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r � <br /> Map Unit Description:Wet alluvial land--Adams County Area,Parts of Adams and Denver Tucson South <br /> Counties,Colorado <br /> Adams County Area, Parts of Adams and Denver <br /> Counties, Colorado <br /> Wt—Wet alluvial land <br /> Map Unit Setting <br /> National map unit symbol: 34xj <br /> Elevation: 4,000 to 5,600 feet <br /> Mean annual precipitation: 12 to 14 inches <br /> Mean annual air temperature: 48 to 52 degrees F <br /> Frost-free period: 125 to 155 days <br /> Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> Wet alluvial land: 100 percent <br /> Estimates are based on observations, descriptions, and transects of <br /> the mapunit. <br /> Description of Wet Alluvial Land <br /> Setting <br /> Landform: Flood plains <br /> Landform position (three-dimensional): Talf <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Alluvium derived from mixed <br /> Typical profile <br /> H1 -0 to 8 inches: variable <br /> H2- 8 to 36 inches: stratified sandy loam to clay <br /> H3-36 to 60 inches: sand <br /> Properties and qualities <br /> Slope: 0 to 1 percent <br /> Natural drainage class: Poorly drained <br /> Runoff class: Very high <br /> Capacity of the most limiting layer to transmit water(Ksat). <br /> Moderately low to high (0.06 to 6.00 in/hr) <br /> Depth to water table: About 6 to 24 inches <br /> Frequency of flooding: Frequent <br /> Calcium carbonate, maximum in profile. 15 percent <br /> Salinity, maximum in profile. Nonsaline to very slightly saline (0.0 <br /> to 2.0 mmhos/cm) <br /> Available water storage in profile: Low(about 4.8 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): 5w <br /> Land capability classification (nonirrigated): 5w <br /> Hydrologic Soil Group: D <br /> Ecological site. Wet Meadow(R067BY038CO) <br /> usDA Natural Resources Aggregate Industries Tucson South Permit Amendment 10/18/2018 <br /> Conservation Service Page 1-5 Page 1 of 2 <br />