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Highwall reduction - backfill <br />Highwall Height (ft.) 30 <br />Length of Highwall (Ift.) 4875 <br />- - - - Initial Slope 2 H: 1V <br />Desired Slope 3 H: 1V <br />Volume of material to be moved (ft.3) 2,193,750 <br />Volume of material to be moved (yd.3) 81,250 <br />All dimensions measured in feet <br />Drawing not to scale <br />I <br />I <br />/ 30 <br />I <br />450 ft.Z / <br />I <br />60 60 <br />90 <br />