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s <br /> <br />- - o Underground coal waste constructed in lifts and compacted to <br />- - 908 Standard Proctor density at a slope of 25 degrees from <br />the toe to within 4 feet of the top of the slope. <br />0 30 feet high, 60 feet wide berm constructed of coal waste at <br />_ the toe of the slope. <br />- - 0 4 foot depth of recompacted overburden fill material placed <br />' over the coal waste. <br /> 0 10 feet high, 20 feet wide rock berm. <br />~ NORT HERN SECTION <br /> o Only partial excavation of toe area and replacement with <br />I <br />- recompacted fill material. <br />I o Underground coal waste constructed at a slope of 25 degrees <br /> <br />• from the toe to within 4 feet of the top of slope. <br /> 0 4 foot depth of recompacted overburden fill material placed <br /> over the coal waste. <br />- 0 30 feet high, 100 feet wide berm constructed of recompacted <br />' existing bench fill material. <br /> <br />' o <br />GO I No rock berm. <br />N C <br />TON <br /> T <br />o . T <br />H <br />Excavation of toe area. <br /> o Replacement of excavated toe area with select sand and <br /> gravel material meeting design requirements. <br /> <br />• o Lower 30 feet of slope area to be constructed of recompacted <br /> existing bench fill material. <br /> o Underground coal waste constructed at 25 degrees from within <br /> 4 feet of the top of the slope to within 30 feet of the toe. <br />' 0 4 foot depth of recompacted overburden fill material placed <br /> over the coal waste. <br /> <br />21 <br /> <br />