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site in the past, assure that the refuse disposal embanl~eat will <br />be constructed sad reclaimed properly sad eliminate the concerns <br />i <br />which led to the Division's imposition of atipulationa on the <br />1983 refuse facility revision submitted by the previous operator. <br />Following is a detailed description oP the newly revised refuse <br />disposal azea design which has been prepazed by Energy Fuels <br />!lining Company. <br />1. Size and Coafi¢uration: The volume of the revised refuse <br />disposal embaal®ent is approximately 1.3 million cubic yazde. <br />Although current projections indicate that the total volume <br />of refuse volume necessary ie only 885,000 cubic yazda, this <br />design provides antra capacity !or additional reserves which <br />may be found wlthin the mine azea, a lower clean coal yield <br />than projected and/or disposal of sediment collected in <br />drainage control facilities. The area covered by the refuse <br />disposal facility will be 18.58 acres maximum and the overall <br />height will be ao greater than 145 feet. The aide slopes of <br />the refuse disposal embanl~ent will be 3 horizontal to 1 <br />vertical and will be uniform elopes rather than terraced as <br />in previous designs. <br />4~ •1 <br />+- ,.~ 1 1 <br />., <br />2. Draiaa¢e: As with both previous designs, all upstream <br />drainage will be diverted away from the reluae facility. <br />Drainage diversion ditches were properly installed by the <br />previous operator up gradient Prom the pile ae initially <br />designed. Because the revised refuse dispose! area design <br />contained herein is nearly identical in size sad shape to <br />that originally proposed, ao modification to the diversion <br />ditches which are currently is place is aeceaeazy to accommo- <br />date this revision. All drainage generated i;om the refuse <br />diepoeal site will be directed to the sedimentation pond <br />located went o! the refuse embaalaneat. In previous designs, <br />all drainage generated on the refuse diepoeal site was <br />collected via terraces and perimeter ditches, which tended to <br />concentrate runoff is small areas and create severe erosion, <br />dowacutting and sediment deposition downstream. This design <br />467 <br />Revised 1/88 <br />