King County, Texas

Survey Area TX269• Texas

The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high 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 King County, Texas. 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
Cottonwood-Knoco complex, 3 to 20 percent slopes	78K	Well drained	D	Very limited	Very limited
Talpa-Knoco-Rock outcrop complex, 5 to 30 percent slopes	61K	Well drained	D	Very limited	Very limited
Woodward-Deepwood complex, warm, 3 to 5 percent slopes	38K	Well drained	C	Somewhat limited	Very limited
Tilvern clay loam, 1 to 3 percent slopes	37K	Well drained	D	Very limited	Very limited
Woodward-Deepwood-Quinlan complex, warm, 2 to 12 percent slopes	35K	Well drained	C	Somewhat limited	Very limited
Carey loam, 1 to 3 percent slopes	31K	Well drained	B	Not limited	Somewhat limited
Westill clay loam, 0 to 1 percent slopes	31K	Well drained	D	Very limited	Very limited
Deepwood-Woodward-Quinlan complex, warm, 2 to 45 percent slopes	29K	Well drained	B	Not limited	Somewhat limited
Talpa gravelly loam, 1 to 5 percent slopes	28K	Well drained	D	Very limited	Very limited
Vernon-Knoco complex, cool, 1 to 12 percent slopes	25K	Well drained	D	Somewhat limited	Very limited
Rock outcrop-Cottonwood complex, 20 to 45 percent slopes	19K		D	Very limited	Very limited
Badland and Knoco soils, dry, 2 to 20 percent slopes	16K	Well drained	D	Very limited	Very limited
Talpa-Quanah complex, 0 to 3 percent slopes	15K	Well drained	D	Very limited	Very limited
Quanah-Talpa complex, 1 to 8 percent slopes	12K	Well drained	B	Somewhat limited	Somewhat limited
Deepwood-Quinlan-Cottonwood complex, 5 to 50 percent slopes	12K	Well drained	D	Very limited	Very limited
Carey loam, 0 to 1 percent slopes	11K	Well drained	B	Not limited	Somewhat limited
Woodward-Deepwood complex, warm, 5 to 8 percent slopes	11K	Well drained	C	Somewhat limited	Very limited
Grandfield fine sandy loam, 1 to 3 percent slopes	8K	Well drained	B	Not limited	Very limited
Quanah silty clay loam, 1 to 3 percent slopes	7K	Well drained	B	Somewhat limited	Somewhat limited
St. Paul silt loam, 0 to 1 percent slopes	6K	Well drained	C	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.

Inceptisols

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

Mollisols

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

Entisols

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

Alfisols

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

What This Means

Building & Foundations

About 57% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes. A geotechnical assessment is recommended before building.

Septic Systems

About 82% 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.