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Mud Creek Pit -Reclamation Permit Application -112 (C) Exhibits Page 39 of 67 <br />Table I-1. Soils Descriptions <br />Unit 26 <br />Name Collide complex, 2 to 6 percent slopes <br />Description This map unit is a complex of very deep, well drained soils on terraces. Elevation is 7,000 <br /> [sic] to 7,600 feet. The average annual precipitation is 15 to 17 inches, the average annual <br /> air temperature is 46 to 50 degrees F, and the average frost-free period is 100 to 120 days. <br /> This map unit is 45 percent Collide clay loam soil and similar inclusions, 40 percent Collide <br /> cobbly substratum soil and similar inclusions and 15 percent contrasting inclusions. <br /> Contrasting Inclusions <br /> This unit includes ustorthents on hills and escarpments and sideshow soils on alluvial fans. <br /> Vegetation <br /> The ecological site is Loamy Foothills. The dominant vegetation includes 20 percent western <br /> wheatgrass, 20 percent muttongrass ,15 percent big sagebrush, 5 percent bottlebrush <br /> squirreltail, 5 percent rubber rabbitbrush and 5 percent neeldeandthread. The potential <br /> production of native vegetation on these soils is 1300 pounds on a normal year. <br /> Soil Management Implications <br /> Major uses are pasture and hayland. This unit suitability for rangeland is good, suitability for <br /> crop land is fair and suitability for building site development is poor. Prime cropland if <br /> irrigated. <br /> Notes <br /> Prime Farmland <br /> Wind Erodibility Group: 6 <br /> Hydrologic Group: C <br /> The Collide clay loam parent material is eolian material from a sandstone source. The Collide <br /> clay loam is well drained. Typically, the top 0 to 10 inches is dark grayish brown clay loam. <br /> The next 10 to 29 inches is yellowish red clay loam. The next layer to a depth of 60 inches is <br /> yellowish red to light reddish brown clay loam. <br /> Permeability of Collide clay loam is slow. Available water capacity is high. The potential <br /> rooting depth is 60 inches or more. Runoff is high, the hazard of water erosion is slight. The <br /> shrink-swell potential is high. <br /> Similar inclusions are made up of Purcella soils on terraces. <br />McStone Aggregates, LLC 15 FEB 2008 ©WASTELINE,INC 2008 PN 5006.1-4(009) <br />