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• Dozers would do the backfilling and grading as this is the most cost efficient equipment other than <br />draglines given the average distances calculated. Caterpillar D11R dozers were seleded as the most <br />effident equipment to complete the regrading task. No scraper work was required to backfill the pits or to <br />insure drainage. <br />Pks will be backfifled using spoil material currently available within existing spoil rows assodated with <br />each pit. Appendix A provides appropriate cross sedions of existing and regraded post-mine topogra- <br />phy. <br />1.4.1.2 Roadway Reoradinsa <br />For purposes of estimating reclamation cost, three types of roads have been identified at Trapper Mine <br />and they are access, haulage, and dragline walk roads. These roadways an; designed and conslruded <br />to minimize amounts of cuts and fills which therefore minimizes the amount of backfilling and grading <br />that would be necessary to return them to a satisfactory coniour. Caterpillar D10R dozers were seleded <br />as the cost efficient equipment given the average distances calculated. These push distance <br />calculations and volume calculations for the roadways are based on the typical cross sedional areas. <br />These areas were applied to projected road lengths during the worst case year of 2006 as shown on Map <br />M9. From these values, times as shown in Table 1.4-5 were calculated. Costs were also included for <br />• ripping haulroads using a materal seismic velodty of 5000 fps. <br />Trapper is careful not to introduce materials on roads that will require removal at a later date. That is <br />specifically why we have not pursued the use of ash on haul roads. Roads are construded of earthen fill <br />and sub-base material with gravel on top. Scoria may also be used if available. These inert materials <br />are easily graded during reclamation, covered with topsoil and do not adversely affed the growth of <br />vegetation. Post mining land use requirements are not compromised. <br />Drainages affeded by road fills include East Buzzard, Far East Buzzard, Coyote, No-Name, Johnson, <br />West Pyeatt, Middle Pyeatt, East Pyeatt, Grouse, Sage, Oak and Flume. <br />r1 <br />U <br />z~fS~Qh <br />