Laserfiche WebLink
v <br />• The major topsoil salvage limitations will be the saturated soil conditions associated <br />with map unit 238; the surface silty clay textures of map unit 25E; the subsurface clay <br />and silty clay textures of map units 2VD, 2VE, 12E, 238, and 25E; steep slopes; and <br />shallow to moderately deep sandstone bedrock associated with map units XBE and 53E. No <br />suitable topsoil is available to be salvaged from portions (i.e., about 304) of the poorly <br />drained 238 soil map unit. However, all suitable topsoil will be salvaged whenever <br />deeper, localized ground water conditions are encountered within this map unit during the <br />topsoil salvage operation. <br />The high ground water level would severely restrict the mobility of topsoil salvage <br />equipment. Second, considerable irrepairable physical damage would occur during the <br />handling of the saturated soil. A saturated soil has a very weak aggregate stability. <br />Consequently, soil structure would be destroyed by puddling and severe compaction would <br />occur during topsoil salvage, stockpiling, and replacement. The resultant large, dense <br />clods would be nearly impervious to root penetration. <br />Since many map units have moderate to high clay contents, topsoil salvage operations will <br />• occur when the soil profiles are not saturated. Localized inclusions of sandstone rock <br />outcrop and areas of high coarse fragment content will be avoided during topsoil salvage. <br />Steep slopes will increase topsoil losses slightly during brush clearing and topsoil <br />salvage. The mean topsoil salvage depths presented in Table 9-7-1 and Exhibit 9-1 have <br />been adjusted for all of the aforementioned limitations. <br />Topsoil Replacement <br />Salvaged topsoil will either be hauled directly to and redistributed on regraded spoil <br />areas or stockpiled at location L-L (Exhibit 12-1, Operations Plan). Approximately 1.6 <br />feet of suitable topsoil is available to be replaced within the East Wadge Extension area. <br />The current, approved topsoil replacement depth for Seneca II Mine is 1.0 feet (Attachment <br />9-4, Topsoil Balance). <br /> <br />9-7-9 Revised 05/16/88 <br />