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• el Grade all ramps (included in spoil grading) <br />E) Topsoil replacement <br />91 Revegetation <br />Reclamation Costs Categories <br />Seneca's experience in reclaiming mined land has shown, Eor the purpose of estimating <br />costs, contract 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 />9. Facility reclamation <br />Indirect Costs <br />1. Mobilization and demobilization <br />z. Engineering redesign fee <br />• 3. Contractor profit and overhead <br />9. Reclamation management fee <br />5. Public liability insurance <br />6. Contractor's performance bond <br />Backf illin9 and Grading <br />The first major phase in the reclamation of mined land is backfilling and grading the open <br />pits. Although this process is discussed in detail in the Backfilling and Grading Plan <br />Found in Chapter 20, an unplanned cessation of mining will usually cause some deviation <br />from the original plan. Early cessation generally aEEects the estimated postmining <br />topography, postmining drainage e, and the resulting volumetric calculations. <br /> The first step is the determination of volumes. A computer program called STAMP was used <br /> to determine the volume of material in the last pit in any one year. The greatest volume <br /> then determined this pa cc icular year would be the "worst case" scenario. overburden and <br /> coal thickness values, as determined by STAMP, were used in a range diagram computer <br />• program called RANGER. This range diagram was the basis far future volume calculations. <br /> A pit width of 110 feet was used for all pit areas. <br />2 Revised 9/99 <br />