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• <br />A.'.EA DESCR:pTION <br />RRSLZTS r1h~ DZSC[;SSIO.i <br />The ;;ucla wildlife study area encompasses approxi~-nately 106 acres in the <br />sourhwest c,•uarter of S25 T4T1 R16W approximately 3 miles norci:west of Nucla, <br />N~ntrose County, Colorado (see Map 11-1, Appendix .~ for study area <br />boundaries). <br />iopograpi:y and Precipitation. The [vucla wildlife study area is located armng <br />flat to gently rolling Farmland at an elevation of 5700 feet. Average annual <br />precipitation at the Union Carbide 4;eather Station (Uravan, Colorado) near <br />the Nucla study area for the years 1972-1979 was 10.08 inches (range of <br />8.03 - 12.24 inches) much of which generally occurred between July and <br />September . <br />Vegetation and Soils. Five major vegetation types occur on the study area: <br />• 1. Upland sagebrush <br />2. Grassland pasture <br />3. Agriculture (Alfalfa field) <br />4. Juniper <br />7. Riparian <br />Of these five types, the agriculture and grassland vegetative types occupy <br />42 and 23€, respectively of the total study area not presently disturbed by <br />ri,ing operations (Mariah Associates 1979). Each vegetation type is <br />discussed separately below. <br /> Upland sac;ehrush vegetation type. The upland sa~;ebni~ii ve~~etation type on the <br />. study area crxr~rises 6.06 acres ar 5.78 of the study area. The type occurs <br />-L;- <br />~uM s > >eeo <br />