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TASK 1 COAL MINE WASTE EXCAVATION <br /> The coal mine waste material located behind and adjacent to the cribbing will be removed from its <br /> current location. Prior to the Project beginning, PROJECT MANAGER will delineate the margins <br /> of the waste material which is to be removed. Excavation of the coal mine waste material will <br /> occur so that all of the waste material is completely removed from the hillside, and until native rock <br /> or soil materials are exposed throughout the designated excavation area. <br /> The excavated material will be transported to the designated disposal site, which is located across <br /> Garfield County Road 127, and down the adjacent hill slope. Because the County Road will be <br /> crossed, CONTRACTOR must submit a detailed traffic management plan prior to initiating any <br /> excavation activities. The plan must include, at a minimum, provision for flag people (one located <br /> above the road crossing/work area, and one located below the crossing, /work area), clean up of <br /> the County Road, and repair of the road surface, should any damage to the black top occur. The <br /> traffic control plan must be fully implemented whenever work is occurring within the County Road <br /> Right of Way. CONTRACTOR shall bear any and all expenses in regard to implementation of the <br /> traffic control plan. <br /> In order to complete excavation of the coal mine waste, the cribbing which holds the waste in <br /> place will have to be removed. The cribbing may only be removed in a manner which does not <br /> promote failure of the coal mine waste onto the adjacent road Right of Way. In no instance will <br /> CONTRACTOR allow material to fail onto the road Right of Way. Safety of the CONTRACTOR, <br /> PROJECT MANAGER and the General Public is of paramount concern. <br /> The cribbing material itself will be removed and transported from the site for disposal by <br /> CONTRACTOR at an appropriate facility. It is not known how the cribbing is anchored to the <br /> ground surface. It is possible that rebar or other metallic pins are in place. If encountered, these <br /> materials shall be cut just below ground surface and removed from the site for proper disposal. <br /> Prior to deposition of the coal refuse material, the topsoil within the disposal area must be <br /> removed. See Task 2. Topsoil Salvage and Application. Once the disposal site is cleared of soil <br /> materials, the excavated coal mine waste material will be transported to the designated disposal <br /> area. <br /> The disposal area is an existing cut which has been excavated into a hillside. The result of the <br /> excavation is that a hill exists to the south of the excavated cut, while a steep slope which rises to <br /> County Road 127 exists to the north. The cut daylights to the south west perpendicular to a small <br /> creek at an abandoned mine entry. The cut is approximately twenty feet (20') wide, fifty to sixty <br /> feet (50' to 60') in length, and has a variable depth, which is no less than ten feet (10'). The <br /> excavation is assumed to be a stope-like feature created when coal was excavated from the area. <br /> The excavated cut is located immediately above an abandoned coal mine. The mine entry had <br /> been previously sealed, however, the roof of the mine has failed behind the seal, causing the mine <br /> to now be open about fifteen feet (15') behind the mine entry. At the point of failure, a vertical hole <br /> has developed, exposing mine timbers. This opening is located within the confines of the disposal <br /> area. Observations indicate that at the point of failure, the vertical distance between the roof of <br /> the mine and the base of excavated cut is approximately four feet (4'). The amount of cover <br /> between the roof and the excavated cut beyond the collapse feature is unknown. <br /> Initially, some of the waste material will be inserted into the mine in order to help stabilize the roof. <br /> CONTRACTOR will excavate the mine roof from the collapse feature northerly for a distance of <br /> twenty feet (20'). Excavation shall occur so that a minimum of earthen materials are introduced <br /> into the mine. Two inch (2") PolyVinyl Chloride (PVC) pipe will be placed on the floor of the mine <br /> so that it extends from fifteen feet (15') north of the edge of the roof opening excavated by <br /> CONTRACTOR , to the already in place pipe extending through the block wall closure at the mine <br /> 4 <br />