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This unit passes a majority of the proposed revegetation success criteria with two exceptions (Table <br />1): no warm-season grasses were intercepted during sampling (proposed standard > 0.5% composition) <br />and only one species was observed in the unit (proposed standard is 2). Qualitative analysis indicates <br />the revegetation at the Roadside North Portal Facilities - Shadscale is in average condition overall. This <br />area exhibits a diverse shrub population, with most individuals appearing robust and healthy. There is <br />little diversity of grasses in the understory due to the prevalence of cheatgrass. <br />3.12 Roadside Refuse Borrow Area <br />Ground cover of the Roadside Refuse Borrow Area consisted of 27.9% live vegetation, 4.1% rock, <br />13.1% litter, and bare ground exposure of 54.9% (Table 3b). Perennial cover across the unit averaged <br />12.8% (up from 8.4% in 2008) with annual and biennial cover averaging 14.8% (down from 25.7% in <br />2008). Dominant taxa were cheatgrass, forage kochia, rubber rabbitbrush, and shadscale with 12.8%, <br />3.0%, 2.9%, and 2.8% average cover, respectively. Current annual herbaceous production in the <br />Roadside Refuse Borrow Area totaled 263 pounds per acre, with perennials contributing 140 pounds to <br />forage production (Table 5b). Woody plant density averaged 761 shrubs per acre comprised mostly of <br />shadscale with lesser amounts of fourwing saltbush, rubber rabbitbrush, and greasewood scattered <br />throughout the unit (Table 6b). <br />This unit passes a majority of the proposed revegetation success criteria with three exceptions <br />(Table 1): only one warm-season grass was observed in the unit, the total herbaceous production was <br />below 90% of the Shadscale Reference Area value of 558 pounds per acre and the unit falls just short of <br />the woody plant density standard of 800 live stems per acre. Qualitative analysis indicates that the <br />Roadside Refuse Borrow area is in average but improving condition overall. The noxious species <br />bindweed (Convo/vu/us arvensis) was observed within this unit. <br />3.13 Roadside Refuse Disposal Area <br />Ground cover of the Roadside RDA consisted of 44.3% live vegetation, 2.8% rock, 18.1% litter, and <br />bare ground exposure of 34.8% (Table 3b). Perennial cover across the unit averaged 28.4% (up from <br />27.7% in 2008) with annual and biennial cover averaging 15.9% (down from 29.1% in 2008). Dominant <br />taxa were forage kochia, cheatgrass and greasewood with 25.6%, 15.8%, and 1.9% average cover, <br />respectively. Current annual herbaceous production in the Roadside RDA totaled 707 pounds per acre, <br />with the perennials contributing 580 pounds to forage production (Table 5b). Woody plant density <br />averaged 1,331 shrubs per acre comprised mostly of greasewood with lesser amounts of shadscale and <br />fourwing saltbush scattered throughout the unit (Table 6b). <br />CEDAR CREEK ASSOCIATES, Inc. Page 23 Snowcap - Revegetation Evaluation - 2010