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Custom Soil Resource Report <br /> Snohomish County Area, Washington <br /> 5—Alderwood-Urban land complex, 2 to 8 percent slopes <br /> Map Unit Setting <br /> National map unit symbol: 2hz9 <br /> Elevation: 50 to 800 feet <br /> Mean annual precipitation: 25 to 60 inches <br /> Mean annual air temperature: 48 to 52 degrees F <br /> Frost-free period: 180 to 220 days <br /> Farmland classification: Not prime farmland <br /> Map Unit Composition <br /> Alderwood and similar soils. 60 percent <br /> Urban land: 25 percent <br /> Minor components: 15 percent <br /> Estimates are based on observations, descriptions, and transects of the mapunit. <br /> Description of Alderwood <br /> Setting <br /> Landform: Till plains <br /> Parent material: Basal till <br /> Typical profile <br /> H1 -0 to 7 inches: gravelly ashy sandy loam <br /> H2- 7 to 35 inches: very gravelly ashy sandy loam <br /> H3-35 to 60 inches: gravelly sandy loam <br /> Properties and qualities <br /> Slope: 2 to 8 percent <br /> Depth to restrictive feature: 20 to 40 inches to densic material <br /> Natural drainage class: Moderately well drained <br /> Capacity of the most limiting layer to transmit water(Ksat): Very low to moderately <br /> low(0.00 to 0.06 in/hr) <br /> Depth to water table: About 18 to 36 inches <br /> Frequency of flooding: None <br /> Frequency of ponding: None <br /> Available water storage in profile: Low(about 3.0 inches) <br /> Interpretive groups <br /> Land capability classification (irrigated): None specified <br /> Land capability classification (nonirrigated): 4s <br /> Hydrologic Soil Group: B <br /> Other vegetative classification: Limited Depth Soils (G002XN302WA) <br /> Hydric soil rating: No <br /> Minor Components <br /> Mckenna <br /> Percent of map unit. 5 percent <br /> Landform: Depressions <br /> Other vegetative classification: Wet Soils (G002XN102WA) <br /> Hydric soil rating: Yes <br /> 13 <br />