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Map Unit Description:Loamy alluvial land,gravelly substratum—Adams County Area,Parts of Tucson South <br /> Adams and Denver Counties,Colorado <br /> Adams County Area, Parts of Adams and Denver <br /> Counties, Colorado <br /> Lv—Loamy alluvial land, gravelly substratum <br /> Map Unit Setting <br /> National map unit symbol: 34w4 <br /> Elevation: 4,000 to 8,500 feet <br /> Mean annual precipitation: 12 to 14 inches <br /> Mean annual air temperature: 45 to 52 degrees F <br /> Frost-free period: 75 to 150 days <br /> Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> Loamy alluvial land. 75 percent <br /> Minor components: 25 percent <br /> Estimates are based on observations, descriptions, and transects of <br /> the mapunit. <br /> Description of Loamy Alluvial Land <br /> Setting <br /> Landform: Drainageways <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Alluvium derived from mixed <br /> Typical profile <br /> H1 - 0 to 20 inches: loam <br /> H2-20 to 60 inches: stratified very gravelly sand to clay <br /> Properties and qualities <br /> Slope: 0 to 2 percent <br /> Natural drainage class: Somewhat excessively drained <br /> Runoff class: Very low <br /> Capacity of the most limiting layer to transmit water(Ksat): <br /> Moderately high to high (0.57 to 5.95 in/hr) <br /> Frequency of flooding: Occasional <br /> Calcium carbonate, maximum in profile: 2 percent <br /> Salinity, maximum in profile: Nonsaline to slightly saline (0.0 to 4.0 <br /> mmhos/cm) <br /> Sodium adsorption ratio, maximum in profile. 2.0 <br /> Available water storage in profile: Low(about 4.8 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): 4w <br /> Land capability classification (nonirrigated): 6w <br /> Hydrologic Soil Group: A <br /> Hydric soil rating: No <br /> USDA Natural Resources Aggregate Industries Tucson South Permit Amendment 10/18/2018 <br /> Conservation Service Page 1-15 Page 1 of 2 <br />