PERMFILE41946 - Laserfiche WebLink

Home Browse Search

6. The pad areas will be fertilized (30-0-0, minimum NPK), seeded with the approved seed mix, and mulched (certified weed-free straw). 7. The access roads will be restored as closely as possible to the approximate original contour with an uneven final surface, re-seeded, fertilized, and mulched as above. A temporary seed mix as approved by the USFS may be used to accommodate azi intermediate seeding to help prevent erosion or sedimentation and noxious weed infestation on road cuts and fills. 8. The drill pads and access roads reclamation procedure outlined above will apply only to those areas newly disturbed for this proposed project. Existing roads will be left in a condition equal to or better than that observed on Mountain Coal Company's entry into the area or decommissioned according to the specifications in the COA's. 9. Any coal-recovered incidental to this project will be in the form of cuttings or core and would either be taken back to the mine site or disposed of in the mud pits. 10. MCC will perform noxious weed eradication as needed on all roads and drill pads. DRILL HOLE PLUGGING METHODS: The hole plugging method described in 43 CFR II 3484.1(a) or Colorado Division of Minerals and Geology (CDMG) Rules and Regulations at 4.07.3, states that each open hole will be plugged with cement from bottom to 50 feet above the uppermost thick coal seam and from ~0 feet below to 50 feet above any aquifers encountered in the hole. The remainder of the hole is to be filled with an approved completion mud, gel, cuttings, or cement to within 5 feet of the surface. A 5-Foot cement surface plug would be set, and an appropriately labeled monument marker to be cemented into the surface plug. Surface casing is to be cut off at or below the level of the soil surface. hi accordance with the recent Coal Program Guidance Document-Methane Drainage and Monitoring Wells, MDW wells will be plugged per DMG Rules 2.05.4 and 4.07.3 at the minimmn, recognizing that due to subsidence, daznage to the casing may preclude setting a packer within 50 feet of the perforated 7-inch casing. In such cases, the packer will be set at the lowest possible point in the well. A cement plug will be installed with trenunie line beginning at the plug and preceding a nunimum of 50 feet up the well. From that point the hole may be plugged to within 5 foot of the casing cut-off point with approved materials. The top 5 feet of the well below the sub-surface casing cut-off point (3 feet below surface) will be plugged with a cement cap. The top 3 foot of the casing will then be cutoff and the hole filled in with subsoil. A permanent marker shall be installed on top of the plug identifying the MDW. The pad will then be reclaimed to approximate original contour. Associated drill roads will be obliterated per USFS direction. 13