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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 55C Elioak loam 7 - 15% SOIL CHARACTERISTICS Very deep, well drained, micaceous, dark red clayey soils on undulating summits and strongly sloping backslopes; developed in residuum from micaceous acid crystalline rocks 55C3 SEE MAP UNIT 55C 55D SEE MAP UNIT 33D 55D3 SEE MAP UNIT 33D 56B** Moderately deep, somewhat excessively drained, olive gray silty soils containing more Watt silt loam than 35% rock fragments on gently sloping summits and backslopes; developed in 2 - 7% residuum from black graphitic schist 56C** Watt silt loam 7-15% 56D Watt silt loam 15 - 25% 56E Watt silt loam 25-45% Moderately deep, somewhat excessively drained, olive gray silty soils containing more than 35% rock fragments on sloping summits and backslopes; developed in residuum from black graphitic schist Moderately deep, somewhat excessively drained, olive gray silty soils containing more than 35% rock fragments on strongly sloping through very steep backslopes and strongly sloping summits; developed in residuum from black graphitic schist Moderately deep, somewhat excessively drained, olive gray silty soils containing more than 35% rock fragments on steep to very steep backslopes; developed in residuum from black graphitic schist EROSION HAZARD K Factor (surface/subsoil) HYDROLOGIC GROUP High 0.37, 0.32 B Moderate 0.32, 0.20 B High 0.32, 0.20 B Very High 0.32, 0.20 B Very high 0.32, 0.20 B USE POTENTIAL AND PROBLEMS FOR SELECTED USES GENERAL DEVELOPMENT USING CENTRAL WATER AND CENTRAL SEWER GOOD high mica content in substratum may interfere with compaction Bearing Capacity: moderate Shrink-swell Potential: moderate FAIR shallow to rock; high silt content (low bearing capacity); high corrosivity to steel and concrete Bearing Capacity: low Shrink-swell Potential: low FAIR shallow to rock; high silt content (low bearing capacity); high corrosivity to steel and concrete Bearing Capacity: low Shrink-swell Potential: low POOR shallow to rock; steep slopes; high silt content (low bearing capacity); high corrosivity to steel and concrete Bearing Capacity: low Shrink-swell Potential: low VERY POOR shallow to rock; steep slopes; high silt content (low bearing capacity); high corrosivity to steel and concrete Bearing Capacity: low Shrink-swell Potential: low DEVELOPMENT USING CONVENTIONAL SEPTIC TANK AND DRAINFIELD AGRICULTURE GOOD SECONDARY CROPLAND MARGINAL shallow to rock POOR shallow to rock POOR shallow to rock steep slopes NOT SUITED shallow to rock very steep slopes SECONDARY CROPLAND SECONDARY CROPLAND PRIME PASTURE SECONDARY PASTURE FORESTRY (HARDWOOD) MODERATELY HIGH LOW LOW LOW LOW LAND USE CAPABILITY CLASS IIIe IVe

Table. Summary of Soil Characteristics and Use Potential (**-- not part of official soil survey) MAP. UNIT SYMBOL SOIL NAME SLOPE 56F Watt silt loam 45 - 65% SOIL CHARACTERISTICS Moderately deep, somewhat excessively drained, olive gray silty soils containing more than 35% rock fragments on very steep backslopes; developed in residuum from black graphitic schist 57B SEE MAP UNIT 55B 57C SEE MAP UNIT 55C 58B SEE MAP UNIT 53C 58C SEE MAP UNIT 53C 58D SEE MAP UNIT 53D 58E SEE MAP UNIT 33E 59B** Mongle loam, rubbly 2 - 7% 59C Mongle loam, rubbly 7 - 15% 60A** Ott-Catlett complex 0 - 3% Very deep, somewhat poorly drained, yellowish brown loamy soils with high water tables in concave landscapes, along small drainageways and on alluvial fans; developed in recent colluvium/alluvium washed from basic and acidic rocks; 15 – 50 % cobbles, stones and/or boulders cover the soil surface; may have HYDRIC soil inclusions Very deep, somewhat poorly drained, yellowish brown loamy soils with high water tables in concave landscapes, along small drainageways and on alluvial fans; developed in recent colluvium/alluvium washed from basic and acidic rocks; 15 – 50 % cobbles, stones and/or boulders cover the soil surface; may have HYDRIC soil inclusions Complex of moderately deep, well drained, dark yellowish brown (Ott) soil and shallow, well drained, loamy-skeletal, dark gray (Catlett) soils containing more than 35% rock fragments on summits and gently sloping backslopes; developed in residuum from bluish-gray thermally altered Triassic shale EROSION HAZARD K Factor (surface/subsoil) HYDROLOGIC GROUP Very high 0.32, 0.20 D Moderate 0.43, 0.43 D Moderate 0.43, 0.43 D Slight 0.32, 0.10 C USE POTENTIAL AND PROBLEMS FOR SELECTED USES GENERAL DEVELOPMENT USING CENTRAL WATER AND CENTRAL SEWER VERY POOR shallow to rock; steep slopes; high silt content (low bearing capacity); high corrosivity to steel and concrete Bearing Capacity: low Shrink-swell Potential: low VERY POOR high water table; overland flowsignificant destructive potential during storm events Bearing Capacity: low Shrink-swell Potential: moderate VERY POOR high water table; overland flowsignificant destructive potential during storm events Bearing Capacity: low Shrink-swell Potential: moderate FAIR shallow to rock Bearing Capacity: Shrink-swell Potential: DEVELOPMENT USING CONVENTIONAL SEPTIC TANK AND DRAINFIELD NOT SUITED shallow to rock very steep slopes NOT SUITED high water table NOT SUITED high water table NOT SUITED shallow to rock AGRICULTURE FORESTRY (HARDWOOD) NOT SUITED LOW NOT SUITED MODERATELY LOW NOT SUITED MODERATELY LOW SECONDARY CROPLAND LOW LAND USE CAPABILITY CLASS VIIs

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