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Rufe 2: Permits <br />(3) Mine Facilities <br />Structures <br />r 1 <br />LJ <br />All support facilities associated with the surface mine will be portable and moved as the mines <br />progress. These facilities will be limited to offices, lunch rooms. and equipment and supply <br />storage, as shown on Figure 2.05.3-5. Except for the ANFO silo, no permanent buildings or <br />structures will be constructed to support the surface mines. <br />The small (approximately one acre) service area will be located to the north of and adjacent to <br />the Jeff Canyon Haul Road, as shotsm in Figures 2.05.3-14b and 2.05.3-14c and. Map 2.05.3-2. <br />The service azea will be used for placement of portable fuel and Tube tanks, ANFO prill bin, a <br />cap house and miscellaneous equipment and parts storage. The ANFO prill bin (silo) (15 ft <br />diameter by approximately 40-ft tall) will be built on concrete piers. At reclamation, the piers <br />will be buried at least four-feet deep as part of the service area reclamation. <br />Portable fuel tanks are located within earthen structures constructed to safely contain tank <br />capacity. Transformers will be skid mounted and will reduce power from 69kV to 12,470 volts, <br />which will be distributed to the surface mine at 4,160 or 7,200 volts. Power will be supplied by <br />San Isabel Power from the transmission line which parallels the Purgatoire River. <br />Roads <br />Haul roads are located to transport coal via tractor dump-trailer and smaller trucks, and to <br />provide access for personnel and equipment. Haul road and access road preliminary designs, and <br />construction drawings were prepazed by or under the direction of a qualified registered, <br />professional engineer experienced in the design and construction of roads. Roads, including haul <br />roads, existing access roads and light use roads aze shown on Map 2.05.3-2. <br />A number of best management practices are employed to minimize erosion and contributions of <br />suspended solids to stream flow. To the extent possible, using the best technology currently <br />available, haul roads shall not cause damage to fish, wildlife, and related environmental values <br />and shall not cause additional contributions of suspended solids to stream flow or to runoff <br />outside the permit area. All exposed surfaces are stabilized (cuts in unconsolidated materials and <br />fill embankment slopes are mulched and seeded, and the travel ways.aze graveled). The entire <br />haul road system is within the permit azea. Mulching, straw bales or silt fences are used as <br />temporary measures of sediment control until vegetation protection is established. Straw bales <br />and closely-spaced cross drains and relief gaps (located at natural upland or incised drainages) <br />reduce flow velocities. Recovered topsoil may be used to promote a good vegetation cover. Slash <br />and debris may be left at the toe of embankments to trap sediment in runoff. The gravel surfaces <br />are watered to provide for dust suppression (control) from haul road traffic. <br />Page 2.05-13 (Revised 07/29/03) <br />