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The filter cloth should then overlap the rock as shown <br />1 on Figure 6. <br />7 Once the rock and filter cloth are in place, the coal refuse <br />J material should be end dumped over the drain to a minimum depth <br />of 2 feet and spread with a small dozer, keeping the blade high <br />l so that the refuse material is being dropped on, not shoved over <br />1 the filter cloth to prevent damage to the cloth. Once the 2 foot <br />layer is obtained, the refuse material should be compacted to the <br />required moisture density specifications. <br />Refuse should be disposed to the lines and grades shown on the <br />drawings. Control for placement can be established from the <br />control points provided on Figure 1. <br />Run-of-plant coarse refuse and fine refuse from the belt-press <br />operations should be mixed in a ratio of 3 coarse (or greater) <br />to 1 fine and used for construction of the pile. <br />The refuse mixture should be spread in horizontal lifts not more <br />than 3 feet thick using a bulldozer or other earth moving <br />equipment. <br />The refuse mixture should be placed in the central portion of the <br />1 fill area away from the slopes during wet weather or when <br />drainage is insufficient and near the outside slopes during drier <br />' periods. <br />' The refuse should be spread in layers having an uncompacted <br />thickness of less than 3 feet. The material should be compacted <br />12 <br />