Laserfiche WebLink
Logan Wash Mfne TR No. 4 <br />grade and removed for disposal. The waste materials will be bound into workable bundles and <br />disposed of in the L-1 Drift. <br />Currenf Status <br />All highwall rock protection materials were removed and disposed of during the summer of <br />2003. <br />5.0 Vent Shaft Closure (Area 19) <br />The only surface structure remaining at the Logan Wash Mine is the Vent Shaft collar and <br />associated housing located on the ridge above the portals (NE'/o NW Y4 NW '/< Sec. 25, T. 7 S. <br />R. 97 W.). This vent shaft provided ventilation to the mine through drift intersections located on <br />the north side of Retort 8 in the lower, intermediate, and upper levels of the main mine. <br />The Vent Shaft area corresponds to Area 19 of the Plan. The Plan initially called for dismantling <br />and removal of structures, plugging of the raise borehole, recontouring of the ground swface, <br />ripping of compacted areas, and applying 18-inches of "topsoil-like material". Fertilizer was to <br />be added and shrubs and seed applied in accordance with slopes in Area 1. Straw mulch was to <br />be applied at 2,000 lbs/acre. <br />The vent shaft and housing is constructed on a concrete pad immediately west of the main Logan <br />Wash Road. The eastern side of the shafr collar has been buttressed with wooden cribbing to <br />support the road cut wall. The vent shaft is secured by a 6-ft high chain link fence. The vent <br />housing covers the shaft and consists of entirely of steel plating and grating materials. The <br />housing structure is approximately 10 ft high and 10 ft wide and includes a single chimney that <br />extends into two separate horizontal vents separated by a steel vane and each vent is covered <br />with grated steel. The shaft collar consists of a steel-lined casing cemented in place and welded <br />to a rectangular steel surface plate that, in turn, rests on the two steel rail beams. The steel liner <br />extends at least 30 fr underground into the shaft and approximately 15 inches above a rectangular <br />steel surface plate that is welded to the shaft liner and to two underlying 1-beams (railroad rail- <br />type). The area to be reclaimed at the Vent Shafr is less than 0.1 acre. <br />Proposed Reclamation <br />OOSI will remove and dispose of the retaining wall cribbing, chain-link fencing, vent housing <br />and extraneous concrete pad materials (concrete, rebar, etc.). The concrete pad immediately <br />adjacent to the shaft will be left in place for structural support of the shaft collar. <br />The vent shaft liner "stick-up", that portion of the vent shaft liner that is above the steel surface <br />plating, will be cut-off to the level of the steel swface plating. The shaft will then be covered <br />with Yz-inch thick steel plating. The plating cover will be welded directly to the steel surface <br />plating and overlay and match the extent of the steel swface plating. Angle iron will be welded <br />to the top of the steel plating cover and extend the full length of the steel cover plate in a <br />direction perpendiculaz to the underlying support rail beams. Additional angle iron will be <br />Western Water & Land, Inc. <br />