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.a~~' <br />~ ~ Plans _for sampling .overburden and `topsoil -to'identrfy pbtentially deleterious materials- have- been- <br />.,:.- - <br />"= ". ~: developed'arid~:are -outlined in"Tib' 29' (Minesbil Recbn5fructidnl. As previously mentioned, <br />~°Y_ <br />investigations-have determined that no-acid or toxic materials-will~be~replaced in the-rooting zone (Tab <br />6, Geology). Surface runoff from~reclaimedareas'will not come intd dohtact with materials that would <br />contribute to' elevated levels of acid or toxic constituents in the runoff.' <br />Topsoil handling procedures (Tab 21, Minesoil Reconstruction) and revegetation methods (Tab 22, <br />Revegetation Planl have bean developed to prevent erosion and~ininimize-theadditional contribution of <br />sediment to runoff. Plans presented in both Tabs include the establishment of topsoil piles, temporary <br />seeding of topsoil piles, disking, mulching, chisel plowing and prompt reseeding of reclaimed areas. <br />The Surface- Water Control Plans developed for Seneca II-W (see Exhibit 13-2, Tab 13, Facilities) <br />include tour temporary diversidns designed according to accepted engineering design criteria. They will <br />be built to minimize erosion and prevent additional contributions of sediment by limiting flow velocities <br />and tractive forces that cause excessive erosion. All temporary diversions will be removed and <br />reclaimed after mining has been completed. Culverts presented in the Surface bVater Control Plans for <br />both mining areas have been designed to feature adequate freebdarG andoutfall protection (riprapl, if <br />needed, to minimize erosioh. - - <br />~t Surface Water Quantity. Sediment ponds, diversions and culverts-have been planned and located-to <br />control all drainage into, through and out of the Seneca II-W Mine, and to insure that changes in <br />surface water quantity are minimized (see Exhibit 13-2 and 13-2A, Tab 13, Facilities). <br />Postmining topographies are planned to approximate the original premining contours Isee Tab 20, <br />Backfilling and Gradingl~ Replaced topsoil material should exhibit infiltration rates exceeding that of <br />premining soils. Reclamation techniques used in the Yopsoiled areas (select disking, mulching, and deep <br />ripping), in combination with reestablished watershed topographies will minimize excessive rates and <br />volumes of runoff. <br />Stream Buffer Zones. Sections on stream buffer zones in and adjacent to the Seneca II-W mining area <br />are included-in the permit revision application and can be found in Tab 13, Facilities and Tab 16, <br />Protection of the Hydrologic Balance. A pdrtion of the tie-across <br /> <br />...,r . ~*x~. ~ ~,_~-:. _ - 3 - _ -~ - - Rgvised 9%98 <br />