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Exhibi! J - <br />Table J-2 Vegetative Communities within the Expansion Area South <br /> Dominant Species <br />,hype Common Name Scientific Name Acres Percent <br /> Cover <br />Wetlands arrowleaf cottonwood, Populus angustifolia, Salix exigua, 3 10 <br />Riparian sandbar willow, spotted Centaurea maculosq Aristida <br />(wooded with knapweed, purple three- urpurea <br />weedy awn <br />understory) <br />Saltgrass Draw Inland saltgrass Distichlis spicata 2 7 <br />Prairie dog lixweed, blue mustard, escurainio sophiq Chorispora 16 55 <br />complex red-stem fillaree, prickly tenellq Erodium cicutarium, <br /> pear cactus O untia o[yacantha <br />Bare Ground o vegetation No vegetation 8.3 28 <br />Total 29.3 100 <br />Old Riparian <br />There is one large area dominated by plains cottonwood with a willow understory. This area is <br />within the historic meander of the river but is now completely dry, with remnant wetland species. <br />Sand and gravel constitutes the substrate and early successional weed species are abundant <br />throughout the site. Spotted Imapweed and scotch thistle are found throughout the area. Reed <br />canarygrass and purple threeawn are found in isolated areas. <br />Sandy Slope <br />This area is a single hill, possibly an old topsoil stockpile. The soil is almost entirely comprised <br />mostly of sand. The area is dominated by hairy false goldenaster, silver sagebrush, and purple <br />threeawn. Spotted knapweed is also common in the area. <br />Wooded with Weedy Understory <br />In the Expansion Area North this vegetative community was previously a frequently inundated <br />plains cottonwood stand with a willow understory. However, currently the soils are dry and <br />sandy. The area no longer has sufficient moisture, and the willows are dying out, with little to no <br />cottonwood recruitment. Spotted knapweed is common throughout the area. In the Expansion <br />Area South this community occurs in three areas, one at the northern boundazy between the <br />Expansion Area North and the Expansion Area South, one near the eastern edge by Brighton <br />Road, and one in the southwest corner just outside of the proposed mine expansion area. <br />Grass Forb Mix <br />This vegetation Type comprises most of the central part of the Expansion Area. The soil in the <br />area is sandy. This area is dominated by purple threeawn, spotted knapweed, and goosefoot. <br />Spotted knapweed and goosefoot are weeds; however, purple threeawn is not a weed. Many <br />1898•Frei l12 Exhibits_(4.20.05).doc .l-3 <br />