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Huerlano County Area, Colorado outcrop that support very little vegetation. Slope is more than 50 percent. Elevation is 9.000 to 12,000 feet. The average annual precipitation is about 20 to 25 inches, the average annual air temperature is 36 to 42 degrees F, and the average frost-free season is 30 to 60 days. This unit makes up about 1 percent of the survey area. It is about 50 percent Rubble Land and 50 percent Rock outcrop. Rubble Land consists of large areas of rock debris. Rock outcrop consists of areas of exposed igenous rock. Wildlife such as pika, ptarmigan, and mountain sheep inhabit this unit. This unit is poorly suited to homesite development. 19, Rogert-Montez-Woodhall Shallow to deep, well drained, sloping to velJl steep soils; mainly on ridges and mountains This map unit is in the western part of the survey area. it is mainly on ridges and mountains. It is also on foot slopes and side slopes. Slope is 5 to 65 percent. The vegetation is mainly grass and conifers. Elevation is 8,500 to 10,000 feet. The average annual precipitation is about 18 to 25 inches, the average annual air temperature is 36 to 42 degrees F. and the average frost-free season is 40 to 70 days. This unit makes up about 1 percent of the survey area. It is about 40 percent Rogert soils, 35 percent Montez soils, and 10 percent Woodhall soils. The remaining 15 percent is components of minor extent. Rogert soils are on mountainsides and ridges. These soils are shallow and well drained. They formed in residuum derived dominantly from granite. The soils are 13 moderately coarse textured and have many rock fragments. Granite is at a depth of 16 inches. Montez soils are on side slopes. These soils are deep and well drained. They formed in colluvium derived dominantly from granite. The surface is covered with a mat of forest litter. The surface layer is moderately coarse textured. The subsoil is moderately fine textured. Below this, to a depth of 50 inches, the soils are coarse textured. Unweathered granite is at a depth of 50 inches. Woodhall soils are on mountains. These soils are moderately deep and well drained. They formed in residuum and colluvium derived dominantly from igneous and sedimentary rock. The surface layer is medium textured. The subsoil is moderately fine textured. Below this, to a depth of 26 to 34 inches, the soils are moderately fine textured or medium textured. Unweathered granite or sandstone is at a depth of 26 to 34 inches. Of minor extent in this unit are Lakehelen, Loberg, Coutis, and Libeg soils. The Lakehelen soils are shallow over sandstone. The Loberg soils are deep and clayey. The Coutis and Libeg soils are deep. They are on uplands and in drainageways at the foot of mountains. This unit is used as summer rangeland, as woodland, and for recreation and wildlife habitat. Wildlife such as elk, mule deer, bear, grouse, band- tailed pigeon, snowshoe hare, porcupine, coyote, and limited numbers of mountain lion and lynx inhabit this unit. This unit is poorly suited to homesite development. The main limitation is steepness of slope. In many areas the shallow depth to bedrock is also a limitation.