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Highwall reduction - backfill <br />Highwall Height (ft.) 23 <br />Length of Highwall (Ift.) 2400 <br />- - - - Initial Slope 0.5 H: IV <br />Desired Slope 3 H: IV <br />Volume of material to be moved (ft. 3) 1,518,750 <br />Volume of material to be moved (yd.3) 56,250 <br />All dimensions measured in feet <br />Drawing not to scale <br />I <br />I <br />I <br />22.5 <br />I <br />633 ft.2 <br />I <br />45 11.25 <br />67.5