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Pit 3 <br />Pit 3 is the southernmost or furthest upstream of the five pits. Soils in areas to be disturbed are <br />all Green River series formed in alluvium derived from sedimentary, metamorphic and igneous <br />rock. This series is found in floodplains and terraces where Pit 3 is located. Data for annual dry <br />weight production of the vegetation supported by this series is not available. <br />Table 4. Gunnison River Gravel Pits #3 Soils, Ecological Site and Plant Composition <br />RCS 2009 .. <br />Map unit <br />symbol and <br />soil name Ecological <br />site Total dry-weight annual production <br />Ibs/acre/yr Characteristic <br />vegetation Rangeland <br />composition <br />% total <br /> Favorable Normal Unfavorable <br />39-Green River silt loam, 0 to 2 percent slopes <br />Green River -- -- -- -- Redto - <br /> -- -- -- -- Skunkbush sumac - <br /> -- -- -- -- Cottonwood - <br /> -- -- -- -- Willow - <br /> -- -- -- -- Inland salt grass - <br /> -- -- -- -- Alkalai sacaton - <br />As with other pit sites, this site has been altered. Woody vegetation was stripped and topsoil was <br />disturbed. No grasses or forbs or their senescent parts were observed. Low shrubs dominate the <br />vegetation community. An early seral shrub stage composed of three species of rabbitbrush <br />dominated by rubber rabbitbrush. Density of shrubs is approximately <br />Pit 4 <br />Less two acres of Pit 4 has been previously mined, apparently for road base for the access road <br />along the river. Mapping by NRCS did not show the pre-dominant soil - Green River series <br />identical to that described in Table 4. above more detail. Xeric soils are deep west of the <br />proposed mined area. <br />{1UIlIlitiOf) RltCl' l_il'zilti i ?'!? 6 ?i)I( and Vcu'CL16P)n