USDA SSURGO COUNTY SOIL REFERENCE

Benton County, Arkansas Soil Summary

This page summarizes USDA SSURGO mapped soil information for Benton County, Arkansas.

Mapped Land Coverage
100%565,992.34 mapped acres of 565,992.41 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
Ritzville silt loam, 0 to 5 percent slopes
Symbol: ReB3.46% of mapped area
Largest estimated component
Ritzville
24,084.76 acres (4.26% 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 B
Runoff potential classification
Weighted average slope
10.75%
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 Benton County ranked by intersected vector acreage
SymbolMap Unit NameMapped Acres% of Mapped Area
ReBRitzville silt loam, 0 to 5 percent slopes19,562.033.46%
CvFClarksville extremely gravelly silt loam, 12 to 50 percent slopes15,379.382.72%
WdABWarden silt loam, 0 to 5 percent slopes10,497.061.85%
NfCNixa very gravelly silt loam, 3 to 8 percent slopes10,116.231.79%
377BDinsdale silty clay loam, 2 to 5 percent slopes9,252.421.63%
STFSmithdale and Toinette soils, 20 to 45 percent slopes8,777.81.55%
73365Bardley very gravelly silt loam, 8 to 35 percent slopes, stony8,266.861.46%
283Playas7,746.281.37%
70024Goss very gravelly silt loam, 15 to 35 percent slopes, very stony7,311.941.29%
11BColo-Ely complex, 0 to 5 percent slopes7,266.441.28%
CnBCaptina silt loam, 1 to 3 percent slopes6,310.931.12%
HeEHezel loamy fine sand, 0 to 30 percent slopes5,482.30.97%
SSFSmithdale-Sweatman-Providence association, 12 to 35 percent slopes5,477.890.97%
TsCTonti gravelly silt loam, 3 to 8 percent slopes5,185.730.92%
ShABShano silt loam, 0 to 5 percent slopes5,019.980.89%

Estimated Soil Components

Component acreage estimated from SSURGO component percentages
ComponentDrainage ClassHydrologic GroupEstimated Acres% of Mapped Area
RitzvilleWell drainedB24,084.764.26%
WardenWell drainedB20,045.643.54%
ClarksvilleExcessively drained, Somewhat excessively drainedB, A, D, C16,138.392.85%
WaterSubaqueousD13,953.312.47%
NixaModerately well drainedD13,379.812.36%
DinsdaleModerately well drainedC12,745.172.25%
SmithdaleWell drainedB11,537.352.04%
BardleyWell drainedD11,323.662%
PlayasUnspecifiedUnspecified7,795.341.38%
ColoPoorly drainedC/D7,677.511.36%
ShanoWell drainedB7,613.141.35%
GossWell drainedC, B, D7,596.11.34%
ProvidenceModerately well drainedC/D, C, D7,274.431.29%
BrantelExcessively drained, Somewhat excessively drainedA7,238.331.28%
CaptinaModerately well drainedC, C/D, D6,418.551.13%
Component acreage is estimated from SSURGO map-unit component percentages. Component values are not independently mapped polygon boundaries.

Drainage Class Distribution

Well drained41.36%
234,107.72 acres
Moderately well drained16.39%
92,780.3 acres
Somewhat excessively drained8.86%
50,126.42 acres
Somewhat poorly drained8.37%
47,355.07 acres
Excessively drained6.91%
39,135.98 acres
Poorly drained6.73%
38,100.19 acres
Unknown / Unmapped4.28%
24,220.97 acres
Very poorly drained1.54%
8,740 acres
Subaqueous1.14%
6,447.2 acres

Hydrologic Soil Group Distribution

Group B22.43%
126,971.04 acres
Group C22.24%
125,855.47 acres
Group A15.1%
85,471.79 acres
Group D14.91%
84,366.71 acres
Group C/D8.71%
49,285.37 acres
Group B/D6.52%
36,893.22 acres
Group Unknown / Unmapped4.95%
28,010.06 acres
Group A/D0.74%
4,160.18 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: 10.75%
Nearly Level (0-2%)27.95%
158,200.65 acres
Gently Sloping (2-8%)31.33%
177,315.03 acres
Moderately Sloping (8-15%)12.19%
68,987.12 acres
Steep (15-30%)11.22%
63,486.5 acres
Very Steep (>30%)10.61%
60,027.1 acres
Unspecified Slope2.3%
12,997.46 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).