Pontotoc County, Oklahoma

Survey Area OK123• Oklahoma

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 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 Pontotoc County, Oklahoma. 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
Darnell-Stephenville complex, 5 to 20 percent slopes	47K	Well drained	D	Very limited	Very limited
Shidler-Rock outcrop complex, 5 to 30 percent slopes	40K	Well drained	D	Very limited	Very limited
Verdigris and Cleora soils, 0 to 3 percent slopes, frequently flooded	28K	Well drained	B	Very limited	Very limited
Verdigris silty clay loam, 0 to 1 percent slopes, occasionally flooded	24K	Well drained	B	Very limited	Very limited
Lula-Shidler complex, 3 to 5 percent slopes	19K	Well drained	D	Very limited	Very limited
Stephenville-Darnell complex, 3 to 8 percent slopes	17K	Well drained	D	Very limited	Very limited
Chigley gravelly sandy loam, 5 to 12 percent slopes	15K	Moderately well drained	C	Somewhat limited	Very limited
Newalla fine sandy loam, 1 to 5 percent slopes	15K	Moderately well drained	D	Very limited	Very limited
Durant and Bates soils, 3 to 5 percent slopes, severely eroded	14K	Moderately well drained	D	Very limited	Very limited
Durant loam, 1 to 3 percent slopes	12K	Moderately well drained	D	Very limited	Very limited
Konawa loamy fine sand, 3 to 8 percent slopes, severely eroded	11K	Well drained	B	Not limited	Very limited
Newalla-Stephenville complex, 3 to 8 percent slopes, severely eroded	11K	Moderately well drained	D	Very limited	Very limited
Steedman silty clay loam, 3 to 8 percent slopes	10K	Moderately well drained	D	Very limited	Very limited
Scullin-Shidler complex, 3 to 5 percent slopes	9K	Well drained	C	Very limited	Very limited
Chigley gravelly sandy loam, 3 to 8 percent slopes, severely eroded	9K	Moderately well drained	C	Somewhat limited	Very limited
Verdigris silt loam, 0 to 1 percent slopes, occasionally flooded	8K	Well drained	B	Very limited	Very limited
Chigley gravelly sandy loam, 1 to 5 percent slopes	8K	Moderately well drained	C	Somewhat limited	Very limited
Lula loam, 3 to 5 percent slopes	8K	Well drained	B	Somewhat limited	Somewhat limited
Tussy clay, 5 to 12 percent slopes	7K	Moderately well drained	D	Very limited	Very limited
Konawa loamy fine sand, 3 to 8 percent slopes	7K	Well drained	B	Not 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.

Alfisols

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

Inceptisols

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

Vertisols

High-clay soils that shrink and swell dramatically. Fertile but challenging for foundations and septic systems.

What This Means

Building & Foundations

About 81% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, 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.