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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 163B** Remington silt loam 3 - 8% 164B** Oakhill-Rock Outcrop complex 3 - 8% 164C Oakhill-Rock Outcrop complex 8 - 15% 164D Oakhill-Rock Outcrop complex 15 - 25% SOIL CHARACTERISTICS Deep, moderately well drained, yellowishbrown claypan soils with intermittent high water tables on gently sloping backslopes; developed in old alluvial capping underlain by residuum from thermally-altered Triassic shales and granulite; may have HYDRIC soil inclusions Moderately deep, well drained, yellowish-red loamy soils with more than 35% rock fragments in the soil mass and 10 – 25% rock outcrops on gently sloping the strongly sloping backslopes; soil surface is covered by 0.01 – 0.2% stones and cobbles; developed in residuum from basalt Moderately deep, well drained, yellowish-red loamy soils with more than 35% rock fragments in the soil mass and 10 – 25% rock outcrops on gently sloping the strongly sloping backslopes; soil surface is covered by 0.01 – 0.2% stones and cobbles; developed in residuum from basalt Moderately deep, well drained, yellowish-red loamy soils with more than 35% rock fragments in the soil mass and 10 – 25% rock outcrops on moderately steep and steep backslopes; soil surface is covered by 0.01 – 0.2% stones and cobbles; developed in residuum from basalt 165C3 SEE MAP UNIT 65C 167A** Very deep, well drained, dark brown clayey soils on nearly level summits; developed in Haymarket silt loam residuum from Triassic diabase and basalt 0 - 3% 167B Haymarket silt loam 3 - 8% Very deep, well drained, dark brown clayey soils on gently sloping summits and backslopes; developed in residuum from Triassic diabase and basalt EROSION HAZARD K Factor (surface/subsoil) HYDROLOGIC GROUP Moderate 0.37, 0.28 C Moderate 0.24, 0.28 C Moderate 0.24, 0.28 C High 0.24, 0.28 C Slight 0.32, 0.10 D Moderate 0.32, 0.10 D USE POTENTIAL AND PROBLEMS FOR SELECTED USES GENERAL DEVELOPMENT USING CENTRAL WATER AND CENTRAL SEWER VERY POOR high shrink-swell clay layers in the subsoil; intermittent high water table; low relief Bearing Capacity: low Shrink-swell Potential: very high VERY POOR rock outcrops; stones and boulders Bearing Capacity: moderate Shrink-swell Potential: low VERY POOR rock outcrops; stones and boulders Bearing Capacity: moderate Shrink-swell Potential: low VERY POOR rock outcrops; steep slopes Bearing Capacity: moderate Shrink-swell Potential: low POOR high shrink-swell clay in the subsoil Bearing Capacity: low Shrink-swell Potential: very high POOR high shrink-swell clay in the subsoil Bearing Capacity: low Shrink-swell Potential: very high DEVELOPMENT USING CONVENTIONAL SEPTIC TANK AND DRAINFIELD NOT SUITED high water table NOT SUITED rock outcrops shallow to rock stone content NOT SUITED rock outcrops shallow to rock stone content NOT SUITED steep slopes rock outcrops POOR percs slowly POOR percs slowly AGRICULTURE SECONDARY CROPLAND FORESTRY (HARDWOOD) MODERATE LAND USE CAPABILITY CLASS NOT SUITED LOW VIIs NOT SUITED LOW VIIs NOT SUITED LOW PRIME CROPLAND PRIME CROPLAND MODERATE MODERATE IIe IIe

Table. Summary of Soil Characteristics and Use Potential (**-- not part of official soil survey) MAP. UNIT SYMBOL SOIL NAME SLOPE SOIL CHARACTERISTICS 167C Very deep, well drained, red clayey soils and/or dark brown clayey soils on strongly Montalto and sloping backslopes; developed in residuum Haymarket soils from Triassic diabase and basalt- - - This map unit will predominantly contain Montalto 8 - 15% and/or Haymarket soils 169A SEE MAP UNIT 69A 170A** Deep, moderately well drained, strong brown loamy over clayey soils on nearly level Mt. Lucas Variant summits and footslopes; developed in loam 0 - 3% colluvium over residuum from basalt and diabase 170B** Mt. Lucas Variant loam 3 - 8% 171B** Panorama Variant very gravelly silt loam 2 – 7% 171C** Panorama Variant very gravelly silt loam 7 - 15% 173A** Penn gravelly silt loam (WET PHASE) 0 - 3% Deep, moderately well drained, strong brown loamy over clayey soils on nearly level summits and footslopes; developed in colluvium over residuum from basalt and diabase Deep, well drained, dark reddish-brown silty soils on broad gently sloping ridges; developed in residuum from red Triassic shale and sandstone Deep, well drained, dark reddish-brown silty soils on broad gently sloping ridges; developed in residuum from red Triassic shale and sandstone Moderately deep, moderately well drained, reddish-brown silty soils on ridgetops and upper sideslopes, developed in residuum from Triassic siltstone, shale and conglomerate EROSION HAZARD K Factor (surface/subsoil) HYDROLOGIC GROUP Moderate 0.32, 0.10 D Slight 0.37, 0.28 C Moderate 0.37, 0.28 C Moderate 0.37, 0.32 B Moderate 0.37, 0.32 B Slight 0.37, 0.24 C USE POTENTIAL AND PROBLEMS FOR SELECTED USES GENERAL DEVELOPMENT USING CENTRAL WATER AND CENTRAL SEWER POOR high shrink-swell clay in the subsoil Bearing Capacity: low Shrink-swell Potential: very high POOR intermittent high water table; shrinkswell clay in lower subsoil Bearing Capacity: low Shrink-swell Potential: high POOR intermittent high water table; shrinkswell clay in lower subsoil Bearing Capacity: low Shrink-swell Potential: high FAIR low bearing capacity when wet (high silt content), very gravelly surface Bearing Capacity: low Shrink-swell Potential: low FAIR low bearing capacity when wet (high silt content); very gravelly surface Bearing Capacity: low Shrink-swell Potential: low FAIR intermittent high water table; shallow to rock Bearing Capacity: low Shrink-swell Potential: low DEVELOPMENT USING CONVENTIONAL SEPTIC TANK AND DRAINFIELD MARGINAL percs slowly NOT SUITED high water table NOT SUITED high water table MARGINAL percs slowly MARGINAL percs slowly POOR intermittent high water table shallow to rock AGRICULTURE SECONDARY CROPLAND SECONDARY CROPLAND SECONDARY CROPLAND SECONDARY CROPLAND SECONDARY CROPLAND SECONDARY CROPLAND FORESTRY (HARDWOOD) MODERATE MODERATE MODERATE MODERATE MODERATE MODERATELY LOW LAND USE CAPABILITY CLASS

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