Every parcel of land is rated according to its Soil Slippage Potential for slippage. The soil types listed below have Medium or High slippage potential, which are categories based on the dominant geologic parent material, drainage class, textural family, and slope gradient. In each group, the identifying symbols consist of combinations of letters and numbers that indicate the type of soil and percent slope gradient. Both soil type and degree of slope are those identified and described in National Resources Conservation Services (NRCS) Web Soil Survey for Washington County, available at https://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm. The City Engineer may also use additional sources and types of information to identify areas of Medium or High potential. These may include, but are not limited to, such physical properties as bedrock geology, hydrogeology, and vegetation, in addition to soils and slope, plus any prior experience of slippage on the same property or nearby.
LANDSLIP/SOIL SLIPPAGE POTENTIAL CATEGORIES.
MEDIUM
GkC Gilpin-Summitville-Upshur complex, 6 to 12 percent slopes
HkE Hayter-Vandalia channery loams, 12 to 25 percent slopes
LiC 1 D2 Licking silt loam, 12 to 18 percent slopes, eroded
MbC Markland silt loam, 6 to 12 percent slopes
UpC Upshur silty clay loam, 6 to 12 percent slopes
VaC Vandalia silty clay loam, 6 to 12 percent slopes
Vin 1 C 1 Vincent silt loam, 6 to 12 percent slopes
Yin1D1 Vincent silt loam, 12 to 18 percent slopes
WrF Wheeling silt loam, 18 to 35 percent slopes
WtC Woodsfield silt loam, 6 to 12 percent slopes
WzC Woodsfield-Zanesville silt loams, 6 to 12 percent slopes
ZnC Zanesville silt loam, 6 to 12 percent slopes
HIGH
DkF Dekalb loam, 25 to 35 percent slopes
DsG Dekalb and Gilpin stony soils, 25 to 70 percent
GkD Gilpin-Summitville-Upshur complex, 12 to 18 percent slopes
GkE Gilpin-Summitville-Upshur complex, 18 to 25 percent slopes
GkF Gilpin-Summitville-Upshur complex, 25 to 35 percent slopes
GlG Gilpin-Summitville-Upshur complex, 35 to 70 percent slopes, benched
HgF Hayter loam, 25 to 35 percent slopes
HkF Hayter-Vandaila stony complex, 25 to 50 percent slopes
MbG Markland silt loam, 18 to 50 percent slopes
UpD Upshur silty clay loam, 12 to 18 percent slopes
UpE Upshur silty clay loam, 15 to 25 percent slopes
UrD3 Upshur clay, 12 to 18 percent slopes, severely eroded
UsF Upshur-Gilpin complex, 25 to 35 percent slopes
UTG Upshur association, very stony, 25 to 70 percent slopes
VaD Vandalia silty clay loam, 12 to 18 percent slopes
VaE Vandalia silty clay loam, 18 to 25 percent slopes
VaF Vandalia silty clay loam, 25 to 35 percent slopes
(Ord. 281(22-23). Passed 6-15-23.)