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• equipment, and overall reclamation time span had to be determined. The following <br />di scuseion provides the considerations utilized in determining the equipment fleet needed. <br />Production Shifts. One shift per day was used for topsoiling and finish grading. Two <br />shifts per day were used Eor open pit backfilling. Using two shifts per day would allow <br />for preventative maintenance and minor equipment repair co occur on third shift, if <br />needed. Shifts were based on an eight-hour period per shift. A conservative operating <br />efficiency of 83 percent was used [o account Eor decreased productivity due to operator <br />efficiency for scrapers. Fifty min/hr was used for dozers due to other factors, taking <br />darkness into consideration. <br />Equipment Type. The types of equipment selected were based on similar type equipment <br />presently operating at the mine site or could prudently be brought in for a job of this <br />magnitude. Whenever possible, Caterpillar equipment was used for reclamation due to <br />widely published information regarding costs and performance. All equipment costs were <br />taken from those provided by DMG. Please see appropriate worksheets in Attachment 25-1 <br />Eor a list of all cost factors. Equipment performance was based on Cat Handbook No. 30, <br />• EMF, Means, FPC, or otherwise as noted. <br />equipment and operator performance factors were based on generally published and accepted <br />criteria (see individual worksheet s~. Operator wages were all based on inEocma[ion <br />supplied by DMG. <br />Reclamation Time Frame. A reasonable Cime frame for a job of this magnitude is estimated <br />at approximately 1300 hours for backfilling and grading, and 1100 hours for topsoiling. <br />Assuming three D11 dozers working two shifts per day backfilling and grading and four 63'1 <br />scrapers topsoiling one shift per day, total project time is estimated at a months. This <br />is assuming some topsoiling overlaps the backfilling and grading. <br />Indirect Costs <br />The following is an estimate of indirect costs associated with the reclamation of the <br />Seneca II-W Mine. <br />• Mobilization and Demobilization Costs. Mobilization and demobilization costs were based <br />on mobilizing the major pieces of equipment. The guidelines set forth in the OSM <br />7 Revised 03/01 <br />