Soil survey area

West Carroll Parish, Louisiana

Survey Area LA123• Louisiana
The short version

The most common soil here is Calhoun, on about 36% of the land: a silt loam, smooth, like flour. Grenada and Sharkey come next.

About 2% of the land drains well, and 46% stays wet for long stretches; groundwater comes within two feet of the surface under 87% of it.

USDA rates 98% of the land very limited for a standard septic drain field, and 87% very limited for homes with basements. That means extra cost or special design, not that it can't be done.

Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.

The ground underfoot

The soils you're most likely standing on

The biggest named soils in West Carroll Parish, Louisiana, each drawn five feet deep from its official USDA description, in its recorded colors.

Calhoun
36% of the area
Silt loam topsoil · poorly drained
Smooth, like flour. Fertile and holds water well.
Alfisols
Grenada
28% of the area
Silt loam topsoil · moderately well drained
Smooth, like flour. Fertile and holds water well.
Alfisols
Sharkey
7% of the area
Clay topsoil · poorly drained
Sticky when wet and rock-hard when dry. Drains slowly.
Vertisols
Calloway
6% of the area
Silt loam topsoil · somewhat poorly drained
Smooth, like flour. Fertile and holds water well.
Alfisols
Dundee
5% of the area
Loam topsoil · somewhat poorly drained
A balanced mix that crumbles in your hand. The gardener's ideal.
Alfisols
Dubbs
4% of the area
Silt loam topsoil · well drained
Smooth, like flour. Fertile and holds water well.
Alfisols

Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.

The biggest mapped areas

The dominant drainage class is Moderately well drained and the dominant hydrologic group is C/D (varies with drainage). The most common soil order is Alfisols — moderately leached forest soils with a clay-enriched subsoil. 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 West Carroll Parish, Louisiana. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Grenada-Calhoun silt loams complex, 0 to 3 percent slopes 112K Moderately well drainedC/DVery limitedVery limited
Calhoun silt loam 36K Poorly drainedC/DVery limitedVery limited
Dundee-Dubbs complex 22K Somewhat poorly drainedCSomewhat limitedVery limited
Sharkey clay 18K Poorly drainedDVery limitedVery limited
Calhoun-Calloway complex 12K Poorly drainedC/DVery limitedVery limited
Forestdale silty clay loam, 0 to 1 percent slopes, rarely flooded, upland phase 11K Poorly drainedC/DVery limitedVery limited
Grenada silt loam, 1 to 3 percent slopes 5K Moderately well drainedC/DVery limitedVery limited
Perry clay 4K Poorly drainedDVery limitedVery limited
Memphis silt loam, 8 to 20 percent slopes 2K Well drainedBSomewhat limitedSomewhat limited
Water 2K Not ratedNot rated
Dexter silt loam, 1 to 3 percent slopes 2K Well drainedBNot limitedVery limited
Commerce silty clay loam, 0 to 1 percent slopes 1K Somewhat poorly drainedCSomewhat limitedVery limited
Memphis silt loam, 0 to 2 percent slopes 1K Well drainedBNot limitedSomewhat limited
Foley silt loam 1K Poorly drainedDVery limitedVery limited
Grenada silt loam, 3 to 5 percent slopes 934 Moderately well drainedC/DVery limitedVery limited
Calloway silt loam 417 Somewhat poorly drainedC/DVery limitedVery limited
Deerford silt loam 139 Somewhat poorly drainedC/DVery limitedVery 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.

Alfisols
Moderately weathered forest soils with clay-enriched subsoil. Productive for agriculture, generally good for building and septic.
Vertisols
High-clay soils that shrink and swell dramatically. Fertile but challenging for foundations and septic systems.
Inceptisols
Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.

What This Means

Building & Foundations

About 87% 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 98% 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.

Look Up a Specific Address

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