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ADVANCED COPY SUBJECT TO CHANGE <br />• <br />• <br />• <br />901-Haplic Torriarents (gravel <br />pits) <br />Map Unit Setting <br />Major Land Resource Area: 34B <br />Elevation: 4,700 to 7,000 feet (1,433 to 2,134 <br />meters) <br />Mean annual precipitation: 8 to 12 inches (203 <br />to 305 millimeters) <br />Mean annual air temperature: 47 to 51 degrees <br />F. (8.3 to 10.5 degrees C.) <br />Frost-free period: 125 to 160 days <br />Map Unit Composition <br />Haplic Torriarents and similar soils: 80 percent <br />Minor components: 20 percent <br />Component Descriptions <br />Haplic Torriarents soils <br />Landscape: River valleys, foothills, outwash <br />plains <br />Landform: - error in exists on -- <br />Position on landform: Unspecified <br />Parent material. Gravelly alluvium derived from <br />mixed sources, gravelly outwash derived <br />from mixed sources <br />Slope: 0 to 180 percent <br />Surface fragments: About 50 percent rounded <br />gravel <br />Depth to restrictive feature: Unspecified <br />Drainage class: Excessively drained <br />Slowest permeability. 2.0 to 6.0 in/hr <br />(moderately rapid) <br />Available water capacity: About 1.8 inches (very <br />low) <br />Shrink-swell potential: About 0.0 percent (low) <br />Flooding hazard: None <br />Ponding hazard: None <br />Seasonal high water table depth: Unspecified <br />Runoff class: Low <br />Calcium carbonate maximum: About 5 percent <br />Gypsum maximum: None <br />Salinity maximum: About 0 mmhos/cm <br />(nonsaline) <br />Sodium adsorption ratio maximum: About 0 <br />(nonsodic) <br />Relative effective annual precipitation: <br />Unspecified <br />Ecological site: Unspecified <br />Potential native vegetation: Unspecified <br />Land capability subclass (irrigated): 7s <br />Land capability subclass (nonirrigated): 7c <br />Typical Profile: <br />C-0 to 83 inches; very gravelly fine sand <br />Minor Components <br />Water <br />Composition: About 10 percent <br />Landscape: Unspecified <br />Landform: Unspecified <br />Position on landform: Unspecified <br />Slope: 0 to 0 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Unspecified <br />Flooding hazard: Unspecified <br />Ecological site: Unspecified <br />Distinguishing characteristics: Unspecified <br />Davstyne and similar soils <br />Composition: About 2 percent <br />Landscape: Unspecified <br />Landform: Flood plains <br />Position on landform: Unspecified <br />Slope: 0 to 2 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Somewhat poorly drained <br />Flooding hazard: Very Rare <br />Ecological site: Unspecified <br />Distinguishing characteristics: Unspecified <br />Mesa and similar soils <br />Composition: About 2 percent <br />Landscape: Unspecified <br />Landform: Alluvial fans, fan remnants, <br />stream terraces, valley floors, outwash <br />terraces <br />Position on landform: Unspecified <br />Slope: 0 to 5 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Well drained <br />Flooding hazard: None <br />Ecological site: Loamy Saltdesert <br />Distinguishing characteristics: Unspecified <br />Nicolaudette and similar soils <br />Composition: About 2 percent <br />Landscape: Unspecified <br />Landform: Flood plains <br />Position on landform: Unspecified <br />Slope: 0 to 2 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Somewhat poorly drained <br />Flooding hazard: Very Rare <br />Ecological site: Riverbottom <br />Distinguishing characteristics: Unspecified <br />Fluvaquents and similar soils <br />Composition: About 2 percent <br />Landscape: Unspecified <br />Landform: Flood plains <br />Position on landform: Unspecified <br />Slope: 0 to 2 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Very poorly drained <br />Flooding hazard: Very Rare <br />Ecological site: Riverbottom <br />Distinguishing characteristics: Unspecified <br />Torrifluvents and similar soils <br />Composition: About 2 percent