2017-02-03_PERMIT FILE - C1980004 (25)

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effervescent; from lab data: pH=8.8 (strongly alkaline), EC=1.63 (nonsaline), SAR=13.6 (highly sodic); OM=1.2% (medium); gradual wavy boundary. C2 horizon — 40 to 60 inches; pale brown (10YR 6/3) sandy loam with about 25% small mixed gravels, brown (10YR 5/3) moist; massive structure; hard dry consistence, firm moist consistence, and slightly sticky and slightly plastic wet consistence; moderately effervescent; from lab data: pH=9.0 (strongly alkaline), EC=3.71 (very slightly saline), SAR=29.0 (highly sodic); OM=1.5% (medium); gradual wavy boundary. C3 horizon — 60 to 96 inches (5 to 8'); yellowish brown (10YR 5/4) loam with about 20% mixed gravels, dark yellowish brown (10YR 4/4) moist; massive structure; hard dry consistence, firm moist consistence, and slightly sticky and slightly plastic wet consistence; moderately effervescent; from lab data: pH=8.8 (strongly alkaline), EC=4.36 (slightly saline), SAR=34.7 (very highly sodic); gradual wavy boundary; did not hit bedrock. Cameo fine sandy loam (Map Unit H) Topsoil Suitability and Recommended Salvage Depth: Topsoil 10"/ Subsoil 10" The upper 20 inches of Cameo fine sandy loam (Map Unit H) is entirely "suitable" (WDEQ, 1996) and could be salvaged for use in subsequent future reclamation. This topsoil and upper subsoil material is both nonsaline and nonsodic and has good soil texture and organic matter content. Below about 20 inches in depth, Cameo fine sandy loam can have high exchangeable sodium (high SAR), low organic matter content, and coarser textures in some profiles and this lower material is not recommended for salvage. The upper 10 inches of Cameo fine sandy loam is recommended for salvage as Topsoil and the underlying 10 inches recommended for salvage as Subsoil. 3.2Map Unit I: Unnamed fine sandy loam,1 to 20% slopes Unnamed fine sandy loam (Map Unit 1) occupies one delineation near the center of the soils study area. It is an elongate, oval-shaped, east -west trending landform that is essentially perpendicular to the strike of the East Salt Creek valley. Two theories have been discussed concerning what it is. The first, described by J.E. Stover based on discussion with the project geologist, is that a landslide occurred in the past and started on the steep upland on the west side of the creek and carried the material downslope and then to the east across both the creek and most of the adjacent valley. Today, East Salt Creek is free-flowing without landslide debris in it. The hillside area where the landslide originated is said to be visually evident when looking to the west in that direction. The second theory, suggested by J. Nyenhuis, is that an earthen dam was constructed across the valley some decades ago, and therefore is a 19 -foot high man-made "dam" structure. Support for this theory lies in the elongate, symmetricaloval shape of the feature and its nearly flat top. There are concrete remnants of a former irrigation system structure immediately adjacent to where the landform abuts East Salt Creek. The landform does not quite reach all the way across the valley to the east, stopping just short of the steep mountain sideslope. Currently, there is a north -south two -track trail that goes between the -10-