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3.11 Roadside RD <br />Ground cover of the Roadside RDA consisted of 57.6% live vegetation, 2.1% rock, 10,5% litter, and <br />bare soil exposure of 29.8%. Perennial cover across the unit averaged 29.5% with annual and biennial <br />cover averaging 28.1%. Dominant taxa were cheatgrass, forage kochia, and greasewood with 26.9%, <br />21.4%, and 4,8% average cover, respectively. This unit passes the revegetation success criterion of <br />90% of the Shadscale Reference Area value when both annual and perennial cover values are combined. <br />It also passes when only perennial cover is compared. <br />The Roadside RDA currently passes three of the four diversity standards. There is sufficient cover of <br />perennial fortis or sub-shrubs and perennial cool-season grasses to pass the required minimum values, <br />and there are no planted species with greater than 70% relative cover. However, the present relative <br />cover of perennial warm-season grasses (0%) is insufficient to pass the required minimum value (2.0%). <br />3.12 Roadside South Portal Uooer Diversion Ditch <br />Ground cover of the Roadside South Portal Upper Diversion Ditch consisted of 42.6% live <br />vegetation, 11.8% rock, 16.6% litter, and bare soil exposure of 29.0%. Perennial cover across the unit <br />averaged 5.3% with annual and biennial cover averaging 37.3%. Dominant taxa were cheatgrass, <br />filaree (Erodium dcutarium), forage kochia, and Palmer penstemon with 32.1%, 4.2%, 2.0%, and 1.8% <br />average cover, respectively. This unit fails the revegetation success criterion of 90% of the Shadswle <br />Reference Area value when both annual and perennial cover values are combined. It also fails when only <br />perennial cover is compared. <br />The Roadside South PoRal Upper Diversion Ditch currently passes two of the four diversity <br />standards. There is sufficient cover of perennial fortis or sub-shrubs to pass the required minimum <br />values, and there are no planted species with greater than 70% relative cover. However, the present <br />relative cover of perennial warm-season grasses (0%) and perennial cool-season grasses (0%) is <br />insufficient to pass the required minimum value (2.0% and 0.5%, respectively). <br />.13 Cameo RDA No. 1- 2002 Seeding <br />Ground cover of the 2002 Seeding of the Cameo RDA No. 1 consisted of 39.8% live vegetation, <br />10.4% rock, 20.19'0 litter, and bare soil exposure of 29.7%. Perennial cover across the unit averaged <br />21.2% with annual and biennial cover averaging 18.6%. Dominant taxa were cheatgrass, fourwing <br />CEDAR CREEK ASSOCIATES, INC. Page 18 SNOWCAP COAL COMPANY <br />Revegetation Evaluation - 2006 <br />