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I I I I I I I I I I I I I I I I I I I 002588 The soils are predominantly shallow over sandstone or shale, but deep soils have formed in alluvial and wind-blown deposits that extend over bottomlands, terraces and mesas (2), The Unit 1 surface soils are light colored and range in texture from sandy loam to silty clay, Subsoils are principally clay loam, silty clay loam, or clay and have a moderate to slow permeability rate. Sandy subsoils with a high permeability are relatively rare within the unit. Generally, these soils have an alkaline reaction and are limy at or within a few inches of the surface. Some soils on fans and terraces are very strongly alkaline in reaction and high in exchangeable sodium as evidenced by scattered "slick spots" that are devoid of vegetation, Injurious accumulations of soluble salts are largely restricted to bottomland soils and areas bordering shale bad- lands (2), The soils within the proposed reservoir site are in the White River bottomlands and are alluvial in nature. The surface soils are light colored, thin, and usually calcareous, Unit 2 has more stony surface soils and associated rock outcrop than are present in Unit 1. Con- spicuous rock ledges along Raven Ridge northwest of Rangely, are representative, Surface textures of soils forming from sandstone are usually stony or gravelly sandy loams while clay and clay loam textures are common for shale derived soils. Subsoils range from sandy loam to clay in texture. Over most of the area, underlying sandstone or shale beds are within 20 inches of the surface and plant rooting depths are restricted (2). Of the lands in the service area, the United States Bureau of Reclamation (USBR) has calculated that 3,778 acres are arable, Of this, the estimated net acreage serviceable by project water is about 1,820 acres including 550 acres now irrigated (1), Lands now irrigated are used for pasture for livestock and for the production of alfalfa II-8