USDA SSURGO COUNTY SOIL REFERENCE

El Paso County, Colorado Soil Summary

This page summarizes USDA SSURGO mapped soil information for El Paso County, Colorado.

Mapped Land Coverage
100%1,362,628.49 mapped acres of 1,362,628.24 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
Hueco-Wink association, hummocky
Symbol: HW7.41% of mapped area
Largest estimated component
Sphinx
128,770.5 acres (9.45% 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 A
Runoff potential classification
Weighted average slope
13.06%
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 El Paso County ranked by intersected vector acreage
SymbolMap Unit NameMapped Acres% of Mapped Area
HWHueco-Wink association, hummocky101,026.537.41%
46Sphinx-Rock outcrop complex, 15 to 80 percent slopes49,990.983.67%
8Blakeland loamy sand, 1 to 9 percent slopes44,592.543.27%
97Truckton sandy loam, 3 to 9 percent slopes44,462.23.26%
BPCBluepoint association, rolling41,209.183.02%
102Valent sand, 1 to 12 percent slopes, dry38,615.822.83%
42Sphinx gravelly coarse sandy loam, 15 to 40 percent slopes37,567.592.76%
47Sphinx, warm-Rock outcrop complex, 15 to 80 percent slopes30,494.292.24%
12Bresser sandy loam, cool, 3 to 5 percent slopes26,246.281.93%
43Sphinx gravelly coarse sandy loam, 40 to 70 percent slopes25,322.261.86%
60Olney sandy loam, 0 to 3 percent slopes24,246.491.78%
LMRock outcrop-Lozier association23,335.941.71%
2Ascalon sandy loam, 1 to 3 percent slopes19,497.31.43%
44Sphinx gravelly coarse sandy loam, warm, 15 to 40 percent slopes18,338.921.35%
DCDDelnorte-Canutio association hilly18,296.71.34%

Estimated Soil Components

Component acreage estimated from SSURGO component percentages
ComponentDrainage ClassHydrologic GroupEstimated Acres% of Mapped Area
SphinxSomewhat excessively drainedD128,770.59.45%
TrucktonWell drainedA71,667.595.26%
Rock outcropUnspecifiedD64,087.644.7%
BlakelandSomewhat excessively drainedA50,674.683.72%
WinkWell drainedA50,060.283.67%
BresserWell drainedB, C47,586.673.49%
BluepointSomewhat excessively drainedA46,379.993.4%
HuecoWell drainedB45,461.943.34%
ValentExcessively drainedA43,349.833.18%
OlneyWell drainedB38,519.572.83%
UnnamedUnspecifiedUnspecified34,020.722.5%
AscalonWell drainedB33,825.522.48%
BijouSomewhat excessively drainedA25,795.831.89%
VonidSomewhat excessively drainedA23,217.921.7%
RazorWell drainedD19,787.521.45%
Component acreage is estimated from SSURGO map-unit component percentages. Component values are not independently mapped polygon boundaries.

Drainage Class Distribution

Well drained55.95%
762,455.31 acres
Somewhat excessively drained25.76%
351,043.2 acres
Unknown / Unmapped10.3%
140,341.13 acres
Excessively drained6.04%
82,358.45 acres
Poorly drained1.01%
13,823.69 acres
Moderately well drained0.9%
12,217.59 acres
Very poorly drained0.03%
362.38 acres
Somewhat poorly drained0%
26.74 acres

Hydrologic Soil Group Distribution

Group A31.67%
431,574.3 acres
Group B29.15%
397,259.57 acres
Group D25.17%
342,998.07 acres
Group C7.81%
106,469.9 acres
Group Unknown / Unmapped5.51%
75,134.97 acres
Group A/D0.65%
8,810.17 acres
Group C/D0.03%
381.52 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: 13.06%
Nearly Level (0-2%)26.7%
363,823.16 acres
Gently Sloping (2-8%)32.34%
440,693.35 acres
Moderately Sloping (8-15%)8.63%
117,608.88 acres
Steep (15-30%)10.63%
144,831.43 acres
Very Steep (>30%)14.53%
197,997.82 acres
Unspecified Slope7.17%
97,673.85 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).