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EXHIBIT 13C <br />Volume 20 Page 16 Revision Date: 2/18/20 <br /> Revision No.: MR-215 <br /> <br />Collom Pit and Temporary Spoil Pile <br /> <br />Tables 13C-23 through 13C- 27 provides the volumes necessary to backfill, regrade and reclaim <br />the Collom box cut and temporary spoil pile through the end of year 2020. <br /> <br />Table 13C-23 Collom Pit Backfill <br />Area Cut (Cubic <br />Yards) <br />Collom Pit 13,500,000 <br /> <br /> <br />Table 13C-24 Temporary Spoil Pile Removal <br />Area Total (Cubic <br />Yards) <br />Haul Distance <br />(feet) <br />Average Grade <br />(%) <br />Temporary Spoil Pile 13,500,000 3,940 3 <br /> <br /> <br />Table 13C-25 Collom Pit and Temporary Spoil Pile Topsoil <br />Area Acres <br />Disturbed <br />Topsoil Replacement <br />Volume (Cubic <br />Yards) <br />Haul Distance <br />(feet) <br />Average <br />Grade (%) <br />Collom Pit & <br />Temporary Spoil <br />Pile <br />480.5 824,231 5,144 3 <br /> <br /> <br />Table 13C-26 Collom Pit and Temporary Spoil Pile Revegetation <br />Area Acres to be Reseeded <br />Collom Pit & <br />Temporary Spoil Pile <br />560.6 <br />