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!� • SECTION 5 - HIGH, THIN (SLIVER) FILL <br /> GENERAL. High, thin fill on a mine bench was end-dumped on a steep <br /> slope below the mine bench or road. •The material for this <br /> fill was obtained from the mine bench excavation. The fill <br /> is very thin (sliver type) ; it does not comprise a struc- <br /> tural fill (the thickness is limited to several feet <br /> only) . It can rather be classified as a spoil deposit. It <br /> was dumped usually on a very steep natural slope formed <br /> either by outcrops of rocks or by occasional patches of <br /> colluvial soils or talus deposits. No preparation of <br /> foundations for the fill was performed. <br /> STABILITY AND OTHER PROBLEMS. The natural slopes below the fill are <br /> frequently steep (30 - 40 degrees) , locally steeper than <br /> angle of repose of the fill. The fill is spread in a very <br /> thin layer , which is marginally stable. Sloughing and <br /> erosion are the most important stability problems; there <br /> is no danger of a large-scale failure. Blocks of different <br /> sizes are frequently segregated with accumulations of <br /> large blocks at the toe of the fill . <br /> RECLAMATION CONCEPT: Minimize erosion and sloughing potential by <br /> • improving the surface drainage and preventing surface <br /> water from areas above the fill from entering the fill . <br /> Eliminate sharp fill crest . <br /> METHOD OF RECLAMATION: Construct diversion ditches above fill <br /> crest . Contour the fill crest to a rounded shape . <br /> ANALYTICAL CONSIDERATIONS: Analyze existing stability conditions. <br /> Evaluate surface water inflows into fill area and analyze <br /> the effects of surface water diversion. <br /> PROPOSED LOCATION: C-Road , STa 72+00 to 73+00 <br /> it - <br />