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Map Unit Description— Ridgway Area, Colorado, Parts of Delta, Gunnison, <br />Montrose, and Ouray Counties <br />USDA Natural Resources <br />Conservation Service <br />1 to 3 inches: Silty clay <br />3 to 23 inches: Extremely paragravelly silty clay <br />Description of Ustic Hapiargids <br />Setting <br />Landform: Hillsiopes <br />Landform position (two- dimensional): Footslope, backslope <br />Parent material: Gravelly and cobbly glaciofluvial deposits derived <br />from igneous, metamorphic and sedimentary rock over residuum <br />weathered from calcareous shale <br />Properties and qualities <br />Slope: 15 to 65 percent <br />Surface area covered with cobbles, stones or boulders: 2.0 percent <br />Depth to restrictive feature: 40 inches to bedrock (paralithic) <br />Drainage class: Well drained <br />Capacity of the most limiting layer to transmit water <br />(Ksat): Moderately low to moderately high (0.06 to 0.20 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: 14 percent <br />Gypsum, maximum content: 2 percent <br />Maximum salinity: Nonsaline to slightly saline (0.0 to 8.0 mmhos /cm) <br />Sodium adsorption ratio, maximum: 3.0 <br />Available water capacity: Moderate (about 7.8 inches) <br />Interpretive groups <br />Land capability classification (irrigated): 7e <br />Land capability (nonirrigated): 7c <br />Ecological site: FOOTHILL JUNIPER (R034XY447C0) <br />Typical profile <br />0 to 7 inches: Very cobbly loam <br />7 to 12 inches: Very cobbly loam <br />12 to 26 inches: Very cobbly clay loam <br />26 to 34 inches: Very gravelly loam <br />34 to 39 inches: Silt loam <br />39 to 50 inches: Silty clay loam <br />50 to 62 inches: Silty clay loam <br />62 to 69 inches: Paragravelly clay loam <br />899 — Torriorthents, 10 to 75 percent slopes <br />Map Unit Setting <br />Elevation: 5,000 to 7,000 feet <br />Mean annual precipitation: 8 to 12 inches <br />Mean annual air temperature: 47 to 51 degrees F <br />Frost -free period: 125 to 160 days <br />Map Unit Composition <br />Torriorthents and similar soils: 70 percent <br />Minor components: 30 percent <br />Web Soil Survey <br />National Cooperative Soil Survey <br />10/27/2012 <br />Page 54 of 63 <br />