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1 1 1 ~~ Loamy Alluvial Land Loamy alluvial land (Lo) is in swales or m flood plains in the northern part of the Axa. Slopes art 1 to 5 percent. These areas are long and narra+, and asst of them are less than 10 acxs in size. This highly stratified land type is dark coloxd to a depth of 30 inches or more. To a depth of 20 inches this land is sandy loam to clay loam in tex- ture. Below that it is loamy sand to clay loam. A far gullies 4 to 20 feet deep are in sxas once cultivated. Included with this land in mapping ax small areas of Sampson loam, Bresser sandy loam, 1 to 3 percent slopes, and Sandy alluvial land. This land is well drained. Permeability is mod- erate, and available water capacity is moderate to high. Runoff is medium. The erosion hazard is mod- erate to high. This land is flooded, usually every year, or at least once every S to 5 years. Effective trooting depth is more than 60 inches. This land has no beneficial seasonal high rater table. All of the acreage is in native grass and is used for grazing livestock. (Capability unit VIr-1; Ove rflor range site) Loamy Met Alluvial Land Loamy wet alluvial land (Lw) is in swales and on exek bottoms in the southern part of the Ana. Slopes ax 1 to 5 percent. These areas are long and narrow. This land type is stratified. The surface layer is a sandy loam to Iight clay loam about 20 inches thick. The underlying material ranges from clay to sand in texture and ordinarily is stratified. Included with this land in mapping ex sxas of Sandy vet alluvial land. Lxek channels, small springs, and marsh areas are also included. This land is poorly drained. Permeability is moderately slow, end available rater capacity is moderate to high. Runoff is slow. The erosion haz- ard is slight where vegetation is permanent, but it is high There the lend is box as a result of flooding. This land ordinarily is flooded once a year, and not less than once in 5 years. The sea- sonal high water table is at a depth of less than 5 feet, end it may be at the surface in spring. Live springs are near the bottom of the slope in some swales. Most of the acreage is in meadow and is used for hay and pastux . It is not suitable for cultivation (Capability unit W-1; Mountain Meador range site) Story Steep Land, Cold 6tony steep land, told (Sr) is is the cooler, southern part of the Area (plate YII, bottom). 63opes ax 9 to 65 pexent. The axes ax lmg stringers m hillsides almg the edges of table- lands. Most of them eaeeed 100 aexs !a si:e. Cliffs 10 to l00 feet high ax cosmon, cad many boulders up to ZO feet in diameter ax stattexd m Ne slopes below cliffs. Deep canyons and drainage rays at the bue of slopes ax tomon. This lend type has • dark-wloxd surface layer of cobbly and story sandy loam. The underlying amterial is cobbly and gravelly sandy loam to clay loam. Shale or sandstone is between depths of 20 and 40 inches. Included with this land in mapping are small axu of Kettle-Falcon soils, Stony xugh land, ani Peyton-Pring-Crowfoot sandy looms, 5 to 25 percent slopes. Surface nmoff is rapid, and the emsim hazard is moderate. Soil slippage is common. All of the acxage is in active grass and brush. A few pondexsa pine and Rocky lbuntain juniper an pxsent. Mountain-mahogany and Gambel oak ax the doainant vegetatim. The main uses ax jrazing of livestock and wildlife habitat. (Capability unit VI Is-1; Story Loam range site) Story Rough Land Stony xugh lend (Su) is m hills or knobs end mesa side slopes in the southern part of the Axa. Slopes are 5 to d0 percent. These axes ax in narrow bends, but cost of them exceed 200 aexs in size. About 30 to 90 percent of this land type is eovexd with rhyolite stone. The surface layer, about 6 inches thick, is a dark-coloxd finggy loam. The mderlying material, about 20 inches thick, is a flaggy to gravelly clay loam or sandy clay loam. Rhyolite is between depths of 20 and IO inches. Included with this land in napping ax axes of Fmdis clay loam, 3 to 9 percent slopes, that sx on the highest part of the landscape and on mesa tops. Also included m the laver part of slopes ax areas of Peyton-Pring-Crowfoot sandy looms, S to 25 percent slopes. Rhyolite amps out in axes less than 2 acxs in size. Permeability is moderate, and available rater capacity is low. Rmoff is rapid. The erosion hazard is slight to moderate. Soil slippage takes place on the steeper slopes. All of the aexage is in native vegetatim con- sisting of grass, aountain-mahogany, end Gambel oak. It is used for grazing livestock and wildlife habi- tat. This land is a good source of rhyolite for building stone (plate YII, top). Some areu ax mined. (Capability unit VIIs-1; Stony Loam range site)