Weld County, Colorado, Southern Part

Survey Area CO618• Colorado

The dominant drainage class is Well drained and the dominant hydrologic group is A (high infiltration, low runoff). The most common soil order is Entisols — young soils with little profile development, often on floodplains or steep slopes. This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Weld County, Colorado, Southern Part. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map Unit	Acres	Drainage	Hydro Group	Dwellings	Septic
Valent sand, 3 to 9 percent slopes	177K	Excessively drained	A	Not limited	Very limited
Vona loamy sand, 0 to 3 percent slopes	67K	Well drained	A	Not limited	Not limited
Valent sand, 0 to 3 percent slopes	65K	Excessively drained	A	Not limited	Very limited
Weld loam, 1 to 3 percent slopes	60K	Well drained	C	Not limited	Somewhat limited
Olney fine sandy loam, 1 to 3 percent slopes	57K	Well drained	B	Not limited	Somewhat limited
Kim loam, 1 to 3 percent slopes	42K	Well drained	A	Not limited	Not limited
Osgood sand, 0 to 3 percent slopes	38K	Well drained	A	Not limited	Not limited
Aquolls and Aquents, gravelly substratum	33K	Poorly drained	D	Very limited	Very limited
Otero sandy loam, 1 to 3 percent slopes	31K	Well drained	A	Not limited	Not limited
Vona loamy sand, 5 to 9 percent slopes	31K	Well drained	A	Not limited	Not limited
Wiley-Colby complex, 1 to 3 percent slopes	26K	Well drained	B	Somewhat limited	Somewhat limited
Colby-Adena loams, 3 to 9 percent slopes	21K	Well drained	B	Not limited	Somewhat limited
Aquolls and Aquepts, flooded	21K	Poorly drained	D	Very limited	Very limited
Water	21K			Not rated	Not rated
Nunn clay loam, 0 to 1 percent slopes	20K	Well drained	C	Somewhat limited	Very limited
Altvan loam, 0 to 1 percent slopes	20K	Well drained	B	Not limited	Somewhat limited
Olney loamy sand, 1 to 3 percent slopes	19K	Well drained	B	Not limited	Somewhat limited
Nunn clay loam, 1 to 3 percent slopes	19K	Well drained	C	Somewhat limited	Very limited
Vona loamy sand, 3 to 5 percent slopes	19K	Well drained	A	Not limited	Not limited
Colby loam, 1 to 3 percent slopes	19K	Well drained	B	Not limited	Somewhat limited

Soil Orders in This Area

The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.

Entisols

Young soils with little development — found on floodplains, dunes, and steep slopes. Properties vary widely by setting.

Mollisols

Fertile grassland soils with thick, dark topsoil. Among the best for agriculture, building, and gardening.

Aridisols

Dry-climate soils with low organic matter. Often have caliche layers that make excavation difficult. Low shrink-swell is good for foundations.

Alfisols

Moderately weathered forest soils with clay-enriched subsoil. Productive for agriculture, generally good for building and septic.

What This Means

Building & Foundations

Most soils are generally favorable for residential construction. Standard foundations are usually viable, though site-specific evaluation is always recommended.

Septic Systems

About 41% of soils have significant septic limitations, while others are more suitable. A perc test is essential — conditions vary across the area.

Gardening & Agriculture

Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.