2003-08-12_PERMIT FILE - M2003068

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20 The native vegetation is mainly pinyon and juniper. Elevation is 7,000 to 8,200 feet. The average annual precipitation is 12 to 16 inches, the average annual air temperature is 42 to 44 degrees F, and the average frost-free period is 90 to 120 days. Typically, the surface layer is grayish brown very channery foam 4 inches thick. The subsoil is very gravelly sandy clay loam about 13 inches thick. The upper 15 inches of the substratum is very gravelly sandy clay loam, and the lower part to a depth of 60 inches or more is very gravelly sandy loam. The soil is mildly alkaline to a depth of 4 inches and moderately alkaline below that depth. In some areas the surface layer is very cobbly sandy loam. Included in this unit are small areas of Castner and Goemmer soils. Also included are small areas of Rock outcrop on ridges. Permeability of this Brownsto soil is moderate. Available water capacity is low. Effective rooting depth is 60 inches or more. Runoff is medium, and the hazard of water erosion is moderate. This unit is used as woodland and for livestock grazing and wildlife habitat. The potential plant community is mainly pinyon and juniper and an understory of blue grama, Indian riceerass, Scribner needlegrass, mountainmahogany, and mountain muhly. The potential production of the native understory vegetation in normal years is about 600 pounds of air-dry vegetation per acre. Slope limits access by livestock and results in overgrazing of the less sloping areas. Woodland products such as fenceposts, firewood, and pinyon nuts are available on this unit; however, steepness of slope limits access to remove these products. This unit is poorly suited to homesite development. It is limited mainly by steepness of slope. This map unit is in capability subclass Vlle, nonirrigated. It is in the Pinyon-Juniper woodland site. 10-Castner very channery loam, 20 to 70 percent slopes. This shallow, well drained soil is on side slopes and ridges. It formed in residuum and colluvium derived dominantly from interbedded sandstone and siltstone and from shale. The native vegetation is mainly pinyon and juniper. Elevation is 8,000 to 8,600 feet. The average annual precipitation is 13 to 16 inches, the average annual air temperature is 42 to 46 degrees F, and the average frost-free period is 80 to 110 days. Typically, the surface layer is dark grayish brown very channery loam 3 inches thick over extremely channery loam about 8 inches thick. siltstone is at a depth of 11 inches. The soil is mildly alkaline throughout. Included in this unit is about 10 percent Brownsto very channery loam on foot slopes and in narrow drainageways. Also included are small areas of Rock outcrop on ridgetops and on the steeper side slopes. Permeability of this Castner soil is moderate. Available water capacity is very low. Effective rooting depth is 6 to Soil surv 20 inches. Runoff is medium to rapid, and the hazard c water erosion is high to very high. This unit is used as woodland and for livestock grazi and wildlife habitat. The potential plant community is mainly pinyon and juniper and an understory of mountainmahagony, India ricegrass, sideoats grama, and blue. grama. The potent production of the native understory vegetation in norm years is about 500 pounds of air-dry vegetation per ac Slope limits access by livestock and results in overgrazing of the less sloping areas. Woodland products such as high-quality fenceposts firewood, Christmas trees, and pinyon nuts are availat on this unit. Mature stands of trees can produce 4 to cords of firewood per acre if all standing dead trees a removed; however, steepness of slope limits access t remove firewood and fenceposts. Trees for transplant can be obtained from this unit. This unit is poorly suited to homesite development. The main limitations are steepness of slope and shall depth to bedrock. This map unit is in capability subclass Vlle, nonirrigated. It is in the Pinyon-Juniper woodland site. 11-Coldcreek cobbly sandy loam, 25 to 80 percent slopes. This deep, well drained soil is on mountainsides. It formed in residuum and colluvium derived dominantly from interbedded sandstone and siltstone. The native vegetation is mainly coniferous forest. Elevation is 7,500 to 9,000 feet. The average annual precipitation is 20 to 25 inches, the average annual air temperature is 38 to 44 degrees F, and the average frost-free period is 50 to 70 days. Typically, the surface is covered with a mat of parti; decomposed and undecomposed needles and twigs about 2 inches thick. The surface layer is light browni gray cobbly sandy loam about 14 inches thick. The nF layer is very pale brown very cobbly sandy loam 11 inches thick. The upper 12 inches of the subsoil is ve cobbly sandy clay loam, and the lower 13 inches is va cobbly clay loam. Sandstone is at a depth of 50 inchE The soil is slightly acid to a depth of 14 inches and medium acid below that depth. Included in this unit is about 15 percent Trag loam the base of slopes. Permeability of this Coldcreek soil is moderate. Available water capacity is high. Effective rooting dep is 40 to 60 inches. Runoff is medium, and the hazard water erosion is moderate. This unit is used as woodland and for wildlife habit< and recreation. The potential plant community is mainly Douglas-fir and white fir and an understory of kinnikinnick, Comm juniper, sedge, and nodding bromegrass. The potentia production of the native understory vegetation in Horn years is about 100 pounds of air-dry vegetation per ai This unit is suited to limited production of Douglas-1 On the basis of a site index of 55, the potential