2010-06-04_PERMIT FILE - C1982056A (9)

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development will add approximately 2,430 acres; and Interim Phase III development will add approximately 20 acres to the affected area. Full development and mining under the PR09 -08 and TR09 -71 approvals will add . approximately 500 acres to the affected area. Areas to be developed in the WMD during the current and subsequent permit terms are shown on Map 23 Mine Plan. Alignment of development entries may be adjusted, as necessary, to address geologic conditions. The preliminary development layout will include main and sub -main development work as described in the referenced Permit Revisions. The dimension of pillars in these development areas may vary based upon mining conditions. Sumps and ventilation doglegs will be added as needed. Locations for these minor operational features are not provided on Map 23, due to the need for some flexibility in the placement of these features. During the Phase I, II, Interim III WMD development, and full development and mining, will be conducted under the Fish Creek AVF, Fish Creek, several powerlines, and several stock ponds. A more detailed discussion of undermining these structures is presented under the subsidence discussion. Because the preliminary development work (WMD, Panels 13- through 17 -Left)) will be limited to main and sub -main entry development with retention of support pillars, no subsidence will be associated with these activities. Underground Drillholes (MRO1 -172 — Withdrawn 07/11/01) (3) Mine Facilities (a) A narrative and mans to meet the standards prescribed in 2.10, describing the location construction, modification, use _maintenance and removal of mine facilities in the permit area including all buildings, structures and utility corridors. RESPONSE The existing Foidel Creek Mine surface facilities consist of building structures, material handling system, utilities, . and surface areas as shown on Map 24, Surface Facilities. Previously disturbed areas within the surface facilities area may be leveled and then utilized for additional storage. Buildings The original mine administrative office, a 60 x 36 foot modular trailer structure, was modified to allow for the cold weather and heavy snow -load of the area. That administrative structure contained eleven offices for the mine staff. As the mine expanded, a new office/bathhouse complex was built to replace the modular trailers, as indicated on Map 24, Surface Facilities. In the interim, another administrative office was added for mine staff. The 36 x 56 foot trailer was located west of the original administrative office. The trailer contained a bathroom and was hooked up to the existing septic and water systems. Electrical power was supplied to the trailer by a transformer located on the east side of the trailer. The location is shown on Map 24, Surface Facilities. In 1995, a temporary office trailer with dimensions of 24 x 66 x 12 feet was leveled and blocked south of the administration building. There were no water and sewer hook -ups, and a 40 -foot long buried conduit brought in power from an existing transformer. The location is delineated on Map 24. Bonding calculations addressing the temporary office trailer are presented on page 2.05- 54(f)58. Parking for the administrative staff and miners is located east of the bathhouses. In order to accommodate parking requirement for mine employees and visitors, the layout of the parking area has been modified as shown on Map 24. As shown on the map, parking islands have been constructed to establish parking corridors and walkways in the parking area. The parking islands have curbs made of railroad track and concrete light pedestals. Connections from the light pedestals extend to elevated outlet boxes which provide cold- weather plug -ins in the parking area. Three additional parking islands were permitted and constructed in 1995, as shown on Map 24. The new parking islands are consistent in design with the existing islands. There are two parking islands per line of cars. Each . island is equipped with 8 electrical receptacles hung on a one -rail structure supported by an oblong railroad rail base. Bonding calculations addressing the new parking islands are presented in Appendix A. Drainage around the parking area was modified as per the details provided on Map 24. The ditch between the current parking area and access road was filled and runoff will be directed into Ditches D -4 and G-4. The guard shack was converted into a storage building and it is located on the west end of the mobile equipment parking/material storage yard. TR09 -71 2.05 -17.1 11/18/09