10105 1ST DR SE 2021-12-14 - Laserfiche WebLink

0 AE CONSTRUCTION SFR Snohomish County Area, Washington 5—Alderwood-Urban land complex, 2 to 8 percent slopes Map Unit Setting • National map unit symbol: 2hz9 • Elevation: 50 to 800 feet • Mean annual precipitation: 25 to 60 inches . • Mean annual air temperature: 48 to 52 degrees F • Frost -free period: 180 to 220 days Farmland classification: Not prime farmland Map Unit Composition Alderwood and similar soils: 60 percent • Urban land: 25 percent • Minor components: 15 percent • Estimates are based on observations, descriptions, and transects of the mapunit. Description of Alderwood Setting • Landform: Till plains • Parent material: Basal till Typical profile • H1 - 0 to 7 inches: gravelly ashy sandy loam H2 - 7 to 35 inches: very gravelly ashy sandy loam • H3 - 35 to 60 inches: gravelly sandy loam Properties and qualities • Slope: 2 to 8 percent Depth to restrictive feature: 20 to 40 inches to densic material • Natural drainage class: Moderately well drained Capacity of the most limiting layer to transmit water (Ksat): Very low to moderately low (0.00 to 0.06 in/hr) • Depth to water table: About 18 to 36 inches • Frequency of flooding: None • Frequency of ponding: None Available water storage in profile: Low (about 3.0 inches) Interpretive groups • Land capability classification (irrigated): None specified • Land capability classification (nonirrigated): 4s • Hydrologic Soil Group: B • Forage suitability group: Limited Depth Soils (G002XN302WA) • Hydric soil rating: No • Minor Components Mckenna • Percent of map unit: 5 percent • Landform: Depressions • Hydric soil rating: Yes Norma, undrained • Percent of map unit: 5 percent • Landform: Depressions • Hydric soil rating: Yes Terric medisaprists, undrained • Percent of map unit: 5 percent • Landform: Depressions • Hydric soil rating: Yes WESTERN ENGINEERS, INC. 25 PROJECT: 19-1821-A