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• Light-Use Roads. In 2004 there will be approximately 4.0 miles of light-use roads that will be <br />reclaimed. As a general rule, these roads are not surfaced. The subgrade will be ripped, and the <br />cut/fills will be graded to cover the surface material. The culverts and embankments will be removed, <br />topsoil respread, and the area revegetated. Please see appropriate worksheets in Attachment 25-1 for <br />calculations. <br />Haul Roads. There are approximately 4.7 miles of haul road that will need to be reclaimed. The <br />surfacing material will be hauled to the pit and buried as part of the final pit grading. See appropriate <br />worksheets in Attachment 25-1 for reclamation costs. <br />Permanent Roads. There are approximately 4.2 miles of permanent haul roads. These roads will be <br />narrowed to 20 foot wide for postmining use (see Tab 13 for detailsl. These roads will take the place <br />of jeep trails that existed in the area prior to mining and add transportation routes that were not <br />available prior to mining. Refer to appropriate worksheets Attachment 25-1 for reclamation activities. <br />Fleet Determination <br />• Once the volumes for the various phases of reclamation were determined, the number of shifts, hours <br />per shift, equipment types, operator/operating efficiencies, support equipment, and overall reclamation <br />time'span had to be determined. The following discussion provides the considerations utilized in <br />determining the equipment fleet needed. <br />Production Shifts. One shift per day was used for topsoiling and finish grading. Two shifts per day <br />was used for open pit backfilling. Shifts were based on an eight-hour period per shift. A conservative <br />operating efficiency of 83 percent was used to account <br />for decreased productivity due to operator efficiency for scrapers. Fifty min/hr was used for dozers <br />due to other factors, taking darkness into consideration. <br />Equipment Type. The types of equipment selected were based on similar type equipment presently <br />operating at the mine site or could prudently be brought in for a job of this magnitude. Whenever <br />possible, Caterpillar equipment was used for reclamation due to widely published information regarding <br />costs and performance. All equipment costs were taken from those provided by CDMG. Please see <br />appropriate worksheets in Attachment 25-1 for a list of all cost factors. Equipment performance was <br />based on Cat Handbook No. 30, FPC, Means, or otherwise as noted. <br />u <br />6 Revised 11/00 <br />