INSPEC10693 - Laserfiche WebLink

Home Browse Search

Mine Entries and PorlalAreas Reclamation work consisted of portal sealing, structural demolition, backfilling and grading, drainage manipulation and revegetation work. Remnant concrete buildings, foundations and beltline foundations were left at each mine entry azea. All concrete materials were demolished to below ground surface level. The rubble generated at the mine entry azea was preferentially placed within the open portions of the mine entries, outby the seals. Excess concrete was placed against the highwalls at the entry azeas, The highwalls and the cut slopes were backfilled with earthen materials generated on site. On each portal bench, the slopes located below the benches were excavated to generate fill material for that area. Each portal area was graded to establish appropriate surface water runoff characteristics. Little or no topsoil was available to support revegetation efforts, so the in-place earthen materials were amended with straw mulch and fertilizer, which were cut into the dirt using a dozer. Each azea was then revegetated using a U.S. Forest Service approved seed mixture. An attempt was made to stabilize the steep slopes below the mine entries and the fill slopes located below the benches by revegetating them. These areas were either hand or mechanically roughened. Seed and mulch, or other surface stabilizer, were applied to each slope. On some slopes, fertilizer was applied to enhance revegetation success. Roads The access roads were reclaimed by removing culverts, and grading the roads so that upon completion the road surfaces were angled towazd the fill slope. Numerous drainage ditches were constructed in order to convey water from the inside of the road surfaces to the outside of the roads to promote natural drainage pattern establishment. Where necessary, drainage swales were constructed, and low water crossings were created where the roads intersected significant drainages. The roads were heavily scarified, and seed, fertilizer and mulch were applied. Two roads will remain at the site as permanent features. The main road from the mine entry gate, located at the confluence of Coal and Dutch Creeks, to immediately above the Lamphouse will be left as a permanent feature. This road currently provides access to and through private property located in the same area. This is currently a public right-of--way, providing non-motorized public access to U.S. Forest Service property. The second road also begins at the mine entry gate, but extends pazallel with Coal Creek past the Sutey Refuse Disposal Area. This road provides limited public access to U. S. Forest Service lands, and serves as an access to private property located further up Coal Creek. Coal basin Mine Reduced Inspection Frequency September 10, 2007 4