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PERMFILE119249
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PERMFILE119249
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Last modified
8/24/2016 10:14:59 PM
Creation date
11/25/2007 6:45:37 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981071
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Section_Exhibit Name
EXHIBIT 20 ROADS GEOTECHNICAL INVESTIGATIONS
Media Type
D
Archive
No
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-3- <br />• <br />conditions for a proposed sediment dam. The studies were conducted to <br />develop geotechnical design criteria and recommendations for facilities <br />planned as part of an extension of the Energy Fuels Mine. Twenty-five <br />borings were drilled in areas of proposed spoil disposal and sediment <br />structure construction. No borings were specifically located along haul <br />road alignments. Borings 5 through 14 which were drilled as part of the <br />spoil disposal investigations did occur along the proposed alignment of <br />Haul Road 'D'. In addition to data developed from borings associated <br />with the spoil and sedimentation dam studies, we made field density tests <br />in existing haul roads to evaluate the effectiveness of present compaction <br />procedures and an extensive investigation and analysis of the critical <br />properties of spoils from the existing mine was made in order to evaluate <br />• the performance characteristics of the spoil material when used to con- <br />struct haul roads. We anticipate most of the required fill for haul road <br />construction will come from initial box cuts in the mine area and will <br />be similar to spoil from the existing mine. The investigations and ma- <br />terial properties are presented in detail in the referenced reports. This <br />report includes the specific design criteria and assumptions are presented <br />with appropriate references for the material properties. <br />FOUNDATION CONDITIONS <br />The haul roads are primarily located along ridge lines. For the <br />majority of the alignments, the foundation conditions are very favorable <br />for haul road construction. Along the ridge lines, the foundation soils <br />• consist essentially of a thin layer of residual clays developed by in-place <br />
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