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Map Unit Description: Alderwood-Urban land complex, 2 to 8 percent slopes --Snohomish <br />County Area, Washington <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 <br />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 <br />low to moderately 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 />Forage suitability group: 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 />USDA Natural Resources Web Soil Survey 1/29/2019 <br />Conservation Service National Cooperative Soil Survey Page 1 of 2 <br />