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r~ , <br />i <br /> <br />Page 2 <br />Rick Mi115 <br />Flay 22, 1980 <br /> <br />reclaimed slopes. As I indicated to Energy Fuel's personnel <br />during our site examination, if this information determines <br />that a possible problem could exist, then a more sop'+isticeted <br />groundwater hydrology and slope stability analysis may be <br />required. <br /> <br />2) I am concerned about the steep slope situation throughout approximately <br />the northeastern most one thousand feet of the reclaimed pit. The natural <br />slope in this area obviously exceeded 20°, and evidence exists of instability <br />within the ungraded spoil in that area. I believe that the reclaimed spoil <br />will not be capable of sustaining the original slope angle without particular <br />care in compaction and surface drainage. I believe we should pursue reclamation <br />at as low a slope angle as practical, allowing variation from approximate <br />original contour in this specific area. Extension of the toe of the <br />reclaimed slope towards the natural drainage course would still be necessary <br />in order to lower the overall average reclaimed slope angle. The slope could <br />be blended into the natural slope contours at the northeastern boundary if <br />some ingenuity is exercised by Energy Fuels. This should result in a drainage <br />channel at or near the northeastern boundary which Jerry Zimpfer should <br />carefully review for its design specifics. In order to thoroughly analyze <br />this situation, we should also have a cross section prepared and submitted <br />by Energy Fuels at a location several hundred Feet southwest of the northeastern <br />edge of the mine pit. This section should extend from slightly northeast <br />of the natural drainage to slightly above the low wall upslope boundary <br />of the pit. This cross section should also include the bottom elevations <br />of the pit, the original ground surface, and the proposed final reclaimed <br />surface. <br />Jim Pendleton <br />/k <br />