Richland 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 Richland Parish, Louisiana.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Perry clay | 33K | Poorly drained | D | Very limited | Very limited |
| Gilbert silt loam | 30K | Poorly drained | D | Very limited | Very limited |
| Gigger-Gilbert silt loams, gently undulating | 22K | Moderately well drained | C/D | Very limited | Very limited |
| Gilbert-Egypt silt loams, gently undulating | 21K | Poorly drained | D | Very limited | Very limited |
| Necessity-Gilbert silt loams, gently undulating | 20K | Somewhat poorly drained | D | Very limited | Very limited |
| Forestdale silty clay loam, 0 to 1 percent slopes, rarely flooded, upland phase | 18K | Poorly drained | C/D | Very limited | Very limited |
| Grenada-Calhoun silt loams complex, 0 to 3 percent slopes | 17K | Moderately well drained | C/D | Very limited | Very limited |
| Rilla-Hebert silt loams complex, 0 to 3 percent slopes | 17K | Well drained | B | Somewhat limited | Somewhat limited |
| Dexter silt loam, 1 to 3 percent slopes | 16K | Well drained | B | Not limited | Very limited |
| Perry clay, 0 to 1 percent slopes, occasionally flooded, Arkansas River | 14K | Poorly drained | D | Very limited | Very limited |
| Hebert silt loam, 0 to 1 percent slopes | 13K | Somewhat poorly drained | C | Very limited | Very limited |
| Rilla silt loam, 0 to 1 percent slopes | 12K | Well drained | B | Somewhat limited | Somewhat limited |
| Forestdale silty clay loam, 0 to 1 percent slope, occasionally flooded, upland phase | 11K | Poorly drained | C/D | Very limited | Very limited |
| Portland clay | 11K | Somewhat poorly drained | D | Very limited | Very limited |
| Portland silty clay loam | 9K | Somewhat poorly drained | D | Very limited | Very limited |
| Calhoun silt loam | 8K | Poorly drained | C/D | Very limited | Very limited |
| Sterlington-Hebert silt loams, gently undulating | 8K | Well drained | B | Not limited | Somewhat limited |
| Hebert silty clay loam, 0 to 1 percent slopes | 7K | Somewhat poorly drained | C | Very limited | Very limited |
| Water | 6K | Not rated | Not rated | ||
| Foley silt loam | 6K | Poorly drained | D | Very limited | Very 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 85% 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.