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76 <br />Sandwash and similar soils <br />Composition: About 6 percent <br />Hateron and similar soils <br />Composition: About 6 percent <br />70-Fluvaquents and Haplaquolls soils, <br />frequently flooded <br />Map Unit Setting <br />Major Land Resource Area: 34 <br />Elevation: 5,900 to 8,000 feet (1,798 to 2,438 meters) <br />Mean annual precipitation: 11 to 18 inches (279 to <br />457 millimeters) <br />Mean annual air temperature: 40 to 45 degrees F. <br />(4.4 to 7.2 degrees C.) <br />Freeze-free period. 65 to 85 days <br />Map Unit Composition <br />Fluvaquents and similar soils: 50 percent <br />Haplaquolls and similar soils: 45 percent <br />Minor components: 5 percent <br />Component Descriptions <br />Fluvaquents soils <br />Landform: Depressions on stream terraces, flood <br />plains <br />Parent material. Alluvium derived from mixed sources <br />Slope: 0 to 1 percent <br />Drainage class: Very poorly drained . <br />Slowest permeability: 0.2 to 0.6 in./hr. (moderately <br />slow) <br />Available water capacity: About 7.1 inches (moderate) <br />Shrink-swell potential: About 1.5 percent (tow) <br />Flooding hazard..- Frequent <br />Seasonal high wafer table depth: About 0 to 0 inches <br />Runoff class: Very tow <br />Calcium carbonate maximum: About 10 percent <br />Gypsum maximum: None <br />Salinity maximum: About 0 mmhos/cm (nonsaline) <br />Sodium adsorption ratio maximum: About O <br />(nonsodic) <br />Potential native vegetation: cattail, rush, sedge, <br />willow, common reed, reed aanarygrass <br />Land capability subclass (noninigated): 6w <br />Typical Profile: <br />0 to 4 inches; sandy loam <br />4 to 60 inches; stratified sand to clay <br />Soil Survey <br />Haplaquolls soils <br />Landform: Oxbows on flood plains, depressions on <br />stream terraces <br />Parent material.:. Alluvium derived from mixed sources <br />Slope: 0 to 1 percent <br />Drainage class: Very poorly drained <br />Slowest permeability. 0.2 to 0.6 Whr. (moderately <br />slow) <br />Available water capacity: About 6.6 inches (moderate) <br />Shrink-swell potential About 0.5 percent (low) <br />Flooding hazard. Frequent <br />Seasonal high water table depth: About 0 to 0 inches <br />Runoff class. Negligible <br />Calcium carbonate. maximum: About 5 percent <br />Gypsum maximum: None <br />Salinity maximum: About 0 mmhos/cm (nonsaline) <br />Sodium adsorption ratio maximum: About 0 <br />(nonsodic) <br />Potential native vegetation: cattail, rush, sedge, <br />willow <br />Land capability subclass (nonirrigated): 6w <br />Typical Profile: <br />0 to 6 inches; clay loam <br />6 to 14 inches; clay loam <br />14 to 21 inches; fine sandy loam <br />.21 to 34 inches; sandy clay loam <br />34 to 44 inches; sand <br />44 to 60 inches; extremely gravelly sand <br />Figure 12. Map Unit 70, Fluvaquents and Haplaquolls soils, <br />frequently flooded, provides valuable wetland wildlife <br />habitat.