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EXHIBIT I <br />20-Brownsto-Castee complex, 3 to 25 percent slopes <br />Map Unit Setting <br />MLRA:34 <br />Elevation: 6,400 l0 7,400 feet (1,951 to 2,256 meters) <br />Mean annua/precipitation: 11 to 13 inches (279 to 330 millimeters) <br />Average annual air temperature: 41 to 45 degrees F. (5 to 7 degrees C.) <br />Frost-free period: 75 to 95 days <br />Map Unit Composition <br />Brownsto and similar soils: 50 percent <br />Castee and similar soils: 30 percent <br />Minor components: 20 percent <br />Component Descriptions <br />Brownsto soils <br />Landform: Break, plateau <br />Parent material: Relict fluvial gravel deposits derived from mixed sources <br />Slope: 3 to 25 percent <br />Drainage class: Well drained <br />Slowest permeability: About 0.60 inihr (moderate) <br />Available water capacity: About 5.1 inches (tow) <br />Shrink-swell potential: About 1.5 LEP (low) <br />Flooding hazard: None <br />Seasonal water table minimum depth: Greater than 6 feet <br />Runoff class: Medium <br />Calcium carbonate maximum: About 40 percent <br />Gypsum maximum: None <br />Salinity maximum: About 4 mmhos/cm (very slightly saline) <br />Sodicity maximum: About 1 SAR (slightly sodic) <br />Ecological site: Loamy 10-14" Ppt <br />Potential native vegetation: Wyoming big sagebrush, bluebunch wheatgrass, shadscale saltbush, <br />Indian ricegrass, Nevada bluegrass, bottlebrush squirreltail, needleandthread, prairie <br />Junegrass, streambank wheatgrass <br />Land capability (non irrigated): 6e <br />Typical Profile: <br />Ht-0 to 3 inches; gravelly loam <br />H2-3 to 14 inches; gravelly loam <br />H3-14 to 29 inches; very cobbly loam, very gravelly sandy clay loam <br />H4-29 to 60 inches; very cobbly sandy loam, very gravelly sandy clay loam <br />Castee soils <br />Landform: Break, plateau <br />Parent material: Loess deposited on relict fluvial gravel deposits <br />Slope: 3 to 25 percent <br />Drainage class: Well drained <br />Slowest permeability: About 0.60 in/hr (moderate) <br />Available wafer capacity: About 7.7 inches (moderate) <br />Shrink-swell potential: About 1.5 LEP (low) <br />Flooding hazard: None <br />Seasonal water table minimum depth: Greater than 6 feet <br />Runoff class: Medium <br />Calcium carbonate maximum: About 55 percent <br />Gypsum maximum: None <br />Salinity maximum: About 4 mmhoslcm (very slightly saline) <br />Exhibit I (page 1) <br />