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Inventory and Evaluation <br />Requested By: Joy Surveying Date April 9, 2007 <br />by: Betty Kracht <br />Location: Sec. 6&5 T1N <br />R 96 W 6th PM <br />Assisted By: Fred Cummings <br />Rangeland Management Specialist <br />Situation: You requested an inventory of the existing soil and <br />vegetation for a proposed new gravel pit located in, Sections <br />5&6, T 1N, R96W and approximately .6 miles Southeast of Rio <br />Blanco reservoir. You also requested recommendations for the <br />reclamation of the site once mining is completed. <br />Information Provided: The site is presently in an undisturbed <br />condition and has been for grazing by livestock and wildlife. <br />1) Soils - Two soil units occur on this site, 104 Yamac <br />loam, 2 to 15 percent slopes and 11 Borollic Calciorthids-Guben <br />complex, 6 to 50 percent slopes. <br />Soil mapping unit 104 - Yamac loam, 2 to 15 percent <br />slopes makes up the majority of the pit area. This map unit is <br />deep and well drained and occurs on rolling uplands, terraces, <br />and fans. It is formed in eolian and alluvial material. The <br />surface layer is brown loam 4 inches thick. The upper 8 inches <br />of the subsoil is brown loam, and the lower 10 inches is highly <br />calcareous loam. The upper 26 inches of the substratum is very <br />pale brown loam, and the lower part to a depth of 60 inches or <br />more is pale brown loam. Included in this unit are small areas <br />of Forelle loam, Piceance fine sandy loam, Redcreek sandy loam, <br />and Rentsac channery loam. Also included are small areas of <br />strongly alkaline slickspots that are less than 50 feet in <br />diameter and small areas of soils that are subject to gullying. <br />Permeability of the Yamac soil is moderate. Available water <br />capacity is moderate to high. Effective rooting depth is medium, <br />and the hazard of water erosion is slight to moderate. <br />Soil mapping unit 11- Borollic Calciorthids-Guben <br />complex, 6 to 50 percent slopes. This map unit occurs on uplands <br />and the sides terraces. The Borollic Calciorthids portions of <br />1 <br />