Laserfiche WebLink
18 . SOIL SURVEY • <br />18-Rock outcrop-Cryoborolls complex. Areas of this <br />complex are on mountainsides, ridges, end escarpments <br />(fig. 4). They are scattered throughout the survey area at <br />elevations of 8,000 to 13,000 feet. The average annual <br />precipitation is 15 to 30 inches, the average annual air <br />temperature ie 32 to 38 degrees F, and the frost-free <br />season is 20 to 75 days. Slope is 30 W 70 percent. Rock <br />outcrop makes up about 70 percent of this complex and <br />Cryoborolls make up about 20 percent. Included in <br />mapping are small areas of Cryoboralfs and Cryochrepts, <br />which make up the other 10 percent. <br />Rock outcrop consists of exposed hard bedrock of mixed <br />materials including granite, sandstone, end shale. <br />Cryoborolls are shallow and moderately deep, well <br />drained loamy soils that are stony throughout. They are <br />steep and very steep. They have a dark colored surface <br />layer, and bedrock is at a depth of 10 to 40 inches. Reaction <br />is slightly acid to moderately alkaline. <br />Cryoboralfs are shallow and moderately deep, well <br />drained loamy soils that are stony throughout. They aze <br />steep and very steep. They have a light colored, bleached <br />subsurface layer and a strongly developed subsoil <br />Bedrock is at a depth of 10 to 40 inches. Reaction ie <br />strongly acid to slightly acid. <br />Cryochrepts are shallow to moderately deep, well <br />drained, loamy soils that are stony throughout. They are <br />steep and very steep. They have a dazk colored surface <br />layer and a weakly developed subsoil. Bedrock is at a <br />depth of 10 to 40 inches. Reaction is moderately acid to <br />very strongly acid. <br />Permeability of these soils is rapid and the available <br />water capacity is tow. Surface runoff is rapid. The hazard <br />of wind erosion is slight, and the hazard of water erosion <br />is moderate. <br />Most of the acreage is range far wildlife. Small areas <br />can be used as range for livestock. These areas are so in- <br />accessible that then use for agriculture or recreation <br />homesite subdivisions is limited. <br />The dominant native vegetation at elevations of 8,000 <br />to 9,000 feet consists of wheatgrasses, bluegrasses, <br />sagebrush, snowberry, antelope bitterbrush, and nu- <br />merous forbs. At elevations of 9,000 to 11,500 feet, native <br />vegetation consists of lodgepole pine, Engelmann spruce, <br />subalpine fir, and a sparse underetory of grasses, shrubs, <br />and forbs. At elevations above 11,500 feet, native vegeta- <br />tion is dominated by willows, sedges, and numerous forbs. <br />19C-Youga loam, 0 to 6 percent elopes. This ie a <br />deep, well drained, nearly level to gently sloping soil on <br />mountainsides. It formed in glacial drift derived from <br />various sources. The average annual precipitation is about <br />18 inches, the average annual a'v temperature is about 3? <br />degrees F, and the frost-free season is 30 to 75 days. <br />Elevation is 7,500 to 9,000 feet. <br />Small areas of Quander, Leavitt, Cimarron, and Anvik <br />soils are included in mapping. ALgo included are areas that <br />have 1 to 2 inches of peat on the surface and mottling in <br />the subsoil as a result of rnntinuous irrigation. <br />Typically, the surface layer is dark grayish brawn loam <br />about 12 inches thick. The subsoil is yellowish brown and <br />strong brown clay loam about 53 inches thick. The sub- <br />stratum is light yellowish brown sandy clay loam to a <br />depth of 60 inches or more. <br />Permeability is moderately slow, and the available <br />water capacity is high. Surface runoff is medium. The <br />hazard of wind and water erosion is slight, <br />Most of the acreage is rangeland that is also used for <br />recreation, wildlife, andvrigated grass hayland. A cold <br />climate and a short growing season limit the production <br />of introduced grasses and preclude use of this soil as <br />cropland. <br />Management of this soil far range should include a <br />deferred grazing system and brush control. Where this <br />soil is irrigated, ditches and fields should be designed <br />carefully to properly control irrigation water. Grasses <br />recommended for seeding include western wheatgrass, <br />slender wheatgrass, bluebunch wheatgrass, mountain <br />brome, Arizona fescue, and big bluegrass. The dominant <br />native vegetation consists of wheatgrass, Junegrass, big <br />sagebrush, snowberry, and numerous forbs. The total an- <br />nual production averages about 1,G00 pounds of air-dry <br />forage per acre. <br />There are no restrictive soil properties to be considered <br />in the design of access roads and recreation homesite sub- <br />divisions. However, all-weather asphalt surfaces are im- <br />practical unless provisions are made to offset frost action. <br />Rangeland wildlife includes mule deer, sage grouse, <br />white-tailed jackrabbit, mourning dove, ground squirrels, <br />and yellow-bellied marmot. Capability suLclass Vle. <br />19D-Youga loam, 6 to IS percent slopes. This is a <br />deep, wep drained, moderately sloping to strongly sloping <br />soil on mountainsides. !t formed in glacial drift derived <br />from a variety of sources. The average annual precipita- <br />tion is about 18 inches, the average air temperature is <br />about 37 degrees F, and the frost-free season is :i0 to 75 <br />days. Elevation is 7,500 to 9,000 feet. <br />Small areas of Quander, Leavitt, Cimarron, and Anvik <br />soils are included in mapping. Also included are areas that <br />have 1 to 2 inches of peat on the surface and mottling in <br />the subsoil as a result of continuous irrigation, <br />Typically, the surface layer is dark grayish brown loam <br />about 12 inches thick. The subsoil is yellowish brown and <br />strong brown clay loam about 53 inches thick. The sub- <br />stratum is light yellowish brown sandy clay loam to a <br />depth of 70 inches or more. <br />Permeability is moderately slow, and the available <br />water capacity is high. Surface runoff is medium. The <br />hazazd of wind erosion is slight, and the hazard of water <br />erosion is moderate. <br />Most of the acreage is rangeland that is also used fog <br />recreation and wildlife habitat and as imgated grass hay <br />land. A cold climate and a short growing season limit the <br />production of introduced grasses and preclude use of the <br />soil as cropland. <br />Management of this soil for range should include ; <br />deferred grazing system and brush control Where thi <br />