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• e) Grade all ramps (included in spoil grading) <br />f) Topsoil replacement <br />gl Revegetation <br />Reclamation Costs Categories <br />Seneca's experience in reclaiming mined land has shown, for the purpose of estimating costs, contract <br />reclamation activities can be grouped into the following categories: <br />Direct Costs <br />1. Backfilling and grading <br />2. Topsoil replacement <br />3. Revegetation <br />4. Facility reclamation <br />Indirect Costs <br />1. Mobilization and demobilization <br />2. Engineering redesign fee <br />• 3. Contractor profit and overhead <br />4. Reclamation management fee <br />5. Public liability insurance <br />6. Contractor's performance bond <br />Backfilling and Grading <br />The first major phase in the reclamation of mined land is backfilling and grading the open pits. <br />Although this process is discussed in detail in the Backfilling and Grading Plan found in Chapter 20, an <br />unplanned cessation of mining will usually cause some deviation from the original plan. Early <br />cessation generally affects the estimated postmining topography, postmining drainages, and the <br />resulting volumetric calculations. <br />The first step is the determination of volumes. A computer program called STAMP was used to <br />determine the volume of material in the last pit in any one year. The greatest volume then determined <br />this particular year would be the "worst case" scenario. Overburden and coal thickness values, as <br />determined by STAMP, were used in a range diagram computer <br />• program called RANGER. This range diagram was the basis for future volume calculations. A pit <br />width of 1 70 feet was used for all pit areas. <br />2 Revised 9/99 <br />