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• el Grade al] ramps (included in spoil gradin9l <br />F) Topsoil replac enient <br />gl fteveg eCatron <br />Rec lamatton Costs Cacegortes <br />Beneca's experience in reclaimrng mined Ia nd has shown, for [he purpose o; estrma ti ng <br />costs. contract rec lama[ion activi[res can be grouped into [he following categcrres: <br />Direr[ Costs <br />1. BackEtlling and grading <br />2. Topsoil replacement <br />J. Revegeca[ion <br />4. Fac it iCy reclamation <br />Indirect Costs <br />1. Mobilization and demobilization <br />• 2. Engineering redesign Eee <br />1. Contractor profit and overhead <br />4. Reclamation management fee <br />5. Public liability insurance <br />6. ConCrac[o is performance bond <br />BackEilling and Grading <br />The firs[ major phase in the reclamation of mined land ~s bar kfilling and grading the open <br />pits. Although this process is discussed in detail to the Bac-kfilling and Gradino Plan <br />found in Chapter 20, an unplanned cessation of mining wi L1 usually reuse sore deviation <br />from [he original plan Early cessation generally affects the es [i mated pos [mining <br />topography, postmrnin9 drainages, and the resul[tn9 volumetric ca lcula[rons. <br /> The Etrs[ seep is [he determrnation of volumes A computer program ca lLed STd.MP was used <br /> [o determine the volu me of mac er ial and an 'average' depth of overburden in [he last pit <br /> in any one year. See Exhibit 12-2 for pi[ Locat tons The greatest vo tome then determined <br />. ch a pa rcicular year would be the "worst case' scenario. Overburden and coal thickness <br /> values. as tle[ermtned by STAMP, were used to a range diagram computer program called <br />~ Devised 7/97 <br />