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fnE-Cnriln rubbly loam, $ d+ 2~mrrrnl eluprn. 'Phis gently sloping to moderately steep soil occupies alluvia] fans and foothills along the ++'estern edge of the valley. 'fhe steeper slopes are short and the more gentle slopes range to as much as ]mile in lent,;th. The profile of this soil is similar to the one described as repre•.entative of the series, Uut is typically more cobbey and gravelly. Included +vith this soil in mapping are areas of Travelers soils, which make up 5 percent of the unit. F.ock erops out in a fe+v areas. About 6 percent of this unit is included areas of Stunner loam, 3 to G percent slopes, and about 75 percent areas of Luhon loan], 3 to G percent slopes. Runoff is moderate. The erosion hazard is slight. This soil is used mostly for range and wildlife habi- tat (fig. 3). Capability unit V]]s-8 nonirrigated; Limy ];each ranee site. Gerrard Srrics The Gerrard series consists of some+ahat poorly drained m• poorly drained soils 12 to 20 inches deep over sand and gran el. These soils formed in allu+•ium on lo+v terraces, flood plains, and alluvial fans. Slopes are 0 to 1 percent. Elevation is 7,600 to 8,:00 feet. Natural vegetation is dominantly sedges, rushes, tufted hairgrass, and ++•ild iris. The average annual precipitation is about 9 inches, the mean annual air temperature is about 91° F, and the frost-free season is 95 to 1 ] 0 clays. In a representative profile the sm'face layer is eery dark gray loam about ]9 inches thick. ]t is mottled +vith bro+cn in the lu++er part. The underh ing material is ~ ely gravelly IoamJ' sand that extends to a depth of GO inches or more. Permeability is nuulerate, and the acailaUle ++ater capacity is moderate. F,eaction is neutral or mildly alkaline. The effective rooting depth is ]2 to 20 inches. Depth to the seasonal high ++'ater table is about 1 to 11;_ feet. The table is highest late in spring and in summer. 'these soils are used for irrigated meadow, irrigated crops, and range. Reln•esentati+•e profile of Gerrard loam, 2,600 feet south and 20 feet east of the north+cest corner sec. 25, T. d0 N., R. 5 E. Al]-0 to 5 inches; gray (lOYR 5/]) loam, eery dark gray (lOS'P. 3/1) moist; strong fine granular s[ruclu re; <oft, eery friable; 5 percent gravel; mildly alka- line; clear snuoth boundary. A14 5 to 14 inchrs; gray (]OYR 5/1) loam, eery dark gray (]UYR 3/1) moist; common medium distinct mot- tles, broom (i.5S'R 4/4) moist; +veak fine sub- angular blocky structure parting to moderate medium granular; hard, eery friable; neutral; gradual +ca+)~ bounrlarp. IIC19 to 6D ]aches; ver}' graven}' loamy sand. The A hori zan is 1° l0 20 inches thick and is +'ery dark gray and +'ery dark brown to black loam or light clay loam. The content of gravel and cobbles above the IIC horizon ranges from 3 to 15 percent. n LJ CC-Crrrurd h,:~rn. This ncu•ly level soil occupies low terraces, flood plains, and alluvial fans along the Rio Crnnrle and its ma,jur tributaries. Slopes are 0 to 1 percent. The soil is subject to flooding in many places during spring ;md summer +vhen runoff is high from melting sno++• in the mrnult;iins. 'The +vatcr table is about ]2 to ]8 inches belo+c the surface m spring and summer, but generally drops to the gravel substratum in ++'inter. About ]0 percent of this unit is included areas of Shawa loam, 0 to ]percent slopes, and about ]0 percent areris of Alamosa loam and Totxido clay loam. F.unoff is slo+v. The erosion hazard is slight. This soil is used mostly for irrigated meado+v. Irri- gated meadun•s are cut for hay or used for grazing. Some areas are used for cultivated alfalfa and small grain..9 fen• ;u'eas are used fa' range. Capability unit I\'++•-1 irrigated, \'I n•-3 nonirrigated; \Pet Meadow range site. Graccl Pits fp-Crave] pits are open excavations from which ~~r'avel has been obtained fm• roadbuilding.