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39-Renohill-Louviers complex, 8 to 25 percent slopes. These moderately deep and shallow, moderately sloping to moderately steep, ~.vell drained soils are on upland hills, ridges, and valley side slopes. Elevation rsrges from 5,300 to 6.400 feet. Average annual orec;pi- taticn ranges from about 14 to tl inches, and average zr.nual air temperature ~s about 47 degrees F. The Rer.o- 'rl _Cii „ ckaS ~~p 3c-0Ut YO pcrCanl Of the 1-Cit aM; th2 Louviers"soil about 30 percent. The Renohill soil is on :ne valley side slopes and the wider ridgetcps. The Lou- viers sod is generally on we narrow ridgetops, slope Creaks, and knobs but may 6e found anywhere in the mapped area. Included .vith this complex in mapping, and making up about 30 percent of the unit are Cushman loam and ~"turn clay Team that have 4 to 8 percent slopes. Also nc!.uded era 5t=~?, CaCly eroded areas that ha~re very sparse vegetation and contain an intricate maze of narrow ravines, sharp crests, and pinnacles. Tire Renohill soil is moderately deep and formed in residuum weathered from interbedded sandstone and shale. Typically, the surface layer is grayish brown clay loam about 2 inches thick. The subsoil is grayish brown, light olive brown, and light yellowish brown clay and clay loam. It is calcareous in the lower part Below that is in*.erbedded sandstone and clay shale at a depth of about 24 inches. Psrmeahility is stow, and available water capacity to moderate. The effective rooting depth is 20 to a0 inches. Surface runoff is rapid, and the hazard of erosion is high. The Louviers soil is shallow and farmed in material weathered tram nortcalcareous shale. Typically, the sur• loos layer is Tight brownish gray clay about 5 inches thick. The substratum is grayish brawn clay [o a depth of about 14 Inches. 9elow that is clay shale. ~I Permeability is slew, and available water capacity is low. The effective rooting depth is 10 to 20 inches. Surface runoff is rapid, and the hazard of erosion is high. These soils are used mostly tar grazing. A few open clay minas are in this mapced ar=_a. Rangeland vegetation is mainly •.vestern wheatgrass, !.;':e C!ue_tem, needlear:dthr=_zd, blue grama, green needlegrass ~.vintartat, and sidecars grama. Following prolonged overgrazing, native bluegrasses, annual grasses; and weeds increase. Contour furrgwing or pit- ting aids in the recovery of depleted vegetation on these sails by reducing runoff and increasing water infiltration. Areas that have tlense stands of pricklypear or rabtit- brush can be managed ty chemical control of these species. Thess sails are generally unsuited to windbreaks or environmental plantings. Onsite investigation is goner=_f!v needed to determine which special planting practices era needed to insure survival. These soils have severs limitations for the construc- tion of homesites, roads, and other urban deve!cpments tecacse of }ha depth to tedreck, ;IC•.v cermeatifity. h~7n shrink-swell potential, low strength, and slopes. Intensive and cosL'y measures are needed to minimize these limit• inq soil properties. This complex is in cacability.scbc!ass Vlfe, nonirrgat- ed. THIS SOIL IS IN HET, CLASS 1 FOR 1~^li D [[NN WATT. THERE ARE NO HYDRIC COMPO~ITS LV ~ THIS SOIL IINIT.