Map Unit Description: Philomath cobbly silty clay, 3 to 12 percent slopes---Lane County Area, <br />Oregon <br />Captial Hill - Tentative PUD <br />Lane County Area, Oregon <br />108C-Philomath cobbly silty clay, 3 to 12 percent slopes <br />Map Unit Setting <br />National map unit symbol: 233k <br />Elevation: 200 to 2,000 feet <br />Mean annual precipitation: 30 to 60 inches <br />Mean annual air temperature: 50 to 55 degrees F <br />Frost-free period: 160 to 235 days <br />Farmland classification: Not prime farmland <br />Map Unit Composition <br />Philomath and similar soils: 85 percent <br />Minor components: 4 percent <br />Estimates are based on observations, descriptions, and transects of <br />the mapunit. <br />Description of Philomath <br />Setting <br />Landform: Hills <br />Landform position (two-dimensional): Summit, shoulder <br />Landform position (three-dimensional): Crest, interfluve, nose <br />slope <br />Down-slope shape: Linear <br />Across-slope shape: Linear <br />Parent material: Colluvium and residuum derived from basic <br />igneous rock <br />Typical profile <br />H1 - 0 to 6 inches: cobbly silty clay <br />H2 - 6 to 14 inches: cobbly silty clay <br />H3 - 14 to 24 inches: weathered bedrock <br />Properties and qualities <br />Slope: 3 to 12 percent <br />Depth to restrictive feature: 12 to 20 inches to paralithic bedrock <br />Natural drainage class: Well drained <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 />Depth to water table: More than 80 inches <br />Frequency of flooding: None <br />Frequency of ponding: None <br />Available water storage in profile: Very low (about 2.2 inches) <br />Interpretive groups <br />Land capability classification (irrigated): None specified <br />Land capability classification (nonirrigated): 6s <br />Hydrologic Soil Group: D <br />Hydric soil rating: No <br />USDA Natural Resources Web Soil Survey 1/6/2017 <br />Conservation Service National Cooperative Soil Survey Page 1 of 2 <br />