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(Refuge Pit) EXHIBIT C -2 (Page 3) <br />Moffat County Area, Colorado <br />Mean annual air temperature: 45 to 48 degrees F. <br />(7.2 to 8.9 degrees C.) <br />Freeze -free period: 90 to 105 days <br />Map Unit Composition <br />Willwood and similar soils: 55 percent <br />Sheppard and similar soils: 35 percent <br />Minor components: 10 percent <br />Component Descriptions <br />Willwood soils <br />Landform: Alluvial fans <br />Parent material: Alluvium derived from sandstone and <br />quartzite <br />Slope: 1 to 12 percent <br />Drainage class: Excessively drained <br />Slowest permeability: 2.0 to 6.0 in./hr. (moderately <br />rapid) <br />Available water capacity: About 1.6 inches (very low) <br />Shrink -swell potential: About 1.5 percent (low) <br />Runoff class: Low <br />Calcium carbonate maximum: About 2 percent <br />Gypsum maximum: None <br />Salinity maximum: About 2 mmhos /cm (nonsaline) <br />Sodium adsorption ratio maximum: About 1 (slightly <br />sodic) <br />Ecological site: Sandy Cold Desert <br />Potential native vegetation: needleandthread, Indian <br />ricegrass, shadscale saltbush, spiny hopsage, <br />Wyoming big sagebrush, bottlebrush squirreltail, <br />sand dropseed, Nevada bluegrass <br />Land capability subclass (nonirrigated): 6e <br />Typical Profile: <br />0 to 8 inches; loamy sand <br />8 to 60 inches; extremely cobbly sand <br />Sheppard soils <br />Landform: Alluvial fans <br />Parent material: Alluvium derived from sandstone and <br />quartzite <br />Slope: 1 to 12 percent <br />Drainage class: Excessively drained <br />Slowest permeability: 2.0 to 6.0 in. /hr. (moderately <br />rapid) <br />Available water capacity: About 5.4 inches (low) <br />Shrink -swell potential: About 1.5 percent (low) <br />Runoff class: Low <br />Calcium carbonate maximum: About 5 percent <br />Gypsum maximum: None <br />Salinity maximum: About 2 mmhos /cm ( nonsaline) <br />Sodium adsorption ratio maximum: <br />About 0 (nonsodic) <br />Ecological site: Sandy Cold Desert <br />Potential native vegetation: needleandthread, Indian <br />ricegrass, bottlebrush squirreltail, shadscale <br />saltbush, Wyoming big sagebrush, sand <br />dropseed, spiny hopsage <br />Land capability subclass (nonirrigated): 6e <br />Typical Profile: <br />0 to 4 inches; loamy fine sand <br />4 to 60 inches; loamy fine sand <br />Minor Components <br />Soils with extremely cobbly subsoil and similar soils <br />Composition: About 10 percent <br />Landform: Alluvial fans <br />— Willwood- Tipperary complex, 1 to <br />181 <br />percent slopes <br />Map Unit Setting <br />Major Lan • Resource Area: 34 <br />Elevation: 5, ' 00 to 5,600 feet (1,615 t% 1,707 meters) <br />Mean annual • ecipitation: 7 to 10 in hes (178 to 254 <br />millimeters) <br />Mean annual air t mperature: 45 • 48 degrees F. <br />(7.2 to 8.9 deg es C.) <br />Freeze -free period: ' • to 105 • -y <br />Map U 't C • position <br />Willwood and similar soil 55 percent <br />Tipperary and similar so s 35 percent <br />Minor components: 10 •ere <br />C om <br />criptions <br />Willwood soils <br />Landform: Terrac escarpments <br />Parent material Alluvium derived fr <br />Slope: 12 to 4(i percent <br />Drainage cl s: Excessively drained <br />Slowest pe meability: 6.0 to 20 in. /hr. (r. •id) <br />Available ater capacity: About 1.5 inche very low) <br />Shrink -s ell potential: About 1.5 percent (lo ) <br />Runoff lass: Low <br />Calci m carbonate maximum: About 2 percen <br />Gyp um maximum: None <br />Sa nity maximum: About 2 mmhos /cm (nonsalin <br />Sodium adsorption ratio maximum: About 1 <br />(slightly sodic) <br />mixed sources <br />