Laserfiche WebLink
V. Sealing of Drilled Holes and Underground Openings <br />Information pertinent to sealing of mine portal openings is addressed in permit Section 3.7 of <br />the application. The applicant has committed to conform with all the applicable regulations <br />regarding the sealing and management of borings, and specifications for sealing of all <br />monitoring wells are contained within Task 011 of permit Table 3.9-6 (the reclamation cost <br />estimate). <br />The four portals at Munger Canyon were sealed with MSHA approved concrete foam in <br />1992, at varying distances in from the openings, in compliance with 30 CFR 1711-2. One of <br />the openings had apparently been filled and covered over with soil shortly after sealing. The <br />remaining openings were backfilled with soil outby the seals in early July 2000, as verified in <br />the Division's July 31, 2000 inspection report. The application indicates, in Section 3.7, that <br />the openings were backfilled with incombustible material for a distance of at least 25 feet <br />into the openings during 2000. <br />Drainage will not occur at the portals, based upon information submitted with the <br />application. <br />The Division will require that each hole, well or other underground opening be capped, <br />sealed, backfilled, or otherwise properly managed, pursuant to Rule 4.07.3. Alluvial <br />monitoring wells GW-2, GW-4, GW-7, and GW-8 were sealed by the operator in 2007, and <br />an abandonment report documenting proper sealing pursuant to 4.07.3 was submitted under <br />cover letter dated September 13, 2007. <br />The proposed operation is in compliance with the requirements of this section. <br />VI. Use of Explosives <br />No explosives will be used or stored in conjunction with this operation. None of the <br />requirements of this section apply. <br />The proposed operation is in compliance with the requirements of this section. <br />VII. Coal Mine Waste Banks <br />Narrative information pertaining to the proposed coal mine waste disposal area is presented <br />in Section 2.2.5 of the application; maps and design plans for the waste disposal area are <br />provided on Figures 2.2-6, 2.2-7, and 2.2-7A. These materials have been reviewed by the <br />Division for compliance with the Rules and Regulations. <br />Between 2004 and 2007, the operator disposed of waste material generated by operations at <br />the adjacent McClane Canyon Mine, within the coal waste disposal site in the Munger <br />Canyon permit area. Waste consisted of coal fines and rock fragments, including material <br />31