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• The Spicerton soil is limited by high SAR levels. Two <br />sampling locations (2 and 2A, Figure lE and Table 2E) substanti- <br />ate this fact. From 12 to 60 inches (sample site 2) and 18 to 60 <br />inches (sample site 2A) the SAR ranges from 21.3 to 33.8. SAR <br />values exceeding 15 indicate that establishment of vegetation <br />under these conditions would be severely restricted. Therefore, <br />Wyoming Fuel Company will limit stripping soil to 1 foot in this <br />mapping unit. Limiting stripping to a depth of 1 foot as indi- <br />cated by sampling site 2 should insure a minimal amount of soil <br />having high SAR and high clay be salvaged. <br />The Manburn soil is a shallow soil (<20 inches to weathered <br />sandstone). Wyoming Fuel Company sampled this weathered sand- <br />stone in 1980 and based on the type location (sample site 20, <br />Figure lE) found this material could be used a source of topsoil <br />if necessary. However, based on present calculations of topsoil <br />volume this will not be necessary. Present estimates indicate <br />• there is sufficient topsoil available to spread 18 to 24 inches <br />over reclaimed land. Therefore, Wyoming Fuel will limit strip- <br />ping the Manburn soil to a depth of 1.25 feet, or to the weath- <br />ered sandstone layer. <br />Redistribution of Topsoil <br />Topsoil was redistributed over all areas affected by mining <br />activities. As originally proposed, mining operations were to <br />disturb a total of 123.9 acres (Figure 2). The total available <br />topsoil would have been 223.4 acre feet (Figure lE). Approxi- <br />mately 173.5 acre feet of this amount was to be stripped from <br />Pit 2. Based on these estimates there was sufficient topsoil <br />available to cover the entire 123.9 acres to a depth of 22 <br />inches. <br />• -19- (Revised April 13, 1990) <br />