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-2- <br />Coal from the mine will be passed through a rotary breaker where <br />+4" rock will be removed and sent to a refuse bin. The minus 4-inch <br />material is sent through a gravity separation process which removes <br />refuse material from the run of mine coal. The refuse material larger <br />than the No. 28 sieve is dewatered by a series of screens and may <br />possibly be centrifuged. Material passing the No. 28 sieve is <br />dewatered in a thickener and sent to the refuse bin. <br />Coal waste will be transported from the portal area to the waste <br />disposal site lh' means of 35 ton 769 caterpillar trucks. The waste <br />disposal sites are located in a drainage which trends in an easterly <br />direction through Sections 22, 23, 26 and 27. The disposal sites are <br />located in the small valleys north and south of the main drainage <br />channel. Initially, disposal areas will be onstructed in the <br />vicinities of Test Holes R-1 through R-4 and RP-1 through RP-4 as <br />shown on Fig. 3. The coal waste will be placed in the disposal area • <br />in compacted lifts. The waste disposal piles will vary in height <br />between 50 and approximately 90 feet. They will be reclaimed by <br />placing a layer of non-toxic fill over the coal pile and revegetating <br />the area. <br />Sedimentation pords will be constructed below the refuse <br />disposal areas in the vicinity of Test Holes RP-1, RP-2,3 and RP-4. <br />The sedimentation ponds will be constructed with a 3:1 upstream slope <br />and a 2:1 downstream slope. The embarilrn~ents will be approximately <br />9 feet in height and have a 10-foot crest width. The principal <br />spillway for the sedimentation ponds is a 36-inch diameter CMP riser <br />pipe which leads to a 30-ind~ diameter CMP outlet, The riser pipe is <br /> <br />