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<br />S e~ ties Rate in lbs/acre <br />Western Wheatgrass 7 <br />Slender Wheatgrass 5 <br />Bluebunch Wheatgrass 6 <br />Indian Ricegrass 5 <br />The entire slope was mulched with excelsior mats (Photograph <br />111. Approximately 200 rabbitbrush and 100 snowberry native plant <br />shrub tubelings were planted m this slope in the fall 1979. <br />Management <br />This area is within the fence so there has been no grazing. <br />Additional fertilizer (30-10-0) was applied at the rate of 120 <br />lbs/acre in the spring of 1980 and 1981. <br />Results <br />Cover on the slope directly above the sediment ponds is 60-70 <br />percent; however, north of the ponds there is approximately 30 feet <br />of slope that has sloughed and there are very few surviving plants. <br />On the portion of the slope which was retopsoiled (north end) cover <br />averages 20-30 percent (Photograph 12). Seeded perennial species <br />evident m the slope are western wheatgrass, slender wheatgrass, and <br />Indian ricegrass. Fringed sage, leafy spurge, and golden corydalis, <br />are also present on the slope. None of the shrub tubelings are <br />evident. <br />Recommendations <br />Areas where this slope has sloughed should be reseeded. and <br />remulched to eventually stabilize this portion fo the slope. Cm - <br />tinual spring fertilization will enhance vegetative growth leading <br />to better ground cover. Interseeding sparse areas with species such <br />as Indian ricegrass and green needlegrass will also lead to the <br />development of more ground cover. <br />Diversion Ditch <br />Physical Characteristics <br />This diversion ditch was constructed in the summer of 1979 and <br />reseeded that fall. The ditch starts above the mine portal and the <br />lower end of the ditch curves down to the highway at the north end <br />of the parking lot. This ditch was cut into the hillside, resulting <br />in very steep upper and lower slopes and the floor of the ditch is <br />primarily a rocky substrate. <br />..~ <br />