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related activities. The south end surface facilities and the additional north end facilities are <br />summarized in Table 2.05.3 -T3, New Facilities Summary. <br />Mine Ventilation System — The mine ventilation system will include two exhausting fans; one will <br />be located at a portal entry and the other on a pad above the portal and connected to the <br />underground workings by a shaft. The fan located at a portal entry is planned to be removed once <br />the ventilation shaft is complete and the second ventilation fan is operable. Only one exhaust fan <br />will be operating at a time. <br />The fan located at a portal entry will be a temporary fan mounted on a skid and connected to the <br />portal entry canopy. It will be a Spendrup fan model AMF2000- 80 -10. This fan has the capabilities <br />of exhausting 200,000 cubic feet per minute from the mine. It will be driven by a 250 hp motor. <br />The second ventilation fan will be a 96 -inch diameter Jeffery fan Model 8HUA -96 that has the <br />capacity to exhaust approximately 450,000 cubic feet per minute from the mine. The fan will be <br />driven by a 1250 hp electric motor. The mine fan will be enclosed by and connect to the shaft by a <br />steel fan shroud with explosion doors. The fan, motor, and shroud will be supported on concrete <br />footers and pads. The fan and connecting duct work will be mounted on a concrete pad 31 x 70 x 2 <br />feet, the fan will be installed on a pedestal 7 x 7 x 11 feet and two more pedestals measuring 16 x 2 <br />x 6 feet for the upcast and evas6, containing a total of approximately 208 cubic yards of concrete. <br />An upcast 90- degree duct will be connected to the evas6. The electrical building housing the fan <br />motor and control equipment will be a pre- fabricated steel building set on a 20 x 20 x 2 feet pad. <br />The motor will be mounted on a concrete pedestal 5 x 4 x 4 feet, containing approximately 5 cubic <br />yards of concrete. The total concrete contained within the building will be approximately 50 yd3. <br />Electrical Substation and Ground Field - The electrical substation will be located near the <br />entrance to the mine face -up area Electric power will be provided by Yampa Valley Electric <br />Association from an existing 69KV power line that parallels RCR27. The substation will be <br />approximately 105 x 150 feet, and will be enclosed by a security fence with locked gate to prevent <br />unauthorized access. The substation will contain transformers, capacitors, switch gear and control <br />equipment. From the substation, overhead lines will distribute power to the mine surface facilities <br />at 4,160 volts, and supported cables will transfer power to the underground operations at 12,470 <br />volts through four 8 -inch cased power boreholes, approximately 125 feet deep. <br />An adjacent area will contain a 160'x160' buried ground field for the substation. The field consists <br />of 68 - 3/4" 8' long copper ground rods driven vertically into the ground forming a 160'x160' grid <br />pattern. There is 2/0 bare copper wire interconnecting these rods in a grid. The rods are driven 10' <br />into the ground. There is 2' of soil above the ground field and then the entire field is covered by <br />crushed rock. <br />Material and Coal Storage Yards — Materials such as roofbolts, conveyor structure, timber, and <br />other consumable supplies needed for the underground operations will be stored in these areas. In <br />addition to material storage, the area will also serve as initial coal storage area. The storage yard <br />will cover a maximum area of approximately 4 acres, and will be surfaced with road -base or gravel. <br />Water Storage Tank and Pump House — The million gallon water tank includes construction of a <br />reinforced concrete pad and footers, installation of a water tank and associated pumping installation, <br />and drilling of a nominal 13 -inch borehole from the surface to the underground workings from the <br />utility pad above the portal entries. The steel water tank 85 feet in diameter and 24 feet high <br />TR -V 2.05 -14 Revision 4/12 <br />