Grant County, Oklahoma

Survey Area OK053• 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 Grant 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
Kirkland silt loam, 1 to 3 percent slopes	100K	Well drained	D	Very limited	Very limited
Kirkland silt loam, 0 to 1 percent slopes, cool	58K	Well drained	D	Very limited	Very limited
Tabler silt loam, 0 to 1 percent slopes	40K	Moderately well drained	D	Very limited	Very limited
McLain silt loam, 0 to 1 percent slopes, rarely flooded	30K	Moderately well drained	C	Very limited	Very limited
Bethany silt loam, 0 to 1 percent slopes	29K	Well drained	C	Very limited	Very limited
Pond Creek silt loam, 0 to 1 percent slopes	26K	Well drained	B	Somewhat limited	Somewhat limited
McLain-Drummond complex, 0 to 1 percent slopes, rarely flooded	24K	Moderately well drained	C	Very limited	Very limited
Pond Creek silt loam, 1 to 3 percent slopes	23K	Well drained	B	Somewhat limited	Somewhat limited
Dale silt loam, 0 to 1 percent slopes, rarely flooded	21K	Well drained	B	Very limited	Somewhat limited
Renfrow silty clay loam, 3 to 5 percent slopes, eroded	18K	Well drained	D	Very limited	Very limited
Hawley fine sandy loam, 0 to 1 percent slopes, rarely flooded	16K	Well drained	B	Very limited	Very limited
Grainola silty clay loam, 3 to 5 percent slopes	15K	Well drained	D	Somewhat limited	Very limited
Kirkland-Pawhuska complex, 0 to 3 percent slopes	14K	Well drained	D	Very limited	Very limited
Devol fine sandy loam, 1 to 3 percent slopes	13K	Well drained	A	Not limited	Very limited
Eda loamy fine sand, 3 to 5 percent slopes	12K	Somewhat excessively drained	A	Not limited	Very limited
Reinach very fine sandy loam, 0 to 1 percent slopes, rarely flooded	11K	Well drained	B	Very limited	Somewhat limited
Grant silt loam, 1 to 3 percent slopes	11K	Well drained	B	Somewhat limited	Somewhat limited
Port silt loam, 0 to 1 percent slopes, occasionally flooded	11K	Well drained	B	Very limited	Very limited
Masham-Ashport frequently flooded complex, 0 to 20 percent slopes	11K	Well drained	D	Very limited	Very limited
Goodnight loamy fine sand, 1 to 5 percent slopes	10K	Excessively drained	A	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.

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.

Inceptisols

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

What This Means

Building & Foundations

About 77% 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 81% 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

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.