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r !1 I 1 1 1 J Loamy Alluvial Land Loamy alluvial land (Lo) is in srales or on flood plains in the northern part of the Area. Slopes are 1 to 5 percmt. These areas are long and narrow, and most of them are less than 40 acres in size. This highly stratified land type is dark colored 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 few gullies 4 to 20 feet deep are in areas once cultivated. Included with this land in mapping are small areas of Sampson loam, Bresser sandy loam, 1 to 3 percent slopes, and Sandy alluvial land. This land is cell drained. Permeability is mod- erate, and available rater 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 3 to 5 years. Effective rooting depth is more than 60 inches. This land has no beneficial seasonal high rater table. All of the acreage is in native grazs and is used for grazing livestock. (Capability unit Vir-1; Overflow range site) Loamy Met Alluvial Land Loamy wet alluvial land (Lw) is in srales and on creek bottoms in the southern part of the Area. Slopes are 1 to 5 percent. These areas are long and narrow. , This land type is stratified. The surface layer is a sandy loam to light clay loam about 20 inches thick. The unde zlying material ranges from clay to sand in texture and ordinarily is stratified. Included with this land in mapping are areas of Sandy wet allwial land. Creek channels, small springs, and marsh areas are also included, This land is poorly drained. Permeability is moderately slow, and available water capacity is moderate to high. Runoff is slow. The erosion haz- ard is slight where vegetation is permanent, but it is high where the land is bare 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 rater table is at a depth of less than S feet, and it may be at the surface in spring. Live springs are near the bottom of the slope in some srales. Most of the acreage is in meadow and is aced for bay and pasture. !t is not suitable for cultivation. (Capability unit W-1; Mountain Meador range site) Stony Steep Land, Cold Stony steep land, cold (Sw) is in the cooler, southern part of the Ax• (plate VII, bottom). Elopes are 9 to 65 pexent. The areas are long stringers on hillsides along the edges of iable- lamds. Ibst of them exceed 100 acres is sise. Cliffs 10 to 100 feet high ax common, and many boulders up to 20 feet in diameter are scattered m the slopes below cliffs. Deep canyons and drainage rays at the base of slopes are cosmon. This land type has a dark-colored surface layer of cobbly and stony sandy loam. The underlying material 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 area of Kettle-Falcon soils, Stony rough land, an. Peyton-Pring-Crowfoot sandy looms, 5 to 25 percent slopes. Surface runoff is rapid, and the erosion hazard is moderate. Soil slippage is common. All of the acreage is in native grass and brush A few ponderosa pine snd Rocky Mountain juniper ar present. Mountain-mahogany and Gambel oak are the dominant vegetKion. The main uses are grazing of livestock and wildlife habitat. (Capability unit VIIs-1; Starry Loam range site) Stony Rough Land Stony rough land (Su) is on hills or knobs and mesa side slopes in the southern part of the Area. Slopes are 5 to 40 percent. These areas are in narrow bands, but most of them exceed 200 acres it sire. About 30 to 90 percent of this land type is Covered with xfiyolite stone. The surface layer, about 6 inches thick, is adark-colored flaggy loam. The underlying material, about 24 inches thick, is a flaggy to gravelly clay foam or sandy clay loam. Rhyo li to is between depths of 20 and inches. Included with this land in mapping are areas o. Fon dis clay loam, 3 to 9 percent slopes, that are on the highest part of the landscape and on mesa tops. Also included on the lower part of slopes •re areas of Peyton-Pring-Crowfoot sandy looms, S to 25 percent slopes. Rhyoli to crops out in area less than 2 acres in size. Permeability is moderate, and available water capacity is low. Runoff is rapid. The erosion hazard is slight to moderate. Soil slippage take place on the steeper slopes. All of the acreage is in native vegetatim con sisting of grazs, mountain-mahogany, and Cambel o It is used for grazing livestock and wildlife hob tai. This land is a good source of rhyolite for building scone (plate VII, top). Some areas ere fined. (Capability unit VIIs-1; Stony Loam range site)