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ADVANCED COPY SUBJECT TO CHANGE <br />• <br />849-Johmurray loam, 1 to 6 <br />percent slopes <br />Land capability subclass (irrigated): 4s <br />Land capability subclass (nonirrigated): 4s <br />• <br />• <br />Map Unit Setting <br />Major Land Resource Area: 48A <br />Elevation: 6,590 to 8,100 feet (2,010 to 2,470 <br />meters) <br />Mean annual precipitation: 14 to 20 inches (355 <br />to 508 millimeters) <br />Mean annual air temperature: 45 to 47 degrees <br />F. (7.2 to 8.3 degrees C.) <br />Freeze-free period: 110 to 130 days <br />Map Unit Composition <br />Johmurray and similar soils: 80 percent <br />Minor components: 20 percent <br />Component Descriptions <br />Johmurray soils <br />Landscape: Unspecified <br />Landform: Moraines, outwash fans, outwash <br />terraces, kames <br />Position on landform: Backslopes <br />Parent material. Glaciofluvial deposits derived <br />from mixed sources <br />Slope: 1 to 6 percent <br />Surface fragments: About 0 percent rounded <br />stones, about 2 percent rounded gravel, <br />about 2 percent rounded cobbles <br />Depth to restrictive feature: Greater than 60 <br />inches <br />Drainage class: Well drained <br />Slowest permeability: 0.2 to 0.6 in/hr <br />(moderately slow) <br />Available water capacity: About 3.7 inches (low) <br />Shrink-swell potential: About 0.0 percent (low) <br />Flooding hazard. None <br />Ponding hazard: None <br />Seasonal high water table depth: Greater than <br />60 inches <br />Runoff class: Medium <br />Calcium carbonate maximum: About 40 percent <br />Gypsum maximum: None <br />Salinity maximum: About 1 mmhos/cm <br />(nonsaline) <br />Sodium adsorption ratio maximum: About 0 <br />(nonsodic) <br />Relative effective annual precipitation: 14 to 16 <br />inches (355 to 406 millimeters) <br />Ecological site: Loamy Foothills <br />Potential native vegetation: muttongrass, <br />western wheatgrass, Wyoming big <br />sagebrush, black sagebrush, Indian <br />ricegrass, bottlebrush squirreltail, <br />needleandthread, prairie Junegrass, Utah <br />serviceberry, antelope bitterbrush, <br />DOUGLAS RABBITBRUSH, true mountain <br />mahogany <br />Typical Profile: <br />A1-0 to 4 inches; loam <br />A2-4 to 9 inches; loam <br />Bt-9 to 12 inches; gravelly loam <br />Btk1-12 to 17 inches; very cobbly clay loam <br />Btk2-17 to 23 inches; very gravelly loam <br />Bk-23 to 37 inches; extremely gravelly <br />sandy loam <br />C1-37 to 65 inches; extremely gravelly <br />loamy sand <br />2C2-65 to 75 inches; loamy sand <br />Minor Components <br />Mudcap and similar soils <br />Composition: About 5 percent <br />Landscape: Unspecified <br />Landform: Alluvial fans, outwash terraces <br />Position on landform: Backslopes <br />Slope: 1 to 6 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Somewhat poorly drained <br />Flooding hazard: None <br />Ecological site: Unspecified <br />Distinguishing characteristics: Unspecified <br />Yonder and similar soils <br />Composition: About 5 percent <br />Landscape: Unspecified <br />Landform: Outwash terraces, alluvial fans <br />Position on landform: Backslopes <br />Slope: 1 to 8 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Well drained <br />Flooding hazard: None <br />Ecological site: Clayey Foothills <br />Distinguishing characteristics: Unspecified <br />Selfwill and similar soils <br />Composition: About 5 percent <br />Landscape: Unspecified <br />Landform: Outwash terraces, alluvial fans <br />Position on landform: Backslopes <br />Slope: 1 to 8 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Well drained <br />Flooding hazard. None <br />Ecological site: Clayey Foothills <br />Distinguishing characteristics: Unspecified <br />Farkeli and similar soils <br />Composition: About 5 percent <br />Landscape: Unspecified <br />Landform: Outwash terraces, alluvial fans <br />Position on landform: Backslopes <br />Slope: 1 to 6 percent <br />Depth to restrictive feature: Unspecified <br />Drainage class: Well drained <br />Flooding hazard. None <br />Ecological site: Loamy Foothills <br />Distinguishing characteristics: Unspecified <br />DAD 12/05