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Colowyo Coal Company <br />2018 Annual Reclamation and Hydrology Report <br />Figure 5-3 — Overall Topsoil Balance for Report Year <br />1 Disturbed Lands <br />(See Annual Report Information) <br />2 Lands with Redistributed Topsoil <br />(See Annual Report Information) <br />3 Lands Yet to be Retopsoiled (Line 1 M inus 2) <br />4 Lands Yet to be Retopsoiled <br />5 Volume of Topsoil in Stockpiles <br />(from Figure 7-1) <br />6 Line 5 times 27 <br />7 Average Replacement Depth Available <br />(Line 6 divided by Line 4) <br />8 Average Replacement Depth Available <br />4,360.8 acres' <br />1,320.8 acres' <br />3,040.0 acres <br />132,422,000.0 sq. feet <br />5,064,618.1 cu. yards' <br />136,745,000.0 cu. ft <br />1.0 feet <br />12.4 inches <br />All Phase III released acres have been removed. <br />Note: Values presented above represent an estimate of areas and volumes as of the date shown above. <br />Stockpile inventories change frequently as mining plans vary. <br />Page 31 <br />