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Gas creek <br />Percent of map unit:5 percent <br />Landforni lood plains <br />Down -slope shape:Linear <br />Across -slope shape:Linear <br />Gold creek <br />Percent of map unit:5 percent <br />Landforin lood plains <br />Down -slope shape:Linear <br />Across -slope shape:Linear <br />Irim <br />Percent of map unit:5 percent <br />Landform:Flood plains <br />Down -slope shape:Linear <br />Across -slope shape:Linear <br />EvB— Evanston loam, 1 to 5 percent slopes <br />Map Unit Setting <br />Elevation:8,000 to 10,000 feet <br />Frost -free period:50 to 70 days <br />Map Unit Composition <br />Evanston and similar soils:90 percent <br />Minor components:3 percent <br />Description of Evanston <br />Setting <br />LandforniNalleys, alluvial fans <br />Down -slope shape:Linear <br />Across -slope shape:Linear <br />Parent material:Rhyolitic alluvium derived from tuff and/or alluvium derived from <br />rhyolite and/or alluvium derived from sandstone <br />Properties and qualities <br />Slope:1 to 5 percent <br />Depth to restrictive feature:More than 80 inches <br />Drainage class: Well drained <br />Capacity of the most limiting layer to transmit water (Ksat):Moderately high (0.20 to <br />0.60 in/hr) <br />Depth to water table:More than 80 inches <br />Frequency of flooding:None <br />Frequency of ponding:None <br />Calcium carbonate, maximum content: 15 percent <br />Available water capacity:High (about 9.3 inches) <br />Interpretive groups <br />Land capability classification (irrigated):5c <br />Land capability (nonirrigated):6c <br />Ecological site:Mountain Outwash (R048AY28 1 CO) <br />Typical profile <br />Tomichi Pit, December 2013 I -2 <br />