2012-10-01_REVISION - M1979094HR (15)

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I.2.2 Fine Sandy Loam The other soil complex on JD -7 site has been tentatively named "Neville- Paradox fine sandy loamy, 1 to 4 percent slopes." These level to nearly level well- drained soils generally occur on broad alluvial fans and valley floors (see Exhibit U — EPP, Map 5). The Neville soil makes up 45% of the unit; the Paradox about 35 %. More fluevetic Paradox type soils along the drainage ways yields another 10 %. Less than 5% of the complex consists of the Cottonwood variant soils, also similar to Paradox with gypsic mineralogy. Also included are a few small areas where the slope exceeds four percent. The Paradox series (tentative name) is classified as an Ustic Torriorthent, coarse, loamy, mixed (Calcareous), mesic. The soils are deep, well drained, and moderately rapidly preamble. A typical pedon is (colors are for air -dry soil unless otherwise noted): A -- 0 to 6 inches; reddish brown (2.5YR 5/4) fine sandy loam, dark reddish brown (2.5YR %) moist; weak medium sub angular blocky structure; soft, very friable, non sticky and non plastic; strong effervescence, moderately alkaline; clear smooth boundary. AC — 6 to 12 inches; reddish brown (2.5YR 5/4) fine sandy loam, reddish brown (2.5YR 4/4) moist; weak medium sub angular blocky structure; soft, very friable, non sticky and non plastic; strong effervescence, moderately alkaline; clear smooth boundary. C -- 12 to 42 inches; reddish brown (2.5YR 5/4) fine sandy loam, dark reddish brown (2.5YR 4/4) moist; massive; hard, very friable, non sticky and non plastic; strong effervescence, alkaline; gradual wavy boundary. C2 -- 42 to 46 inches; reddish brown (2.5YR 5/4) loam, reddish brown (2.5YR 4/4) moist; massive; hard, very friable, non sticky and non plastic; strong effervescence, moderately alkaline; gradual wavy boundary. C3 -- 46 to 60 inches; reddish brown (2.5YR 5/4) fine sandy loam, reddish brown (2.5YR 4/4) moist; massive; hard, very friable, non sticky and non plastic; strong effervescence, moderately alkaline; These soils are usually calcareous to the surface. The 10 to 40 inch control section is fine sandy loam, loam, loamy fine sand, or sandy clay loam in texture with a weighted clay average of 14 to 17 percent. The A horizon is usually fine sandy loam. Rock fragments are typically 0 to 5 percent but range from 0 to 15 percent. These are fine gravel size and a few of cobble size may be in some pedons. The hue is 2.5YR or 5YR, the value 5 or 6 dry, 3 or 4 moist; and the chroma is 3 or 4. The color of AC and C is the same. Visible calcium carbonate may occur, but typically there is none visible. I -2