USDA SSURGO COUNTY SOIL REFERENCE

Jefferson County, Kentucky Soil Summary

This page summarizes USDA SSURGO mapped soil information for Jefferson County, Kentucky.

Mapped Land Coverage
99.92%254,273.55 mapped acres of 254,464.53 Census land acres

Coverage measures mapped SSURGO intersection with Census land geometry. It does not mean that every parcel or point has complete soil information.

Soil at a Glance

Largest mapped soil unit
Montevallo-Nauvoo association, 6 to 45 percent slopes
Symbol: 291.48% of mapped area
Largest estimated component
Rock outcrop
10,127.29 acres (3.98% of mapped area)
Mapped units & components
15 soil units • 15 component series
Distinct SSURGO map units & series
Dominant drainage class
Well drained
Highest acreage drainage class
Dominant hydrologic group
Group D
Runoff potential classification
Weighted average slope
16.21%
Terrain slope analysis
Looking at a specific U.S. address?

Check soil and other available public land data for a U.S. address

County summaries provide regional context across mapped soil units. Address lookup combines available public datasets for the Census-matched location.

Mapped SSURGO Soil Units

Largest mapped soil units in Jefferson County ranked by intersected vector acreage
SymbolMap Unit NameMapped Acres% of Mapped Area
29Montevallo-Nauvoo association, 6 to 45 percent slopes3,763.071.48%
WWater3,082.371.21%
CrACrowley-Vidrine complex, 0 to 1 percent slopes2,111.190.83%
26Perry clay, 0 to 1 percent slopes2,037.140.8%
ZwBZaneis-Pawhuska complex, 0 to 3 percent slopes2,001.210.79%
ZvDZaneis, Lucien, and Grainola soils, 5 to 12 percent slopes1,527.750.6%
CQRock outcrop, cirques, 40 to 80 percent slopes1,251.380.49%
41EBerks-Weikert complex, 35 to 60 percent slopes1,189.030.47%
46Sphinx-Rock outcrop complex, 15 to 80 percent slopes1,163.150.46%
290BLeighcan family, till substratum, 5 to 40 percent slopes1,161.70.46%
922AMoran family-Rock outcrop-Teewinot family complex, 40 to 80 percent slopes1,149.940.45%
704SLeighcan-Endlich families complex, 40 to 60 percent slopes1,129.980.44%
73201Sonsac gravelly silt loam, 15 to 40 percent slopes, very stony1,114.090.44%
367BScout-Angostura families complex, 5 to 40 percent slopes1,108.960.44%
33Rilla silt loam, 0 to 1 percent slopes1,094.10.43%

Estimated Soil Components

Component acreage estimated from SSURGO component percentages
ComponentDrainage ClassHydrologic GroupEstimated Acres% of Mapped Area
Rock outcropUnspecifiedD10,127.293.98%
WaterSubaqueousD7,023.372.76%
Leighcan familyWell drained, Somewhat excessively drainedC, B4,633.031.82%
SphinxSomewhat excessively drainedD3,065.881.21%
Urban landUnspecifiedD3,047.751.2%
GilpinWell drainedC2,572.391.01%
PerryPoorly drainedC, D2,423.650.95%
CreteModerately well drainedC, C/D, D1,891.830.74%
ZaneisWell drainedB1,863.880.73%
LapineExcessively drainedA1,583.990.62%
Legault familyExcessively drainedD1,455.60.57%
MemphisWell drainedB1,437.20.57%
DekalbSomewhat excessively drained, Excessively drained, Well drainedC, A, D, B1,402.150.55%
Moran familySomewhat excessively drainedB, A1,396.750.55%
CrowleySomewhat poorly drainedD1,345.510.53%
Component acreage is estimated from SSURGO map-unit component percentages. Component values are not independently mapped polygon boundaries.

Drainage Class Distribution

Well drained34.83%
88,571.06 acres
Unknown / Unmapped10.31%
26,221.65 acres
Moderately well drained9.54%
24,259.2 acres
Somewhat excessively drained9.32%
23,689.22 acres
Somewhat poorly drained7.8%
19,836.71 acres
Poorly drained6.48%
16,486.36 acres
Excessively drained3.87%
9,841.88 acres
Very poorly drained3.17%
8,068.03 acres
Subaqueous0.04%
108.19 acres

Hydrologic Soil Group Distribution

Group D27.12%
68,949.55 acres
Group B16.81%
42,747.93 acres
Group C16.57%
42,131.1 acres
Group A7.92%
20,144.38 acres
Group Unknown / Unmapped7.51%
19,083.73 acres
Group C/D6.12%
15,569.44 acres
Group B/D2.19%
5,567.53 acres
Group A/D1.14%
2,888.65 acres

Hydrologic soil groups are USDA/NRCS classifications related to runoff potential under specified soil conditions. They are not a property-level flood-risk rating.

Slope Characteristics

Weighted Average Slope: 16.21%
Nearly Level (0-2%)24.71%
62,829.16 acres
Gently Sloping (2-8%)18.46%
46,949.66 acres
Moderately Sloping (8-15%)6.97%
17,719.45 acres
Steep (15-30%)11.82%
30,046.7 acres
Very Steep (>30%)15.39%
39,134.51 acres
Unspecified Slope8.02%
20,402.83 acres

Sources & Methodology

USDA NRCS SSURGO

Mapped soil units, components, drainage classes, hydrologic groups, and slope ratings derived from official Soil Data Access REST services.

U.S. Census Bureau TIGER/Line

County land geometry used for county-level coverage calculation.

Coverage Method

Mapped acreage is calculated from true spatial vector intersection of county land geometry and SSURGO mapped soil polygons using NAD83 / CONUS Albers Equal Area projection (EPSG:5070).