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There are unit substations at the preparation plant, "D" Portal, the Railroad Loadout Facility, and at the <br />transfer structures for the overland conveyor, The unit substations are enclosed by chain-link fence as <br />previously described with similar foundations for transformers and switchgear. <br />Power for the overland conveyor including the railroad loadout facility, comes from the main substation <br />at the mine site. One additional 13.8-kV feeder breaker is installed in the switchgear line-up for 13.8-kV <br />mine distribution. This circuit supplies a new 13.8-kV single wood pole line constructed parallel to the <br />conveyor Flights and terminating at the loadout substation. The line was installed on the east side of the <br />corridor east of the conveyor and access road. Access during construction was via the conveyor <br />maintenance road. <br />The main power feed for the electrified railroad system is from the power plant substation. Within the <br />mine permit boundary, the railroad loop has asingle-pole bracket type catenary distribution system, <br />The 12.5-kV (13.8-kV) power line was constructed prior to any construction work at either portal as this <br />power was used to operate an air monitoring apparatus. Distribution lines were of single pole with <br />crossarm. The height of the poles was determined by required clearances over obstructions, roadways, <br />and crossings. Pole setting (depth of setting, feet) varied based on the length of the pole. Some typical <br />settings were 5.5 feet, 6 feet, and 6.5 feet far pole lengths of 30 feet, 35 feet, and 40 feet, respectively. <br />Where the poles are supporting unbalanced stresses, from dead-ending or change of direction, guying <br />and anchors were used. Existing soil removed by auger or hand was used for backfill. <br />The 138-kV line and the associated substations were consWcted prior to mine operation. After mine <br />operations cease, the 13.8-kV line and all substations will be dismantled and foundations removed. The <br />138-kV tine will remain as it will eventually connect with another 138-kV line north of the permit area. By <br />connecting the two transmission lines, the overall reliability of Moon Lake Electric Association's 138-kV <br />distribution system will be improved. <br />IV.F Water Supply and Treatment <br />The following types of water are required at the Deserado Mine facilities: <br />• Demand Fire Water <br />• Process Water <br />• Washdown and Dust Control Water <br />• Domestic Potable Water <br />Initially, the primary water source was shallow alluvial wells near the White River. However, because of <br />very high salinity of the alluvial well water, the primary water source was changed to a surface lagoon <br />Mine Permit Renewal #3 (Rev. 8/99) IV-25 <br />