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~ 5 ~ Alternative Reclamation Plan i~i SFIB AGRA Project E92-7075 Page 9 1 Seedbed Preparation ' Areas to be seeded will be ripped following topsoil placement to a depth of 18 inches to relieve subsoil compaction caused by heavy machinery traffic. Areas to be seeded will be cultipacked; ' if necessary, they will be disced to reduce clod size. If ready during the period of April 1 to October 1, the appropriate cover crop will be sown (see Mulching below). If outside that time range, 2 tons/acre of clean long-fiber straw will be spread and crimped into the surface. ' Seed Mixes ' Listed in Tables E-1 and E-2 are planting specifications for the two post-reclamation vegetation types. In these tables, rates of application of Pure Live Seed (PLS)/acre are shown. Plant communities to be created during reclamation include the following: • Grassland (Table E-1) -This type is planned for the bulk of the reclaimed mine area. The result will be a grassland of predominantly native grasses and forbs that approximates what may have occupied Dowe Flats before settlement and ' massive agricultural disturbance. This mix will be applied to all areas of final reclamation, including the visual screen, but excepting [he wetland area. Topsoil depth will be 4 to 8 inches. ' • Wetland (Table E-2) -This community will be established in a low area in the northeast portion of the mined area that will be wetted by ground water seepage and capillary rise from the water table. Topsoil depth will 4 to 8 inches. ' Seeding Methods Drill seeding will be used in all grassland area seeding and will be oriented on the contour. The ' seed drill will be a "Grassland" type drill with at least two seed boxes, one of which will have picker wheels, or other means of handling fluffy seed. It will be equipped with double disk ' furrow openers, depth bands set at 1/4 to 1/2 inch, and packer wheels or drag chains. During planting, the legume, smooth, or small seed box will be filled with the aggressive cool season species indicated in the Plant Material Mixes (Tables E-1 and E-2) and every second and third ' drop tube out of this box will be blocked so that these aggressive species are placed only in every third furrow; thus, in two furrows of each three, the less aggressive cool season grasses, as well as the warm season grasses and the forbs (and shrubs, where applicable) will be planted alone. This will allow these less aggressive species to develop without the often fatal direct competition of more aggressive cool season grasses. (Note that these listed mixes do not include 1 L, A G R A ' Earth & Environmental Group