Concordia Parish, Louisiana
The dominant drainage class is Poorly 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 Concordia Parish, Louisiana.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Tensas-Alligator complex, undulating | 64K | Somewhat poorly drained | D | Very limited | Very limited |
| Water | 45K | Not rated | Not rated | ||
| Sharkey clay, 0 to 1 percent slopes, frequently flooded | 43K | Poorly drained | D | Very limited | Very limited |
| Sharkey clay, 0 to 1 percent slopes, occasionally flooded | 43K | Poorly drained | D | Very limited | Very limited |
| Alligator clay, 0 to 1 percent slopes, occasionally flooded | 33K | Poorly drained | D | Very limited | Very limited |
| Sharkey clay, 0 to 1 percent slopes, rarely flooded, south | 30K | Poorly drained | D | Very limited | Very limited |
| Commerce and Bruin soils, frequently flooded | 20K | Somewhat poorly drained | C | Very limited | Very limited |
| Alligator clay | 18K | Poorly drained | D | Very limited | Very limited |
| Tensas-Alligator complex, undulating, occasionally flooded | 17K | Somewhat poorly drained | D | Very limited | Very limited |
| Dundee-Alligator-Tensas complex, gently undulating | 12K | Somewhat poorly drained | D | Very limited | Very limited |
| Dundee loam | 12K | Somewhat poorly drained | C | Somewhat limited | Very limited |
| Newellton and Sharkey soils, frequently flooded | 12K | Somewhat poorly drained | D | Very limited | Very limited |
| Dundee-Alligator-Tensas complex, undulating | 11K | Somewhat poorly drained | D | Very limited | Very limited |
| Dowling clay, 0 to 1 percent slopes, frequently flooded, tensas | 11K | Very poorly drained | D | Very limited | Very limited |
| Tensas silty clay, 0 to 1 percent slopes, rarely flooded | 10K | Somewhat poorly drained | D | Very limited | Very limited |
| Commerce silt loam, 0 to 1 percent slopes | 9K | Somewhat poorly drained | C | Somewhat limited | Very limited |
| Tensas silty clay loam | 8K | Poorly drained | D | Very limited | Very limited |
| Alligator clay, gently undulating, occasionally flooded | 8K | Poorly drained | D | Very limited | Very limited |
| Tunica-Sharkey complex, gently undulating | 8K | Poorly drained | D | Very limited | Very limited |
| Sharkey clay, gently undulating, occasionally flooded | 7K | Poorly drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 84% 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. Poorly drained soils can't absorb septic effluent effectively. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Many soils hold water for extended periods. Raised beds are highly recommended to improve drainage for vegetables. Well-adapted native plants and water-loving species will do best in natural conditions.