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TASK 1 MOBILIZATION AND DEMOBILIZATION <br /> This Task shall comply with Specification 1.0, Mobilization / Demobilization of the General Bid <br /> Specifications, Colorado Inactive Mine Reclamation Program, 1996. <br /> Mobilization will include all machinery and equipment necessary to provide a staging area at the <br /> base of the Grand Hogback. The staging area will be sufficient in extent to provide for water <br /> storage capabilities, storage of fly ash or other fill materials and provide room for mixing and <br /> other miscellaneous activities. Sediment control and dust control must be provided so that fly <br /> ash, or other backfill materials cannot escape the site. A sediment control and dust control plan <br /> shall be delivered to Project Manager for approval prior to any backfill materials being delivered <br /> to the site. <br /> Following placement of the fill and cap,the Project Area, including the staging area, subsidence <br /> feature area, and any other areas disturbed by these reclamation activities will be cleaned of all <br /> foreign materials. Excess fly ash, cement, or other materials will be removed from the site for <br /> proper disposal by the Contractor. Any previously vegetated areas disturbed by these <br /> reclamation activities will be revegetated by the Contractor, as per section 20.0 of the General <br /> Bid Specifications. Project Manager will provide the seed, while Contractor will provide all other <br /> materials and labor. <br /> Measurement and Payment <br /> There will be no measurement for payment. Payment for this task will be reflected in a lump <br /> sum bid under Item 1 on the Bid Schedule. This lump sum bid will cover all costs for <br /> Mobilization and Demobilization. Payment shall be made as described in Specification 1.0, <br /> Mobilization / Demobilization of the General Bid Specifications, Colorado Inactive Mine <br /> Reclamation Program, 1996. <br /> A copy of the General Bid Specifications, 1996, may be obtained from: <br /> Division of Minerals and Geology <br /> 1313 Sherman Street Room 215 <br /> Denver, Colorado 80203 <br /> 303-866-3567 <br /> TASK 2 BACKFILL SUBSIDENCE FEATURE <br /> General Description <br /> The subsidence feature is located within the distinctive burn zone on the north facing side of the <br /> Grand Hogback overlooking the New Castle off-ramp of Interstate 70. The feature is a generally <br /> circular depression, measuring approximately thirty feet (30') in diameter, and varies in depth <br /> from four to ten feet (4'— 10'). Generally, the interior walls are near vertical, excepting the <br /> eastern wall, which declines toward the west. A secondary inner hole is located at the western <br /> most portion of the feature. This secondary, or, inner hole, is oblong in shape measuring an <br /> estimated fifteen feet (15') by four feet (4'). This secondary hole is a low activity vent for the <br /> underground fire, and exhausts coal combustion gasses. <br /> 3 <br />