McClain County, Oklahoma

Survey Area OK087 Oklahoma

The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 McClain County, Oklahoma.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Nash-Lucien complex, 5 to 12 percent slopes 63K Well drainedDVery limitedVery limited
Grant silt loam, 3 to 5 percent slopes, eroded 37K Well drainedBSomewhat limitedSomewhat limited
Stephenville fine sandy loam, 3 to 5 percent slopes, moderately eroded 25K Well drainedCSomewhat limitedVery limited
Nash-Lucien complex, 3 to 5 percent slopes 13K Well drainedCSomewhat limitedVery limited
Port silt loam, 0 to 1 percent slopes, occasionally flooded 13K Well drainedBVery limitedVery limited
Grant silt loam, 5 to 8 percent slopes, eroded 13K Well drainedBNot limitedSomewhat limited
Tamford-Grainola complex, 5 to 12 percent slopes 13K Well drainedDVery limitedVery limited
Grant-Port, frequently flooded, complex, 0 to 12 percent slopes 13K Well drainedBSomewhat limitedSomewhat limited
Stephenville-Gullied land complex, 1 to 8 percent slopes 12K Well drainedCSomewhat limitedVery limited
Gracemore loam, 0 to 1 percent slopes, frequently flooded 12K Somewhat poorly drainedAVery limitedVery limited
Renfrow silt loam, 3 to 5 percent slopes, eroded 12K Well drainedDSomewhat limitedVery limited
Stephenville fine sandy loam, 3 to 5 percent slopes 11K Well drainedCSomewhat limitedVery limited
Keokuk silt loam, 0 to 1 percent slopes, occasionally flooded 10K Well drainedBVery limitedVery limited
Water 8K DNot ratedNot rated
Kirkland silt loam, 1 to 3 percent slopes 7K Well drainedDVery limitedVery limited
Pulaski fine sandy loam, 0 to 1 percent slopes, occasionally flooded 7K Well drainedAVery limitedVery limited
Grant silt loam, 3 to 5 percent slopes 7K Well drainedBSomewhat limitedSomewhat limited
Pond Creek silt loam, 1 to 3 percent slopes 7K Well drainedBSomewhat limitedSomewhat limited
Gullied land-Grant complex, 3 to 8 percent slopes 7K Well drainedCNot limitedVery limited
Ashport, Port and Pulaski soils, 0 to 1 percent slopes, frequently flooded 7K Well drainedBVery limitedVery limited

What This Means

Building & Foundations

About 44% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.

Septic Systems

About 71% 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.

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