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TAB 9 <br />ATTACHMENT 9-5 <br />SENECA II 008 SEDIMENT POND <br />Soil Type Identification <br />The soils identified within the 008 sediment pond permit extension area <br />were mapped to an order 2/3 level by the USDA Soil Conservation Service <br />(SCS), Craig Field Office in 1977 and 1979. Ttie SCS soil survey was <br />utilized to delineate the soil types within the 008 sediment pond per~nit <br />extension area. Soil map unit lines were transferred from the SCS <br />1:24,000 black and white aerial photographs (dated February 1979) to the <br />1:4,800 topographic base map, Exhibit 9-1 (Soil Types and 5aniple <br />Locations), by utilizing a magnification stereoscope and 1:24,000 black <br />and white aerial photographs (dated 10/10/86). Soil map units and <br />boundary lines were joined with the adjacent survey conducted by Claude <br />Fly and Associates. No onsite field checks ur soil sanipliny was <br />utilized to confirm the SCS soil snap unit types or boundaries. <br />The soil map units identified within the 008 sediment pond pzrmiC <br />extension area are similar to the types previously identified on the <br />adjacent Seneca lI Mine permit area. Soil map units which occur on the <br />proposed .permit extension area include 2V-Routt loans, <br />XS-Winevada/Splitro looms, 10-Binco clay, 35-Aaberg silty clay, <br />66-Skylick loam, 99-Cryoborolls/Rockland Association, AW-A1luviun~, <br />RL-Rockland and W-Water. A detailed discussion of each type, except <br />Routt clay loam, is contained in Permit C-005-80, Tab 9, Soil Survey of <br />Seneca II f4ine. <br />Routt loans soils are deep (40 to 60 inches) and occupy small bench and <br />lower sideslope landscape positio ns. They have formed in culluviuin and <br />residuum derived dominantly front fine-grained sandstone and shalt. The <br />SCS series and map unit descriptions for Routc luain are presented uri <br />pages 9-49 through 9-52. <br />9-45 kevised 03/''6/87 <br />