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INTERPRETIVE GUIDE TO THE SOILS - Fauquier County

INTERPRETIVE GUIDE TO THE SOILS - Fauquier County

Table. Summary of Soil

Table. Summary of Soil Characteristics and Use Potential (**-- not part of official soil survey) MAP. UNIT SYMBOL SOIL NAME SLOPE 173B** Penn gravelly silt loam (WET PHASE) 3 - 8% 173C** Penn gravelly silt loam (WET PHASE) 8 - 15% 174B** Ashburn very gravelly silt loam 3 - 8% 175B** Casanova very gravelly silt loam 2 - 7% 176B** Oatlands very gravelly silt loam; (WET PHASE) 3 - 8% SOIL CHARACTERISTICS Moderately deep, moderately well drained, reddish-brown silty soils on summits and gently sloping backslopes, developed in residuum from Triassic siltstone and shale Moderately deep, moderately well drained, reddish-brown silty soils on summits and gently sloping backslopes, developed in residuum from Triassic siltstone and shale Moderately deep, moderately well drained, yellowish-brown silty soils with intermittent high water tables on level to gently sloping landscapes; developed from thin fluvial cappings over Triassic siltstone Very deep, well drained, red to dark red clayey soils on gently sloping ridgetops; developed in residuum from Triassic siltstone and conglomerate Moderately deep, moderately well drained, strong brown to reddish-brown loamy soils on rolling uplands; developed in residuum from Triassic siltstone and conglomerate EROSION HAZARD K Factor (surface/subsoil) HYDROLOGIC GROUP Moderate 0.37, 0.24 C Moderate 0.37, 0.24 C Moderate 0.37, 0.24 C Moderate 0.37, 0.28 B Moderate 0.32, 0.15 C USE POTENTIAL AND PROBLEMS FOR SELECTED USES GENERAL DEVELOPMENT USING CENTRAL WATER AND CENTRAL SEWER FAIR intermittent high water table; shallow to rock Bearing Capacity: low Shrink-swell Potential: low FAIR intermittent high water table; shallow to rock Bearing Capacity: low Shrink-swell Potential: low FAIR intermittent high water table; low bearing capacity when wet; very gravelly surface Bearing Capacity: low Shrink-swell Potential: moderate FAIR very gravelly surface Bearing Capacity: moderate Shrink-swell Potential: moderate FAIR intermittent high water table; shallow to rock; very gravelly surfaces Bearing Capacity: low Shrink-swell Potential: low DEVELOPMENT USING CONVENTIONAL SEPTIC TANK AND DRAINFIELD POOR intermittent high water table shallow to rock POOR intermittent high water table shallow to rock POOR shallow to rock intermittent high water table MARGINAL percs slowly POOR intermittent high water table shallow to rock AGRICULTURE SECONDARY CROPLAND SECONDARY CROPLAND PRIME PASTURE SECONDARY CROPLAND PRIME PASTURE FORESTRY (HARDWOOD) MODERATEY LOW MODERATEY LOW MODERATELY LOW MODERATE MODERATELY LOW LAND USE CAPABILITY CLASS

Table. Summary of Soil Characteristics and Use Potential (**-- not part of official soil survey) MAP. UNIT SYMBOL SOIL NAME SLOPE 178A** Dulles Variant silt loam 0 - 3% 178B** Dulles Variant silt loam 3 - 8% 179A** Albano Variant silt loam 0 - 3% 181B** Brumbaugh loam; very stony 2 - 7% 183B** Braddock gravelly loam 2 - 7% SOIL CHARACTERISTICS Moderately deep, somewhat poorly drained, yellowish-brown mottled with gray loamy soils with intermittent high water tables in concave landscapes (swales) and drainageways; developed in local alluvium washed from Triassic uplands; may have HYDRIC soil inclusions Moderately deep, somewhat poorly drained, yellowish-brown mottled with gray loamy soils with intermittent high water table water tables in concave landscapes (swales) and drainageways; developed in local alluvium washed from Triassic uplands; may have HYDRIC soil inclusions Moderately deep, poorly drained, gray loamy soils with high water tables in concave landscapes (swales) and drainageways; developed in local alluvium washed from Triassic uplands; HYDRIC soil Very deep, moderately well drained, yellowish-brown loamy soils on footslopes and toeslopes of mountains and in broad gently sloping interfluves; semi-rounded stones make up 5-50% of the soil surface; 0.1–3% stones cover the soil surface; developed in old mountain colluvium from mixed acidic and basic rocks Very deep, well drained, reddish-brown clayey soils on footslopes, broad summits and gently sloping backslopes; rounded stones make up 0 - 50% of the soil mass; developed in old colluvium from mixed acidic and basic rocks EROSION HAZARD K Factor (surface/subsoil) HYDROLOGIC GROUP Slight 0.37, 0.32 D Moderate 0.37, 0.32 D Slight 0.37, 0.32 D Moderate 0.28, 0.20 C Moderate 0.28, 0.28 B USE POTENTIAL AND PROBLEMS FOR SELECTED USES GENERAL DEVELOPMENT USING CENTRAL WATER AND CENTRAL SEWER VERY POOR may be within 100-year floodplain; high water table; low relief; low bearing capacity when wet due to high silt content Bearing Capacity: low Shrink-swell Potential: low VERY POOR may be within 100-year floodplain; high water table; low relief; low bearing capacity when wet due to high silt content Bearing Capacity: low Shrink-swell Potential: low VERY POOR may be within 100-year floodplain; high water table; low relief; low bearing capacity when wet due to high silt content in surface and shrink-swell clay in the subsoil Bearing Capacity: low Shrink-swell Potential: low FAIR intermittent high water table; stoniness Bearing Capacity: moderate Shrink-swell Potential: low GOOD Bearing Capacity: moderate Shrink-swell Potential: moderate DEVELOPMENT USING CONVENTIONAL SEPTIC TANK AND DRAINFIELD NOT SUITED high water table NOT SUITED high water table NOT SUITED high water table POOR high water table MARGINAL percs slowly AGRICULTURE PRIME PASTURE PRIME PASTURE SECONDARY PASTURE SECONDARY PASTURE PRIME CROPLAND FORESTRY (HARDWOOD) MODERATE MODERATE MODERATELY LOW MODERATELY LOW MODERATE LAND USE CAPABILITY CLASS

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