2008-03-03_PERMIT FILE - C2006085 (13)

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~' • • Fremont County Area, Colorado and needleandthread. The average annual production of air-dry vegetation is about 1,100 pounds per acre. If the condition of the range deteriorates, blue grama, sand dropseed, yucca, and rabbitbrush increase. Range seeding is suitable if the range is in poor condition. This soil is well suited to homesite development. The capability classification is IVe, nonirrigated. The soil is in the Sandy Foothill #210 range site. 82-Pendant extremely gravelly loam, 10 to 40 percent slopes, very stony. This shallow, well drained soil is on hilly cuestas and pediments. It formed in residuum derived dominantly from limestone. The native vegetation is mainly pinyon and juniper. Elevation is 7,100 to 7,400 feet. The average annual precipitation is 14 to 16 inches, the average annual air temperature is 44 to 46 degrees F, and the average frost-free period is 100 to 120 days. Typically, 1 to 3 percent of the surface is covered with stones. The surface layer is brown extremely gravelly loam about 4 inches thick. The subsurface layer is extremely gravelly loam about 7 inches thick. Limestone is at a depth of about 11 inches. The soil is moderately alkaline. Included with this soil in mapping are areas of Kerhayden soils in drainageways and Bronell soils on foot slopes. Kerhayden soils have a surface layer of gravelly sandy loam. They make up about 5 percent of the unit. Bronell soils have a surface layer of very gravelly loam. They make up about 5 percent of the unit. Also included are areas of rock outcrop. These areas make up about 5 percent of the unit. They occur throughout the unit as exposed surfaces of bedrock and as low ledges about 1 to 6 feet high. Permeability is moderate in the Pendant soil. Available water capacity is very low. Effective rooting depth is 7 to 20 inches. Runoff is rapid, and the hazard of water erosion is very high. This soil is used as noncommercial woodland or for livestock grazing. The potential plant community is mainly pinyon and juniper and an understory of sideoats grama, blue grama, Scribner needlegrass, Indian ricegrass, and mountainmahogany. The potential production of native understory vegetation in normal years is about 200 pounds of air-dry vegetation per acre. If the condition of the understory deteriorates, blue grama, red threeawn, pricklypear, and broom snakeweed increase. The pinyon and juniper have been chained in most areas. Removing pinyon and juniper increases the production of understory forage. Range seeding should be in conjunction with removal of the overstory. Mechanical treatment is not practical because of surface stoniness and the slope. Deferring grazing in 6 harvested areas for at least 2 years ensures the development of a plant cover that is sufficient to protec the soil from erosion. This soil is poorly suited to homesite development. The main limitations are the slope and the depth to bedrock. The capability classification is Vlls, nonirrigated. The soil is in the Pinyon-Juniper woodland site. 83-Penrose-Minnequa complex, 2 to 25 percent slopes. These soils are on ridges, plains, and short breaks. The native vegetation is mainly grasses. Elevation is 5,000 to 5,400 feet. The average annual precipitation is 11 to 13 inches, the average annual air temperature is 50 to 53 degrees F, and the average frost-free period is 150 to 170 days. This unit is about 45 percent Penrose soil and 40 percent Minnequa soil. The Penrose soil is mainly on ridges and breaks and in the steeper areas. Scattered juniper trees are common in areas of the Penrose soil. The Minnequa soil is mainly on side slopes and in the gently sloping areas. Included with these soils in mapping are areas of the deep Manvel soils on toe slopes and swales. These soils have a surface layer of silt loam. They make up about 10 percent of the unit. Areas of limestone rock outcrop are on the tops of ridges and on breaks. These areas make up about 5 percent of the unit. Also included are small areas of the moderately deep Gaynor soils in drainageways along the eastern base c Skyline Ridge in Canon City. These soils are clayey. The Penrose soil is shallow and well drained. It formed in residuum derived dominantly from limestone. Slopes range from 2 to 25 percent. The surface layer is typically light brownish gray channery loam about 4 inches thick. The substratum is channery loam about 1 inches thick. Limestone bedrock is at a depth of about 15 inches. The soil is moderately alkaline. Permeability is moderate in the Penrose soil. Available water capacity is very low. Effective rooting depth is 10 to 20 inches. Runoff is slow to very rapid, and the hazard of water erosion is slight to very high. The Minnequa soil is moderately deep and is well drained. It formed in residuum derived dominantly from limestone and shale. Slopes range from 2 to 15 percent. The surface layer is typically light brownish gray silt loam about 2 inches thick. The subsoil and substratum are silty clay loam about 26 inches thick. They are underlain by slightly hard, fractured limestone at a depth of about 28 inches. The soil is moderately alkaline. Permeability is moderate in the Minnequa soil. Available water capacity is low. Effective rooting depth is 20 to 40 inches. Runoff is slow or medium, and the