Laserfiche WebLink
shallow to shallow bedrock (Aaberg variant, Cryoborolls, Lymanson, Roxal variant, Rock <br />• Outcrop, Starman, Splitro variant, and Ustic Torriorthentsl. <br />A significant landscape feature which may influence topsoil salvage is the excessive slopes <br />associated with Map Units XSF, 34F, 53F, 66F, 99, 101, 103, and 5103. Topsoil salvage is <br />recommended within these map units provided the salvaged topsoil is suitable (see Table 9-21, <br />the rock fragment content is less than 35 percent, and the equipment can be operated safely. <br />Topsoil handling is discussed in more detail in Tab 21, Minesoil Reconstruction. <br />A one-lift soil handling operation is recommended for all soil map units within the projected <br />disturbance area. This method of topsoil removal is desirable within the study area because <br />the soils are either shallow ISplitrol to moderately deep IWinevedal and have minimal subsoil <br />profile development (thick, organic-rich "A" horizons directly overlie sandstone bedrock), <br />landscape slopes are steep to excessive lequipment mobility end efficiency is severely <br />restrictedl, mixing will provide a more erosion resistant and stable seed-bed surface ISkylickl, <br />and/or only the "A" horizon is salvageable (Aaberg, Binco, Buckskin, Gapo, and Routtl due to <br />excessive clay contents in lower horizons. <br />These suitability evaluations, based on averages across the study area, were used for topsoil <br />volume determinations presented in Tab 21, Minesoil Reconstruction of this PAP. The number <br />of profiles on 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 both <br />consociations and complexes) as well as major soil inclusions as presented within the map <br />units. <br />• <br />27 Revised 9/98 <br />