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PERMFILE110240
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PERMFILE110240
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Last modified
8/24/2016 10:07:07 PM
Creation date
11/24/2007 7:37:59 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007A
IBM Index Class Name
Permit File
Doc Date
7/10/2003
Section_Exhibit Name
Exhibit 69 Section A I. Initial Project Description
Media Type
D
Archive
Yes
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Mountain Coal Company <br />West Elk Mine <br />Exhibit 69 <br />Sylvester Gulch Facilities <br />hoist building, Fans, ductwork, fan motor houses and standby generator for the fans. The <br />contractor will back-fill, compact, re-grade, and re-gravel, if necessary any areas <br />disturbed on the benches during construction, and return all drainage surfaces to their <br />original configuration prior to shaft construction. No excess waste rock, soil or coal will <br />remain at the shaft site after the permanent facilities are completed. <br />Construction of the roads, substation, powerlines, and shaft site benches will occur in one <br />construction season. Construction of the shafts will occur over approximately 18 months, <br />spanning two construction seasons. These facilities will be built for life-of--mine service, <br />which is estimated to be approximately 25 years. <br />Reclamation <br />The total wetland impact caused by this project is estimated to be 0.69 acres. Wetland <br />impacts will be mitigated according to a plan approved by the U.S. Army Corps of <br />Engineers. <br />It is estimated that it will take approximately six months to complete all the major steps <br />in the reclamation plan. The plan would involve demolishing the major structures first <br />(fans, hoist, substation, power poles and lines, etc.), sealing the ventilation shafts and <br />sealing the electric borehole and the degasification hole. The small facility pads <br />(substation, degasification hole, electric borehole, and the roads to these areas, including <br />the powerline water tank road), would be reclaimed. The Shaft #1 and #2 site, the Shaft <br />#3 site and road, and the sediment pond would be reclaimed, and then the main haul <br />access road would be reduced to a light-use road. As areas are reclaimed, topsoil will be <br />replaced and the areas seeded and mulched. <br />As the completion of the electric borehole and degasification hole included completely <br />grouting and casing the holes to prevent surface and ground water from entering the hole, <br />the holes will be reclaimed by cutting the surface casing below grade and sealing the <br />holes in accordance with Rule 4.073(]). <br />Reclamation of the three ventilation shafts will include removal of the hoisting facilities, <br />removal of the ventilation fans facilities and sealing of the ventilation shafts. All <br />structure foundations will be removed. The concrete collar pads will be removed from <br />the three shafts. The ventilation shafts will be sealed by constructing a steel and concrete <br />plug ten (]0) feet below the ground surface that will span each shaft and support a <br />concrete seal. A concrete seal will be constructed that will fill the entire inside diameter <br />of each lined shaft and completely seal the opening from ten (l0) feet below the ground <br />surface to within three (3) foot of the ground surface. Suitable fill material will be used <br />to cover the concrete seal to the level of the surrounding terrain. This sealing method will <br />be used for the three ventilation shafts and complies with MSHA regulations and is <br />designed to prevent access to the mine workings by people, livestock, fish and wildlife <br />and machinery. Drawings entitled Typical Shaft Seal - Ventilatron Shaft #3, are included <br />13 Nov. 1996 PR07R; Revived Muy 1997 MR21 h <br />Revised Jul. 1997 MR219; Revised June 2003 MR297 <br />
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