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Sttricn - 1.05.3 V. Filtration Field and Wastewater Treatment System -The existing filtration field • consists of a system of French drains which receive the effluent from septic tanks 1«ated at the shop, office, and bathhouse facilities. With rel«ation of the mine office, shop, and warehouse the existing leach field will serve only the existing bathhouse facilities and a new leach field and septic tank(s) will be established in the vicinity of the new or rel«ated facilities. The new wastewater treatment system, consisting of one or more septic tanks and a sanitaryleach field has been established adjacent to the relocated facilities to serve the new mine office, shop, and warehouse facilities. W. Substation No. 1 -Substation No. 1 is the main transfer point for electric power for operation of the surface facilities 1«ated in the Elk Creek facilities area. This substation receives power from the main transmission line from the Juanita Substation I«ated southwest of the mouth of Bear Creek The existing Substation No. 1 was removed in conjunction with expansion of the Elk Creek coal st«kpile. A new substation was constnrcted jtsst south of the existing mine office. The new substation consists of a concrete slab; buried grounding field; control building; steel support structures; transformers, control and switching equipment; and protective steel perimeter fence with 1«king access gate. In conjunction with rel«ation of Substation 1, a segment of the existing powerline which presently crosses lower Elk Creek Canyon was rel«ated to the notth to provide adequate clearance for the new st«kpile transfer conveyor and stacking rubes, and other feed and distribution lines were ako rel«ated or constructed. The new poles required for rel«arion of the main powerline were set and accessed From an existing powerline road on the west side of the canyon, an existing exploration drilling road on the east side, and the new West Valley Haul Road. Approximately 3,100 feet of additional light-use roads were constructed to access new pole I«ations. Delta-Montrose Electrical Ass«iation waz responsible for all powerline rel«ation activities and tie-ins. On completion of powerline rel«ation activities, all azs«iated disturbance areas were reseeded to control erosion, however, the azs«iated light-use roads have been retained for powerline access and maintenance. X Coal Laboratory - This is a strucnual steel building on a concrete foundation. It serves az the coal sample preparation and analysis laboratory. Y. Equipment and Material Storage Areas -Mme consumable supplies and parts including such items az roof bolts, timbers, conveyor belting, conveyor idlers, scrap equipment and parts, and other materials and supplies are stored in several open storage areas. These areaz include pottions of the East Yana area, the area adjacent to the mine water treatment pond, two areaz on Elk Creek near the explosives storage area, and an area to the west of the existing coal lab and bathhouse, In conjunction with expansion of [he Elk Creek soil st«kpile, materials stored near the explosives storage area were either disposed of or moved to the Eazt Yard storage area. Z. R«k Dust Storage Bins -The r«k dust storage consists of two steel tanla supported on structural steel columns, l«ated in the Elk Creek Facilities Area. With development of the Elk Creek Mme, these storage tanks will be moved up Elk Creek Canyon to a l«ation in the vicinity of the Elk Creek Mine Ventilation Shafu. AA Explosive Magazines -The explosive magazines were in two buildings 1«ated in excavated bunkers. The buildings were of cinder bl«k and concrete construttion. Earth-filled [nine cars formed a bamcade on the opening to the explosive storage area. These magazines provided storage for the powder and blasting caps used at the PR04 2.05-16 Revised August 2000