coal preparation plant is designed as a closed water circuit. A fine <br />coal froth floatation circuit was added in early 1993 to increase recovery of fine coal and decrease <br />the amount of refuse to be disposed. A thickener is incorporated into the circuit for removal of fine <br />solids from the process water. Thickener underFlow is further dewatered via filters. Depending upon <br />the coal contents, this fine refuse is either combined with the coarse refuse for disposal or added to <br />the clean coal circuit. The preparation plant building size is approximately 50 feet by 80 feet by 100 <br />feet high. The thickener tank is 150 feet in diameter and 12 feet high. <br />An emergency overFlow pond is used to handle unscheduled overFlows. Washdown water from the <br />• preparation plant and from the silos is collected and pumped to this pond. The emergency overFlow <br />pond is shown as PP-1 on Map 15 and 26. <br />Upon the cessation of mine operations, the breaker, preparation plant, thickener tank, sampling <br />building, and machinery at the silos will be dismantled or demolished and removed and/or buried on <br />site. The silos will be demolished and the debris buried on site. Foundations will be covered. <br />Afterwards, the areas will be regraded and revegetated according to the procedures outlined in <br />Section V. Reclamation Plan. <br />IV.C.5.a Preparation Plant Bypass System <br />A system to bypass washing of coal in the preparation plant was installed in the fall of 1995. This <br />system is installed between the existing silos and the sampling building. This system will bypass <br />some or all of the run-of-mine coal depending on the quality of coal being mined. The coal to be <br />bypassed is transferred from the bottom of the existing silos by a belt conveyor to a transfer <br />building, then to a crusher building by a second belt conveyor where it is crushed to 2" minus and <br />then transferred by another belt conveyor to the existing sampling building. <br />• ~ermfi' Kev: 4 ~ ffi~'Uti2j i'L=9 <br />