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Highwall reduction - backfill <br />Highwall Height (ft.) 20.0 <br />Length of Highwall (Ift.) 3100 <br />- - - - Initial Slope 1.0 H:1V <br />?- Desired Slope 3 H: IV <br />Volume of material to be moved (ft. 3) 1,240,000 <br />Volume of material to be moved (yd.3) 45,926 <br />All dimensions measured in feet <br />Drawing not to scale <br />I <br />I <br />I <br />20 <br />I <br />400 ft.2 <br />I <br />40 20 <br />60