Willow Creek Pass Area, Colorado, Parts of Grand and Jackson Counties

Survey Area CO650• Colorado

The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). The most common soil order is Inceptisols — young soils with minimal horizon development but more than Entisols. 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 Willow Creek Pass Area, Colorado, Parts of Grand and Jackson Counties. 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
Fulvance-Lakehelen complex, 15 to 40 percent slopes	50K	Well drained	C	Very limited	Very limited
Frisco, very stony-Tepete families, complex, 0 to 40 percent slopes, landslides	28K	Well drained	C	Very limited	Very limited
Frisco family very cobbly loam, 10 to 40 percent slopes, very stony	16K	Well drained	C	Very limited	Very limited
Peedee-Dorpat family complex, 3 to 20 percent slopes	12K	Excessively drained	B	Somewhat limited	Very limited
Leaps family-Bonneville, very stony-Haydenfork family complex, 1 to 40 percent slopes, landslides	12K	Well drained	D	Very limited	Very limited
Arcette, family-Targhee family- Rubble land complex, 45 to 75% slopes	11K	Well drained	B	Very limited	Very limited
Targhee-Storm families complex, 5 to 40 percent slopes	10K	Well drained	C	Very limited	Very limited
Storm, very stony-Targhee families, complex, 35 to 70 percent slopes	9K	Well drained	B	Very limited	Very limited
Frisco family, very stony-Finn family, very stony-Water complex, 0 to 20 percent slopes	8K	Well drained	C	Somewhat limited	Very limited
Bushvalley, very stony-Woodhall families, complex, 40 to 70 percent slopes	8K	Well drained	D	Very limited	Very limited
Libeg-Youga-Bywell families, association, 0 to 20 percent slopes	7K	Well drained	C	Somewhat limited	Very limited
Lonniebee-Tamarron family-Graysill family complex, 40 to 70 percent slopes	6K	Well drained	C	Very limited	Very limited
Bupas, extremely stony-Endlich, extremely stony-Tepete family complex, 0 to 25 percent slopes	5K	Well drained	D	Very limited	Very limited
Leighcan, very stony-Finn families, complex, 1 to 60% slopes	5K	Well drained	A	Very limited	Very limited
Rock outcrop-Rubble land complex	4K		D	Not rated	Not rated
Leighcan very stony sandy loam, 40 to 65 percent slopes, very stony	4K	Well drained	A	Very limited	Very limited
Hollandlake-Poia families, complex, 0 to 20 percent slopes, very stony	4K	Well drained	C	Somewhat limited	Very limited
Finn and Tepete families, 0 to 15 percent slopes	3K	Very poorly drained	C/D	Very limited	Very limited
Mirror gravelly loam, 7 to 45 percent slopes, very stony	3K	Well drained	C	Very limited	Very limited
Redyon, extremely stony-Rubble land complex, 30 to 60 percent slopes	2K	Well drained	B	Very 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.

Inceptisols

Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.

Alfisols

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

Mollisols

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

Histosols

Organic peat and muck soils formed in wetlands. Very poor for building (compressible) and septic. Often in regulated wetlands.

What This Means

Building & Foundations

About 83% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 97% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.

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.