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Highwall Grading (2:1) <br /> rg <br /> w <br /> The Highwall is approximately 18 feet high (rise) at its tallest point. If the operator cuts from 18 feet behind the current highwall and uses that material as fill up <br /> to 18 feet in front of the current highwall's base (a total of 36 feet in run), they could achieve a 2:1 slope. The polygons shown are only representations of what <br /> this might look like when complete. <br />