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<br />o <br />o <br />(.J1 <br />~ <br /> <br />Wash channel and spreading it over the existing soil may create a high pH condition and degrade <br />existing vegetation and soil condition. In consideration of this possibility the water spreader <br />treatment opportunity has been given a very low priority for implementation. <br /> <br />TA-13 , Detention Dams - <br /> <br />Treatment Area 13 covers an area of approximately 443 acres in the upper Sagers Wash <br />Watershed and approximately 6116 acres in the upper Pinto Wash Watershed. Both areas are <br />located at the base of the Book Cliffs. The treatment area has a south-southeast aspect with <br />slopes ranging from 4% to shear cliffs. Average annual precipitation ranges from 8 to 16 inches <br />with the greatest percentage of the area receiving 8 to 12 inches annually. The dominant <br />vegetation in the treatment area is Atriplex (saltbush). The dominant soils in the treatment area <br />are Chipeta complex, Killpack-Chipeta complex, Mesa-Chipeta-Thedalund family complex, <br />Hanksville family-Badland complex, Mesa- Trook complex, and Thedalund family-Rock outcrop- <br />Badland association. These soils are moderately to strongly saline. Chipeta soils are high in <br />gypsum and are prone to piping and failure when wet. Soils high in gypsum are not <br />recommended as earthfill material. <br /> <br />~ <br /> <br />l <br />i <br /> <br />42 <br />