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there will never be more than four ungraded spoil rows (including the active one) at any one <br />time. <br />Topsoiling and Seeding <br />After final grading of the spoil ridges, topsoil is placed on the spoil to a depth of 18 inches on <br />cropland and 12 inches on rangeland. A variation of+/- 2 inches is allowed due to compaction <br />and operational considerations. Areas are then seeded with one of three main seed mixes, <br />depending on the elevation. Seed mixes contain various native grasses, forbs and shrubs, while <br />the lowest elevation site seed mix contains only grasses and forbs. Shrub clumps of <br />approximately 1.6 acres are also located throughout the reclaimed areas. Seeding occurs by both <br />drill and broadcasting methods. <br />Long -Term Ash Disposal Plan <br />The applicant continues to backfill Ashmore pit with ash from the Craig Power Plant. Ash will <br />also be disposed in Enfield/Derringer pit. The ash is approximately 60% fly ash, 20% bottom <br />ash, and 20% scrubber sludge. A maximum of 5,250 tons per day of the waste will be disposed <br />of at the Trapper Mine with an average of 1,222 tons per day expected. This is equivalent to an <br />average annual volume of waste of about 231 acre-feet, after compaction. The applicant expects <br />this waste burial process will continue for the life of the mine. Down -gradient ground water <br />monitoring wells are in place to detect any potential degradation of the ground water due to <br />leachate through the ash waste pile. <br />Page 12 <br />Trapper RN7 Prepared by: R. Reilley <br />Nov 2017 <br />