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COLORADO <br /> # Dry mton ai W-c".amation. <br /> Mining and Satety <br /> Task #•002.1 Highwall Backfill Volume Estimate <br /> PROJECT: Thomas Gravel Pit DATE: 2 21 2020 <br /> PERMIT No.: M-1981-286 LEGEND <br /> HIGHWALL LOCATION: Pit Permiter Estimate k1put <br /> Highwall Length = 1.0=ift <br /> Backfill Volume per unit <br /> Length = 145 ft2 <br /> 0.1! <br /> Total Backfill Vol. = 145,000 ft 3 <br /> Estimated 1.0 OR 5,370 CY <br /> Average <br /> Highwall <br /> Reclaimed Grade <br /> Height= 10 ft Existing or ;slope length <br /> ------- Mined --- -- <br /> Slope surface <br /> Grade 1.0 area 31,623 ftZ <br /> OR 0.73 Acres <br /> 29 ft <br /> HIGHWALL BACKFILL VOLUME ESTIMATE <br /> C:\Users\ECS\Desktop\Copy of HighwallBackfillCalculatorV2a.xlsx H Highwall Backfill-Pushup <br />