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Highwall reduction - backfill <br />Highwall Height (ft.) <br />Length of Highwall (Ift.) <br />Initial Slope <br />Desired Slope <br />Volume of material to be moved (ft.) <br />Volume of material to be moved (yd.3) <br />All dimensions measured in feet <br />Drawing not to scale <br />40 <br />600 <br />1 H: 1V <br />2 H: 1V <br />480,000 <br />17,778 <br />I <br />I <br />40 <br />800 ft.Z <br />I <br />80 40 <br />80