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data chow that 6 to 15 inches of topsoil, underlain with chemically and physically suitable <br />i spoil material will be cuff iclent to: 1) eatabl ish a proper seedbed and a rooting medium; <br />and 21 achieve a compatible rela tionehip between production, diversity and plant community <br />composition. Seneca has also recently implemented a study to determine whether a reduction <br />in topsoil depth application will temporarily inhibit grass establishment while favoring <br />shrub establishment. Seneca will continue to salvage, store, and replace soil as described <br />and approved in Permit C-80-005. <br />Aevegetation <br />Seeding and Shrub Planting. Permanent ravage Cation activities in 1995 included planting <br />and seeding of shrubs ae described below, and drill seeding with permanent Seed Mix #1 (see <br />Table 95.3). 10.9 acres were seeded during September 1995 with the permanent mix using a <br />modified Rangeland type drill. A total of 9,600 shrub seedlings were planted in 7 <br />concentrated planting areas in 1995 (see Exhibit 95.4a, Shrub plots). Table 95.2, liars <br />planting areas, approximate acreages, species composition of each area, and the total <br />numbers planted by species Eor each area. All plant materials were one-year-old <br />containerized nursery stock developed from chokecherry (Prunus virginlanal, serviceberry <br />(Amelanchler alnifolia), and Gambel oak (Quercus gambelii) seed collected from the Seneca <br />II mine site. The aeedl ings ware grown and planted by Bitterroot Native Growers, Inc. <br />(HNG) of Hamilton, Montana. Deer-Away browse repellent was placed on all planted <br />seedlings. All aeedl ings were treated with a mycorrhizal fungi inoculum that was developed <br />at the BNG nursery. The source of the mycorrhizal inoculum was From soil collected in <br />native mountain brush stands at the senate II Mine. Plantings were completed in late <br />September 1995 in reclaimed sites which were dieted several times during the growing season <br />[o control established herbaceous vegetation and prepare the site for planting. The heavy <br />dieting created numerous planting microsi tee. In addition, the Bites received pre-emergent <br />herbicide treatments of 4 oz. OUST per acre to control annual weeds. <br />Weed Control <br />Survey for noxious Weeds was carried out on the 98neca II Mine permit area in 1995. Areas <br />where weed control was required are shown on Exhibit 95.5. Because the 1995 weed control <br />activities included some small scattered spot control areas, all Bites which were sprayed <br />may not be shown. Monitoring was conducted in 1995 to determine the need or level of <br />ratrea[ment necessary £or areas sprayed in 1994. Canada thistle (C ixsium arvense) was [he <br />primary target species in all control areas, with lesser activity direc Bed cowards areas of <br />whi to top (Cardaria drabal. The applied herbicide consisted of a tank mix of 2.5 gallons of <br />5 <br />