Grant Parish, Louisiana
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Grant Parish, Louisiana.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Smithdale fine sandy loam, 5 to 12 percent slopes | 67K | Well drained | B | Somewhat limited | Very limited |
| Ruston fine sandy loam, 1 to 5 percent slopes | 55K | Well drained | B | Not limited | Very limited |
| Guyton and Cascilla soils, frequently flooded | 41K | Poorly drained | C/D | Very limited | Very limited |
| Glenmora silt loam, 1 to 3 percent slopes | 30K | Moderately well drained | C | Very limited | Very limited |
| Malbis fine sandy loam, 1 to 5 percent slopes | 30K | Moderately well drained | C | Somewhat limited | Very limited |
| Cadeville very fine sandy loam, 5 to 12 percent slopes | 29K | Moderately well drained | D | Very limited | Very limited |
| Caddo silt loam | 18K | Poorly drained | C/D | Very limited | Very limited |
| Gore silt loam, 5 to 12 percent slopes | 18K | Moderately well drained | D | Very limited | Very limited |
| Water | 15K | D | Not rated | Not rated | |
| Ruston-Smithdale association, moderately rolling | 12K | Well drained | B | Not limited | Somewhat limited |
| Cadeville very fine sandy loam, 2 to 5 percent slopes | 11K | Moderately well drained | D | Very limited | Very limited |
| Una silty clay, frequently flooded | 9K | Poorly drained | D | Very limited | Very limited |
| Metcalf very fine sandy loam | 8K | Somewhat poorly drained | C | Very limited | Very limited |
| Guyton silt loam, 0 to 1 percent slopes | 7K | Poorly drained | C/D | Very limited | Very limited |
| Gore silt loam, 1 to 5 percent slopes, moist | 7K | Moderately well drained | D | Very limited | Very limited |
| Kolin silt loam, 1 to 3 percent slopes | 6K | Somewhat poorly drained | C | Very limited | Very limited |
| Moreland clay, 0 to 1 percent slopes, rarely flooded | 6K | Somewhat poorly drained | D | Very limited | Very limited |
| Moreland clay, 0 to 3 percent slopes, rarely flooded | 5K | Somewhat poorly drained | D | Very limited | Very limited |
| Rigolette-Kisatchie association, hilly | 5K | Somewhat poorly drained | D | Very limited | Very limited |
| Ruston-Cadeville association, moderately rolling | 5K | Well drained | B | Not limited | Somewhat limited |
What This Means
Building & Foundations
About 52% 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 91% 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.