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g <br />Plant Community <br />r ; <br />Topographical Position <br />w <br />c Description <br />Percent <br />of <br />lase < <br />Herbaceous <br />Production£t <br />(lbslacre) <br />V <br />n�s <br />Wetland drainage <br />bottoms <br />Streamside and <br />bottomland <br />Mixture of many upland plant <br />communities occurring on deeper <br />soils; occasional patches of <br />boxelder <br />3 <br />1,513 <br />63 <br />Sagebrush <br />Occurs on lower slopes on <br />xeric (south and west <br />exposures) and mesic <br />(north and east exposures) <br />sites <br />Basin big sagebrush occurs on <br />bottomland with deep soils, <br />mountain big sagebrush occurs on <br />xeric and mesic sites; sagebrush <br />density is greater on mesic than <br />xeric sties; mesic sagebrush is <br />over mature and decadent <br />31 <br />928 <br />67 <br />Aspen <br />Steep, north facing slopes <br />Aspen pockets are mostly <br />decadent trees with mortality up to <br />50 percent <br />2 <br />1,248 <br />75 <br />Mountain shrub <br />Occurs on upper slopes on <br />xeric (south and west <br />exposures) and mesic <br />(north and east exposures) <br />sites <br />Oakbrush characterizes the mesic <br />sites, while serviceberry dominates <br />on xeric sites <br />63 <br />774 <br />67 <br />Juniper scrub <br />Occurs at northern part of <br />lease area <br />Rocky mountain and Utah junipers <br />grow on eroded, shallow soils <br />< 1 <br />213 <br />35 <br />Grasslands <br />Native grasses occur as <br />pockets on sandy soils <br />Grasses are found where chaining <br />and burning have occurred <br />< 1 <br />1,008 <br />59 <br />Improved <br />grasslands <br />Bottomlands and higher <br />elevations <br />Crested wheatgrass occurs on <br />improved bottomlands, smooth <br />brome occurs on high elevation <br />improved land. <br />< 1 <br />1,475 <br />74 <br />Unit <br />Maximum <br />; (ft/day) <br />Minimum <br />(ft/day) <br />Geometric <br />Mean <br />(ft/day) <br />No. of <br />Data <br />Points <br />No. of <br />Wells <br />Fab seam <br />7.70E -01 <br />6.66E -03 <br />1.84E -01 <br />9 <br />6 <br />G seam <br />5.72E -01 <br />9.69E -02 <br />1.97E -01 <br />4 <br />4 <br />H sandstone <br />7.9E -03 <br />1.67E -04 <br />1.44E -03 <br />4 <br />4 <br />I sandstone <br />3.20E -02 <br />9.03E -04 <br />8.06E -03 <br />3 <br />3 <br />J seam <br />4.28E -04 <br />1 <br />1 <br />Trout Creek <br />Sandstone <br />8.9E -02 <br />5.80E -03 <br />2.06E -02 <br />6 <br />3 <br />1 <br />t <br />1 <br />1 <br />t <br />AU alsll <br />Environmental Scientists and Engineers, LLC <br />rom Table 5.7 in WMC (2005) <br />3.7 Vegetation Resources <br />P:'PROJECTS Cotowyo 088 EA Fin,IBLA4r -EA Convm nS OI .na a, <br />Table 6 Hydraulic Conductivities (continued) <br />3.7.1 Plant Communities <br />The current vegetation within the proposed lease area was surveyed (S. Viert, Cedar <br />Creek Associates, Inc., personal communication) to delineate various plant communities <br />(Figure 9, Table 6). Plant species composition, cover, and herbaceous productivity were <br />assessed. Species composition and a detailed map will be presented with the mine permit <br />environmental analysis, as on -going surveys may be necessary. Potential plant species <br />composition is presented in Section 3.5.1 as part of the soil mapping unit descriptions. <br />Table 7 Plant Communities on the Proposed Collom Lease Area <br />ersonal communication with S. Viert, Cedar Creek Associates, inc. Data are preliminary. <br />33 <br />