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Map Unit Description—Weld County,Colorado,Northern Part Koskie Pit 2020 Amendment <br /> Other vegetative classification. OVERFLOW(067BY036CO) <br /> Hydric soil rating: No <br /> Minor Components <br /> Nunn <br /> Percent of map unit: 6 percent <br /> Hydric soil rating: No <br /> Fluvaquentic haplustolls <br /> Percent of map unit: 4 percent <br /> Landform: Terraces <br /> Hydric soil rating: Yes <br /> 40—Nunn loam, 0 to 6 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: 2tlpt <br /> Elevation: 4,500 to 6,200 feet <br /> Mean annual precipitation: 13 to 17 inches <br /> Mean annual air temperature: 50 to 54 degrees F <br /> Frost-free period. 135 to 160 days <br /> Farmland classification: Prime farmland if irrigated <br /> Map Unit Composition <br /> Nunn and similar soils: 85 percent <br /> Minor components: 15 percent <br /> Estimates are based on observations, descriptions, and transects of <br /> the mapunit. <br /> Description of Nunn <br /> Setting <br /> Landform: Terraces, alluvial fans <br /> Landform position (three-dimensional): Tread <br /> Down-slope shape: Linear <br /> Across-slope shape: Linear <br /> Parent material: Pleistocene aged alluvium and/or eolian deposits <br /> Typical profile <br /> Ap- 0 to 6 inches: loam <br /> Bt1 - 6 to 10 inches: clay loam <br /> Bt2- 10 to 26 inches: clay loam <br /> Btk-26 to 31 inches. clay loam <br /> Bk-31 to 80 inches: clay loam <br /> Properties and qualities <br /> Slope: 0 to 6 percent <br /> Depth to restrictive feature: More than 80 inches <br /> Natural drainage class: Well drained <br /> Runoff class. Medium <br /> Capacity of the most limiting layer to transmit water(Ksat): <br /> Moderately low to moderately high (0.06 to 0.20 in/hr) <br /> USDA Natural Resources Web Soil Survey 3/24/2020 <br /> Conservation Service National Cooperative Soil Survey Page 5 of 8 <br />