Lafourche Parish, Louisiana
The dominant drainage class is Very 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 Lafourche Parish, Louisiana.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Water | 215K | Not rated | Not rated | ||
| Barbary muck, 0 to 1 percent slopes, frequently flooded | 97K | Very poorly drained | D | Very limited | Very limited |
| Timbalier-Bellpass association | 87K | Very poorly drained | A/D | Very limited | Very limited |
| Allemands muck, 0 to 0.2 percent slopes, very frequently flooded | 65K | Very poorly drained | A/D | Very limited | Very limited |
| Lafitte-Clovelly association, 0 to 0.2 percent slopes, very frequently flooded | 45K | Very poorly drained | A/D | Very limited | Very limited |
| Schriever clay, 0 to 1 percent slopes, rarely flooded | 44K | Poorly drained | D | Very limited | Very limited |
| Cancienne silt loam, 0 to 1 percent slopes | 38K | Somewhat poorly drained | C | Somewhat limited | Very limited |
| Allemands-Larose association | 38K | Very poorly drained | C/D | Very limited | Very limited |
| Kenner muck, 0 to 1 percent slopes, very frequently flooded | 38K | Very poorly drained | D | Very limited | Very limited |
| Fausse-Schriever association | 33K | Very poorly drained | D | Very limited | Very limited |
| Rita muck | 28K | Poorly drained | D | Very limited | Very limited |
| Cancienne silty clay loam, 0 to 1 percent slopes | 23K | Somewhat poorly drained | C | Somewhat limited | Very limited |
| Schriever clay, 0 to 1 percent slopes, occasionally flooded | 21K | Poorly drained | D | Very limited | Very limited |
| Scatlake muck, 0 to 0.2 percent slopes, tidal | 17K | Very poorly drained | D | Very limited | Very limited |
| Bellpass-Scatlake association | 13K | Very poorly drained | D | Very limited | Very limited |
| Allemands muck, 0 to 0.2 percent slopes, drained | 11K | Poorly drained | C | Very limited | Very limited |
| Schriever silty clay loam, 0 to 1 percent slopes | 6K | Poorly drained | D | Very limited | Very limited |
| Scatlake-Felicity association | 3K | Very poorly drained | C/D | Very limited | Very limited |
| Rita variant muck | 2K | Poorly drained | D | Very limited | Very limited |
| Vacherie silt loam, 0 to 1 percent slopes | 2K | Somewhat poorly drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 66% 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 73% 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.