PERMFILE66021 - Laserfiche WebLink

Home Browse Search

2.05.4 page 3 Augus[ 2005 SEALING MINE OPENINGS AND DRILL HOLES In accordance with the requirements of our mine plan, 211.41 (c) 30 CFR, the portals (mine openings or entrances into the King Coal Mine) will be back-filled and seated against inflows of surface water and access by animals or people. Coal stockpile residue on the permit area will be scraped from the surface as described earlier and used for backfill inside the portals. This will limit acid-forming or toxic materials in the final plant growth medium dispersion and re•vegetation. These four portals are each approximately 10 feet wide by 8 feet high. To fill them to a depth of 25 feet will require about 296 cubic yards of material plus a small amount to account for sloughing at the inby end. Total portal backfill will require approximately 400 cubic yards of material. After back-filling to a depth of 25 feet from the portal, the mouth of the portals will be caved to completely seal them. The highwall area will then be back-filled, graded to a 2:1 slope. Coal exploration drill hole N-16 and a vent hole in the mine plan area have already been capped with concrete plugs and meet reclamation requirements. A dry well hole next to the water tank has been filled. The active well on the permit area (See Map C-4) will remain open and in active use for future use by owners of the property. This well is enclosed in a housing and collared. See Map C-3 for location(s) of any vent/air shafts or holes. GRADING AND BACKFILLING The mine has been in some form of continual operation sine the mid 1940's. Therefore, with the exception of the newly constructed coal refuse pile, the entire site falls under the Previously Disturbed category. No topsoil was salvaged prior to SMCRA ,therefore, not all areas to be reclaimed will receive topsoil. Attempts for 6" of growth medium will be replaced on the Upper Facilities Area, reclaimed highwall areas, and the refuse pile. The pond azea (Area 1) and the Lower Facilities azea (Area 2 on Map C-6) are not scheduled to receive any plant growth medium except that which may lie in and around the areas. The tipple area highwall, and shop area highwall shown on Map C-7 will be back-filled in 2 foot lifts to a slope of 2:1 utilizing mine waste and fill rock. The benches, however, will be graded and contoured to a 2.5:1 slope gradually sloping to 3:1. Analysis of stored waste, as tested by C. T. & E. is included in Appendix 9(4) (Samples #4, #5 & #6). Rock lined stilling basins will be constructed at three locations depicted on the final contour map (C- 7). The basins will be installed along with the final drainage channels after a successful Phase II Bond release, Volume for reclamation vests estimates are based on surface area delineations as well as grid surfaces calculated from existing and final contour maps using computer software programs. (See reclamation vest estimates for more details)