PERMFILE120775 - Laserfiche WebLink

Home Browse Search

• 2.05.3 Two ventilation fans with steel evase and upcast structures are installed at the West Mine vent shaft/fan site as depicted on Map No. 8-7. One of the fans was relocated to another associated mine late in 1997 or early 1998. The upcast structures act to direct both mine exhaust and fan noise upward thereby minimizing impacts in the immediate area. Bonding calculations for demolition of the fans and associated foundations aze included in Volume 6A, Reclamation Costs. A rock dust storage bin was also installed at the West Mine site. To provide enhanced access to the bin by mine dusting equipment, and to alleviate environmental concerns stemming from the spillage of rock dust onto stored topsoil in the fill slope adjacent to the original bin location, the bin was moved. The current location of the bin is depicted on Maps No. 8-6A and 8-7. A new concrete foundation was poured prior to relocating the rock dust storage bin. The foundation was located within the mine bench area to be backfilled at the close of mining operations and will remain in place. As adequate bond had been established for the reclamation of the original bin site, and as no additional disturbance was required for the installation or reclamation of the new bin site, bond amounts were not revised with regard to this structure. An additional concrete foundation was poured between the West Mme shop and the crushing and screening foundation. This shop slab, depicted on Map No. 8-6A, provides for improved . equipment access and alleviates ongoing yard maintenance problems attributable to water accumulations in this area. This slab was also located within the mine bench area to be backfilled at the close of mining and will remain in place, therefore, bond amounts were not revised with regard to this structure. The overhead conveyor and stacker for coal ground storage was necessary to stockpile and load coal from the portable crushing and screening facihty into trucks for transport to the existing train load-out. This facility was designed and constructed to m;n;m;ze air and water impacts. The portable crushing and screening facility is no longer in place at the West Mme facilities. A sedimentation pond as described in Section 2.05.3 (4) was constructed using standard earthwork methods to minimize impact to the hydrologic regime. It is maintained as described in the existing approved permit. The pond area will be backfilled at final abandonment. Construction of the West Mine facilities began in early November, 1986, and were completed by February, 1987. Removal of the mine facilities will be completed during the final abandonment and reclamation phase of this facility. Refer to Section 2.05.4 -Reclamation Plan for specific information. The East Mine facilities required little modification to accommodate coal haulage from the West Mme. • To provide water to the West Mine for firefighting, underground water and domestic needs, a water pipeline and storage tank was installed. The 4" diameter PVC pipeline was buried from the TR-32 - l7 - 9/99 i~ S/o 0