Lamar and Delta Counties, Texas

Survey Area TX614 Texas

The dominant drainage class is Moderately well drained and the dominant hydrologic group is D (very slow infiltration, high runoff). 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 Lamar and Delta Counties, Texas.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Houston Black clay, 1 to 3 percent slopes 76K Moderately well drainedDVery limitedVery limited
Annona loam, 1 to 4 percent slopes 58K Moderately well drainedDVery limitedVery limited
Freestone-Hicota complex, 0 to 3 percent slopes 58K Moderately well drainedCSomewhat limitedVery limited
Wilson silt loam, 0 to 2 percent slopes 50K Moderately well drainedDVery limitedVery limited
Leson clay, 1 to 3 percent slopes 45K Moderately well drainedDVery limitedVery limited
Crockett loam, 1 to 3 percent slopes 36K Moderately well drainedDVery limitedVery limited
Woodtell loam, 5 to 12 percent slopes 28K Well drainedDVery limitedVery limited
Normangee clay loam, 1 to 3 percent slopes 25K Moderately well drainedCVery limitedVery limited
Water 25K DNot ratedNot rated
Normangee clay loam, 2 to 5 percent slopes, eroded 24K Moderately well drainedCVery limitedVery limited
Trinity clay, 0 to 1 percent slopes, occasionally flooded 24K Moderately well drainedDVery limitedVery limited
Whakana-Porum complex, 8 to 20 percent slopes 21K Well drainedBSomewhat limitedSomewhat limited
Heiden clay, 2 to 5 percent slopes 19K Well drainedDVery limitedVery limited
Trinity clay, 0 to 1 percent slopes, frequently flooded 18K Moderately well drainedDVery limitedVery limited
Derly, occasionally ponded-Raino complex, 0 to 1 percent slopes 16K Poorly drainedDVery limitedVery limited
Deport clay, 1 to 3 percent slopes 16K Somewhat poorly drainedDVery limitedVery limited
Kaufman clay, 0 to 1 percent slopes, frequently flooded 15K Moderately well drainedDVery limitedVery limited
Whakana fine sandy loam, 1 to 5 percent slopes 15K Well drainedBSomewhat limitedSomewhat limited
Heiden-Ferris complex, 3 to 5 percent slopes 15K Well drainedDVery limitedVery limited
Ferris clay, 5 to 12 percent slopes, eroded 15K Well drainedDVery limitedVery limited

What This Means

Building & Foundations

About 80% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 89% 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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