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-5- <br />• <br />presents a stability analysis of the proposed eastern extension of the <br />Energy Fuels Mine. <br />There is a short section estimated to be in the range of 800 feet <br />long between Sta. 10 and Sta. 20 of Haul Road 'D', where the haul road <br />will cross an area of relatively soft foundation soils. Foundation <br />conditions in this area consist of a relatively thin veneer of soft to <br />medium stiff clays over the sedimentary bedrock. Foundation conditions <br />in this area were investigated in detail for the proposed sediment dam. <br />The detailed description of the soils and foundation conditions as well <br />as the strength properties and other pertinent conditions are presented <br />in the companion report entitled "Sedimentation Pond, Geotechnical In- <br />vestigation", Job No. 5664A, dated September 11, 1979, by CTL/Thompson, <br />• Inc. The soft layer will consolidate under the load of the fill and <br />there is a possibility of shear failure of the thin layer of relatively <br />compressible soils. The results of our stability analysis of the haul <br />roads and estimates of settlements are presented in other portions of <br />this report. <br />MATERIAL PROPERTIES <br />Several samples of the potential fill materials to be used in con- <br />struction of haul roads were obtained in sufficient quantities to conduct <br />Proctor compaction tests and California Bearing Ratio tests. A sample of <br />the upper brown sandy clays was obtained south of an existing haul road <br />near the existing Energy Fuels Mine office. This sample had 95 percent <br />• passing the No. 200 sieve, 5 percent sand sizes, a liquid limit of 32 <br />