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,. <br /> <br />I ~. <br />RS-EF Goldvale very stone Fine sandy loam, 2~5 to 65 1~erccnt slopes <br />This deep, well drained soil is on steep mountainsides and sidc- <br />slopes of valleys. It formed in alluvium from interbedded sandstone and <br />shale. Elevation is 7,500 [0 1,800 feet. The average annual precipitation <br />ranges from 18 to 25 inches. The average annual air temperature is G1 to <br />45 degrees. The average frost-free season is about 90 to 110 days. <br />Typically, the surface is covered by a one inch thick layer of ~~rganic <br />material. The surface layer is a reddish gray very stony fine sandy loam <br />about 3 inches thick. The lower part of the surface layer is pinkish gray <br />very stony fine sandy loam about IO inches thick. The upper part of the <br />subsoil is a mixed light reddish brown and pinkish gray stony sandy clay <br />loam about 8 inches thick. The middle part is a reddish brown clay about <br />24 inches thick. The lower par[ is mixed reddish brown and yellowish brown <br />• stony clay extending to 60 inches or more. <br />Included with this soil in mapped areas are about 20 percent Fort <br />Wingate stony fine sandy loam and small areas of Valto, Anvik, and Nordic <br />soils. <br />Permeability is slow. Effective rooting depth is 60 inches or more. <br />Surface runoff is medium and the erosion hazard is low. Available wator <br />capacity is high. <br />This unit is well suited to the production of Ponderosa pine. Based <br />on a site index of 70, the potential production of marketable timber is <br />4,480 cubic feet or 22,000 board feet per acre (International rule) from <br />an even-aged, fully stocked stand of trees 100 years old. The main concerns <br /> in producing and harvesting timber are reforestation and prevention of water <br /> erosion along roads and other areas where vegetation has been removed. Tree <br />