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ERO Resouroes <br />• <br />12. pot{ <br />The soils mapped on the permit area haw bwn oatsgorized into four main <br />suitable depth classes. <br />1 Deep soils, deeper than 40 inches <br />2 MoWrately deep soils, 20 to 40 inches deep <br />3 Shallow soils, 10 to 20 inches deep <br />4 Rook outcrop, scattered rocky soils 1 to 20 inches deep, saline <br />and alkali soils <br />• <br />Most of the soils rated fair in terms of topsoil suitability throughout <br />their surface and subsoil horizons. Illustration C giros results of the <br />laboratory analyses. <br />Areas with e~osed rock or soils too shallow (often flaggy or channery) to <br />be of practical use for topsoil removal and reclamation were decignated as <br />rock outcrop. <br />a. TOPSOIL SUITABILITY CIASSIFICATION <br />• <br />The soils aeries and series variants haw been classified from 1 to 4. <br />Class 1 represents soil material with fair to good topsoil suitability to <br />a depth of more than 40 inches. Class 2 includes moderately deep soil <br />materials with 20 tc 40 inches of fair to good topsoil. Class 3 contains <br />soil materials with fair to good topsoil suitability to a depth of 10 to <br />20 inches. Class 4 represents land types and soils unsuitable for topsoil <br />material. There ere no Class 1 soils in the B Portal area due to the <br />steep slopes which prohibit formation of deep soils. <br />A discussion of topsoil suitability by class is provided for each soil <br />series or series variarrt. The mapping units contain various slope and <br />erosion phases as well as oog7lexes or associations of soil caries phases <br />and phases of series variants. These mapping units are classified in <br />II,I- 7 <br />