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Haul Road /County Road 65 Topsoil Stockpile: <br />This topsoil stockpile is stable but has a Cheatgrass problem, primarily on the south side. <br />Perennial vegetation includes Crested, Intermediate, and Western wheatgrass, Russian <br />wildrye, and Smooth brome (Bromus rnermis). <br />Recommendations <br />Species and growth form diversity are lacking in most of the revegetated sites. This appears <br />to be caused by two factors; 1) inappropriate seed mixes and 2) excessive competition from <br />weedy and seeded species. Much more diverse seed mixes have been proposed in the permit <br />renewal submitted in January 1999. In addition, site specific variations in seed mix placement <br />may need to be incorporated which would allow shrub and forb species to establish away <br />from the competition of aggressive perennial grasses. <br />On laydown areas with limited diversity several approaches may be appropriate. Before hasty <br />judgements are made one must keep in mind that these areas are currently in stable, <br />productive states. They are all small enough to where additions of other life forms would not <br />provide added ecological value beyond achieving numeric criteria in Deserado's permit. In <br />their current state they increase the diversity of the entire ecosystem when taken in context <br />with the adjacent shrublands. This aside, the numeric criteria will someday have to be met for <br />closure. <br />The first approach is to allow natural successional changes to run their course to obtain the <br />desired diversity criteria. This appears appropriate for several of the laydown areas where <br />shrubs and fortis have begun to encroach from adjacent undisturbed lands. <br /> <br />~, <br />Other sites may require limited control of existing vegetation and interseeding of alternate <br />species of the desired life forms. Strips of vegetation could be sprayed with Roundup or a <br />grass selective herbicide to eliminate the existing competition. Various selective mixes of the/ <br />desired species would then be seeded within these strips. <br />