USDA SSURGO COUNTY SOIL REFERENCE

Orleans Parish, Louisiana Soil Summary

This page summarizes USDA SSURGO mapped soil information for Orleans Parish, Louisiana.

Mapped Land Coverage
100%223,903.29 mapped acres of 223,903.53 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
Water
Symbol: W12.91% of mapped area
Largest estimated component
Water
33,395.1 acres (14.91% of mapped area)
Mapped units & components
15 soil units • 15 component series
Distinct SSURGO map units & series
Dominant drainage class
Unknown / Unmapped
Highest acreage drainage class
Dominant hydrologic group
Group D
Runoff potential classification
Weighted average slope
9.9%
Terrain slope analysis
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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 Orleans Parish ranked by intersected vector acreage
SymbolMap Unit NameMapped Acres% of Mapped Area
WWater28,911.4812.91%
59BCabot silt loam, 0 to 8 percent slopes, very stony12,794.615.71%
HbBHilton loam, 3 to 8 percent slopes6,520.672.91%
12DTunbridge-Lyman complex, 15 to 35 percent slopes, very rocky5,145.682.3%
AnAAppleton silt loam, 0 to 3 percent slopes5,014.892.24%
47BCabot silt loam, 3 to 8 percent slopes4,454.591.99%
CEClovelly muck, 0 to 0.2 percent slopes, very frequently flooded4,410.751.97%
SkSchriever clay, 0 to 1 percent slopes, rarely flooded4,283.321.91%
59CCabot silt loam, 8 to 15 percent slopes, very stony4,143.661.85%
94DVershire-Glover complex, 15 to 35 percent slopes, very rocky4,076.111.82%
WWater4,068.441.82%
101DTunbridge-Peru complex, 15 to 35 percent slopes, very stony3,581.691.6%
101CTunbridge-Peru complex, 8 to 15 percent slopes, very stony3,511.021.57%
259CColonel-Cabot complex, 8 to 15 percent slopes, very stony3,067.381.37%
16CPeru fine sandy loam, 8 to 15 percent slopes, very stony2,935.151.31%

Estimated Soil Components

Component acreage estimated from SSURGO component percentages
ComponentDrainage ClassHydrologic GroupEstimated Acres% of Mapped Area
WaterUnspecifiedUnspecified33,395.114.91%
CabotPoorly drainedD22,935.1910.24%
PeruModerately well drainedC/D12,584.285.62%
HiltonModerately well drainedB/D, C9,101.414.06%
TunbridgeWell drainedC9,036.54.04%
BucklandModerately well drainedC/D, D8,620.213.85%
VershireWell drainedC7,199.663.22%
ColonelSomewhat poorly drainedC/D, D6,247.972.79%
AppletonSomewhat poorly drainedB/D, C/D5,652.152.52%
ClovellyVery poorly drainedC/D4,333.781.94%
SchrieverPoorly drainedD4,292.531.92%
LymanSomewhat excessively drainedD4,234.11.89%
AquentsVery poorly drainedD3,356.941.5%
GloverSomewhat excessively drainedD3,208.841.43%
OvidSomewhat poorly drainedC/D3,079.71.38%
Component acreage is estimated from SSURGO map-unit component percentages. Component values are not independently mapped polygon boundaries.

Drainage Class Distribution

Unknown / Unmapped20.18%
45,191.92 acres
Moderately well drained19.86%
44,473.06 acres
Poorly drained17.79%
39,822.38 acres
Well drained14.6%
32,685.75 acres
Somewhat poorly drained12.61%
28,237.43 acres
Very poorly drained9.72%
21,753.24 acres
Somewhat excessively drained4.59%
10,279.92 acres
Excessively drained0.63%
1,405.71 acres

Hydrologic Soil Group Distribution

Group D27.82%
62,289.04 acres
Group Unknown / Unmapped20.53%
45,960.23 acres
Group C/D18.66%
41,775.14 acres
Group C10.85%
24,298.08 acres
Group B/D10.32%
23,104.06 acres
Group B5%
11,184.8 acres
Group A3.6%
8,068.31 acres
Group A/D3.2%
7,169.74 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: 9.9%
Nearly Level (0-2%)27.05%
60,572.88 acres
Gently Sloping (2-8%)23.56%
52,742.89 acres
Moderately Sloping (8-15%)14.58%
32,636.81 acres
Steep (15-30%)10.04%
22,478.84 acres
Very Steep (>30%)4.99%
11,166.52 acres
Unspecified Slope19.76%
44,251.47 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).