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• profile depths (if the entire profile was suitable) across the entire study area based on <br />numerous soil profile descriptions obtained for each soil type. <br />A one-lift soil handling operation is recommended for all soil map units within the <br />projected disturbance area. This method of topsoil removal is desirable within the East <br />Wad ge Extension area because the sails are either shallow (Splitro) to moderately deep <br />(Wineveda) and have minimal subsoil profile development (thick, organic-rich "A" horizons <br />directly overlie sandstone bedrock), landscape slopes are steep to excessive (equipment <br />mobility and efficiency is severely restricted), mixing will provide a more erosion <br />resistant and stable seed-bed surface (Skylick), and/or only the "A" horizon is <br />salvageable (Aaberg, Binco, Buckskin, Gapo, and Routt) due to excessive clay contents in <br />lower horizons. <br />These suitability evaluations, based on averages across the study area, were used for <br />topsoil volume determinations presented in Attachment 9-7. She number of profiles on <br />which these averages are based is noted in the Soil Profile descriptions range of <br />characteristics. The recommended topsoil salvage depths for each map unit are weighted <br />• averages of each major component of the map unit (those listed in the map unit name - for <br />both consociations and complexes) as well as major soil inclusions as presented within the <br />map units. <br />Results/Discussion <br />Soil Survey Maps. The distribution of each map unit on the Seneca II Mine East Wadge <br />Extension study area is provided on 1"=400' scale topographic base maps (dated 6-1-BO and <br />10-9-87) accompanying this report (Exhibit 9-1, sheet 1 of 2 and 2 of 2, respectively). <br />Map unit boundaries, soil observation sites, and typifying soil pedon sample locations for <br />the study area were transferred from the 1"=400' scale black and white aerial photo field <br />base map to the existing Seneca II Mine 1"=400'scale topo base soil map, Exhibit 9-1 <br />(Sheet 1 of 2). Previous SCS Order 2/3 map unit delineations within the Pond OOB study <br />area were revised as necessary. Exhibit 9-1, Sheet 2 of 2 is provided for the <br />northeastern part of the study area. <br />Typifying soil pedons (soil sample locations), as well as all 48 soil profile description <br />• locations are denoted on Exhibit 9-1. A Soil Profile Descriptions List is provided as <br />Table 9-6-3. The legend on the maps includes all map unit symbols, soil series <br />9-6-16 Revised 05/16/88 <br />