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Northern San Isabel and Western Pike National Fbrests, Colorado <br />Mean annual air temperature: 360F. to 440F. <br />Average annual snowfall: 100 to 200 inches. <br />COMPOSITION <br />85 percent Handran and similar soils. <br />Contrasting inclusions <br />6 percent soils with a deep dark surface on <br />swales. <br />6 percent soils with less than 35 percent coarse <br />fragments. <br />3 percent Cryaquolls adjacent to stream <br />drainages. <br />TYPICAL PROFILES: <br />Handran <br />Surface layer(s): <br />0 to 10 inches - dark grayish brown, cobbly fine <br />sandy loam. <br />Subsoil layer(s): <br />10 to 17 inches - reddish yellow, very stony <br />sandy loam. <br />17 to 29 inches - reddish yellow, extremely <br />stony sandy loam. <br />29 to 38 inches - light yellowish brown, <br />extremely stony coarse sandy loam. <br />Substratum layer(s): <br />38 to 60 inches - brownish yellow, very cobbly <br />coarse sandy loam. <br />SOIL PROPERTIES AND QUALITIES <br />Handran <br />Effective rooting depth: greater than 60 inches. <br />Drainage class: somewhat excessively. <br />Depth to seasonal high water table: greater <br />than 6 feet. <br />Available water capacity. moderate. <br />Permeability. moderate. <br />Runoff.- medium. <br />VEGETATION <br />Potential natural communities: <br />Handran: mountain big sagebrush/Idaho fescue <br />(Artrv/Feid) and Thurber fescue/Idaho fescue <br />(Feth/Feid). <br />Seral stages: dominated by plants of the <br />respective potential natural communities and <br />introduced grasses and forbs. <br />Present vegetation: dominated by plants of the <br />respective potential natural communities and <br />introduced grasses and forbs. <br />USE AND MANAGEMENT CONSIDERATIONS <br />Major uses: homesites, livestock grazing, wildlife <br />habitat, recreation, scenic vistas and watershed. <br />Mass movement potential. <br />Landslides: low. <br />Page 41 <br />Debris flows: low. <br />Snow avalanche: low. <br />Sediment delivery efficiency. low. <br />Road and trail limitations: <br />Cut and fill slope stability <br />Handran: slight. <br />Improved unsurfaced roads: <br />Handran: slight. <br />Offroad vehicle roads and trails: <br />Handran: moderate- mud during seasonal wet <br />periods. <br />Foot trails and paths: <br />Handran: slight. <br />Revegetation limitations: <br />Handran: slight. <br />Revegetation considerations: Mulch or similar <br />treatment will protect the soil from erosion, help <br />conserve soil moisture, and protect emerging <br />plant seedlings. <br />Wildlife management considerations: This map <br />unit provides food for upland game and non- <br />game animals. <br />Other management considerations: This map <br />unit is also used for livestock grazing. <br />Maintaining and enhancing the potential natural <br />plant community can reduce the erosion hazard <br />and maintain sustained multiple use. <br />Acid precipitation buffering capacity. high. <br />Map Unit: 155F-Quander family, 5 to 40 percent <br />slopes. <br />Ecological Land Unit: 155F-sagebrush, <br />Thurber fescue, and Idaho fescue on montane, <br />dry valleys, upland plains, and alluvial fans. <br />MAP UNIT SETTINGS <br />Location: throughout the survey area. <br />Landform: valleys, upland plains, and alluvial <br />fans. <br />Parent material. slope wash, alluvium, and glacial <br />till. <br />Geologic symbol. Qd. <br />Elevation range: 9,000 to 10,500 feet. <br />Aspect. all. <br />Climatic zone: montane, dry. <br />Mean annual precipitation: 16 to 20 inches. <br />Mean annual air temperature: 360F. to 440F. <br />Average annual snowfall. 100 to 200 inches. <br />COMPOSITION <br />85 percent Quander and similar soils. <br />Contrasting inclusions <br />6 percent soils with a deep dark surface on <br />swales. <br />DRAFT 3/31/2011