Weld County, Colorado, Northern Part

Survey Area CO617• Colorado

The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. 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, Northern 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
Ascalon fine sandy loam, 0 to 6 percent slopes	198K	Well drained	B	Not limited	Not limited
Olney fine sandy loam, 0 to 6 percent slopes	139K	Well drained	B	Not limited	Somewhat limited
Platner loam, 0 to 3 percent slopes	105K	Well drained	C	Not limited	Somewhat limited
Ascalon sandy loam, 5 to 9 percent slopes	66K	Well drained	B	Not limited	Somewhat limited
Kim-Mitchell complex, 0 to 6 percent slopes	64K	Well drained	C	Not limited	Not limited
Nunn loam, 0 to 6 percent slopes	49K	Well drained	C	Somewhat limited	Very limited
Olney fine sandy loam, 6 to 9 percent slopes	48K	Well drained	B	Not limited	Somewhat limited
Renohill-Shingle complex, 3 to 9 percent slopes	46K	Well drained	D	Somewhat limited	Very limited
Altvan fine sandy loam, 0 to 6 percent slopes	42K	Well drained	B	Not limited	Somewhat limited
Renohill fine sandy loam, 0 to 6 percent slopes	39K	Well drained	D	Somewhat limited	Very limited
Epping silt loam, 0 to 9 percent slopes	37K	Well drained	D	Very limited	Very limited
Haverson loam, 0 to 3 percent slopes	35K	Well drained	B	Not limited	Somewhat limited
Renohill fine sandy loam, 6 to 9 percent slopes	29K	Well drained	D	Somewhat limited	Very limited
Peetz gravelly sandy loam, 5 to 20 percent slopes	25K	Somewhat excessively drained	A	Somewhat limited	Very limited
Terry sandy loam, 3 to 9 percent slopes	24K	Well drained	B	Somewhat limited	Very limited
Avar fine sandy loam	23K	Well drained	C	Not limited	Somewhat limited
Nunn clay loam, 0 to 6 percent slopes	23K	Well drained	C	Somewhat limited	Very limited
Kim-Mitchell complex, 6 to 9 percent slopes	22K	Well drained	C	Not limited	Not limited
Stoneham fine sandy loam, 0 to 6 percent slopes	21K	Well drained	B	Not limited	Not limited
Cascajo gravelly sandy loam, 5 to 20 percent slopes	20K	Excessively drained	A	Somewhat limited	Very 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.

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.

Entisols

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

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 27% of soils have significant septic limitations, while others are more suitable. A perc test is essential — conditions vary across the area.

Gardening & Agriculture

Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.