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1 hh rolls Inivnnallw is Irot sits speclflo. Onslte Investlgetlon, testing and analysis by competent personnel is needed before conrtruc• a ~..~y lion or other engineering tuo of soils. 52--Kim-Cascajo complex, 2 to 15 percent slopes. This map unit ~; on breaks where stream terraces cut through fans and fan terraces and is also on fan terraces. Tne native vegetation is manly grasses. Elevation is'S,000 to 6,000 feet. The average annual precipitation .s 10 to 13 inches, the average annual air temperature is 49 to 53 AenfPPe F~ and the average frost-free period is 125 to 165 days. This unit is about 50 percent Kim soil and about 35 percent Cascajo soil. The Kim soil is on foot slopes and in drainageways, and the Cascajo soil is on short, steeper breaks. Included in this unit is about 5 percent shallow, clayey Midway very gravelly clay loam on breaks. Also included is about 10 percent shallow Shingle very stony fins sandy loam on breaks. In the east one-half of Sec. 30, T. 18 S., R. 69 W. This unit F~ includes small areas of soil with a high content of gypsum crystals below depths of 12 to 24 inches. This soil is similar to Kim soil, but the surface of the soil is covered with rock fragments. Uepth to weathered, gypsiferous shales is 35 to 60 inches .• Many of these gravelly or stony areas are covered by pinyon and juniper. The Kim sail is deep and wall drained. It formed in alluvium. Slope is 2 to 10 percent. Typically, the surface layer is pale brown loam about 4 inches thick. Tha substratum to a depth of 60 inches or more is loam. Tha soil is moderately alkaline. Permeability of the Kim soil ~s moderate. Available water ~~ capacity is high. Effective rooting depth is 60 inches or morn. Runoff is slow to rapid, and the hazard of water erosion is slight to high. / 7r ,.