Soil series profile

Truckton soil series

Truckton is a well drained soil with a sandy loam surface, mapped on 326,155 acres in 11 counties in CO. Hydrologic group A.

#1014 by mapped area coarse-loamy Aridic Argiustolls (Mollisols)

Drainage class: Well drained
Hydrologic group: A
Typical topsoil pH: 7.0
Mapped area: 326k

Typical Truckton profile

Texture and pH by depth

Depth to scale. More strongly shaded layers hold more clay. Horizon names are the soil survey's (A = topsoil, B = subsoil, C = parent material).

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Typical Truckton horizons (representative values)
Depth	Texture	pH	Clay	Sand	Organic matter
0–4 in (A)	Sandy loam	7.0	8%	68%	1.5%
4–12 in (Bt1)	Sandy loam	7.0	13%	67%	0.75%
12–19 in (Bt2)	Sandy loam	7.0	13%	67%	0.75%
19–80 in (C)	Sandy loam	7.0	13%	67%	0.25%

Representative values from the most extensive Truckton map unit (Truckton sandy loam, 3 to 9 percent slopes, survey area CO625). Other map units of this series vary within the series range.

Stock photo for illustration, not a sample of this soil series. Credit on the Sources & method page.

What this means

What Truckton soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Truckton soils is neutral: pH 7.0 (most land between 6.5 and 7.0), the range most vegetables, flowers and lawn grasses prefer.

Loamy topsoil (loam, silt loam and similar) covers 73% of mapped Truckton acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is sandy loam (73% of mapped Truckton acres).

100% of mapped Truckton acres is moderately well to excessively drained, which suits most garden plants.

For lawns and yards

91% of mapped acres is in hydrologic group A, where water soaks in fast. Lawns there dry out quickly; deeper, less frequent watering and organic matter help.

For a septic system

For conventional septic absorption fields, NRCS rates 51% of the acres in mapped Truckton soils very limited, 3% somewhat limited and 46% not limited.

Where the soil is very limited (slow permeability, a high water table, flooding, shallow bedrock or steep slopes), alternative systems such as mound or sand-filter designs are common and cost more.

Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.

Generated from the mapped numbers above using fixed rules, not a site visit. See how these notes are written.

Where Truckton soil is found

Mapped acres

Truckton is mapped in Colorado.

Counties with the most mapped Truckton soil
County	Acres	Share of county land
El Paso County, CO	122,611	8.4%
Elbert County, CO	71,216	6.1%
Morgan County, CO	39,852	4.9%
Adams County, CO	33,327	4.4%
Arapahoe County, CO	31,078	6.0%
Lincoln County, CO	12,665	0.8%
Douglas County, CO	8,770	1.6%
Denver County, CO	6,400	6.3%
Broomfield County, CO	120	0.4%
Weld County, CO	108	0.0%
Jefferson County, CO	7	0.0%

Septic absorption fields

NRCS rating, share of Truckton acres

Not limited 46%

Somewhat limited 3%

Very limited 51%

Not rated <1%

Septic tank absorption field rating across mapped Truckton acres. Scale 0 to 100% of mapped land.

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Septic tank absorption field rating across mapped Truckton acres.
Category	Share of acres
Not limited	45.7%
Somewhat limited	3.4%
Very limited	50.5%
Not rated	0.4%

Drainage, water table and flooding

Share of Truckton acres

Depth to seasonal high water table: None reported within about 6.5 feet (median where reported).
Flooding: Not mapped as flooding on most acres.
Slope: Typically 2–13% (median 5%).
Topsoil organic matter: Median 1.5%.

Drainage class

Excessively drained 0%

Somewhat excessively drained 0%

Well drained 100%

Moderately well drained 0%

Somewhat poorly drained 0%

Poorly drained 0%

Very poorly drained 0%

Drainage class across mapped Truckton acres. Scale 0 to 100% of mapped land.

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Drainage class across mapped Truckton acres.
Category	Share of acres
Excessively drained	0.0%
Somewhat excessively drained	0.0%
Well drained	100.0%
Moderately well drained	0.0%
Somewhat poorly drained	0.0%
Poorly drained	0.0%
Very poorly drained	0.0%

Hydrologic soil group

A: fast infiltration (mostly sandy or gravelly) 91%

B: moderate infiltration 8%

C: slow infiltration 0%

D: very slow infiltration (clayey, shallow or wet) 0%

A/D: D as is, A if drained 0%

B/D: D as is, B if drained 0%

C/D: D as is, C if drained 0%

Not rated <1%

Hydrologic soil group across mapped Truckton acres. Scale 0 to 100% of mapped land.

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Hydrologic soil group across mapped Truckton acres.
Category	Share of acres
A: fast infiltration (mostly sandy or gravelly)	91.4%
B: moderate infiltration	8.2%
C: slow infiltration	0.0%
D: very slow infiltration (clayey, shallow or wet)	0.0%
A/D: D as is, A if drained	0.0%
B/D: D as is, B if drained	0.0%
C/D: D as is, C if drained	0.0%
Not rated	0.4%

Sources & data dates

Source: USDA NRCS Soil Survey Geographic Database (SSURGO), queried through Soil Data Access. Public domain.
Data date: SSURGO as published on November 3, 2026 (most recent survey area update October 26, 2026). NRCS refreshes SSURGO each October.
Scope: All map unit components named Truckton (component kind "Series") in SSURGO: 326,155 acres.
Method: Shares are by mapped acres of Truckton components. The profile comes from the single largest Truckton component. Full methodology.

Independent reference site. No government affiliation or endorsement.

Full narrative description: USDA Official Soil Series Description for Truckton.