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Map Unit Description:Terrace escarpments--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 /> Tc—Terrace escarpments <br /> Map Unit Setting <br /> National map unit symbol: 34ws <br /> Elevation: 4,400 to 5,500 feet <br /> Mean annual precipitation: 12 to 14 inches <br /> Mean annual air temperature: 46 to 54 degrees F <br /> Frost-free period. 120 to 160 days <br /> Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> Terrace escarpments: 90 percent <br /> Minor components: 10 percent <br /> Estimates are based on observations, descriptions, and transects of <br /> the mapunit. <br /> Description of Terrace Escarpments <br /> Setting <br /> Landform: Terraces <br /> Landform position (three-dimensional): Riser <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Alluvium derived from mixed <br /> Typical profile <br /> H1 -0 to 3 inches: gravelly sand <br /> H2-3 to 60 inches: gravelly sand <br /> Interpretive groups <br /> Land capability classification (irrigated): None specified <br /> Land capability classification (nonirrigated): 7s <br /> Hydrologic Soil Group: A <br /> Ecological site: Gravel Breaks(R067BY063CO) <br /> Hydric soil rating. No <br /> Minor Components <br /> Vona <br /> Percent of map unit: 5 percent <br /> Hydric soil rating: No <br /> Dacono <br /> Percent of map unit: 5 percent <br /> usDA Natural Resources Aggregate Industries Tucson South Permit Amendment 10/18/2018 <br /> Conservation Service Page 1-10 Page 1 of 2 <br />