Gallatin County, Illinois
The dominant drainage class is Somewhat poorly drained and the dominant hydrologic group is C/D (varies with drainage). 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 Gallatin County, Illinois.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Patton silty clay loam, 0 to 2 percent slopes | 14K | Poorly drained | B/D | Very limited | Very limited |
| Reesville silt loam, 0 to 2 percent slopes | 13K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Allison silty clay loam, 0 to 2 percent slopes, frequently flooded | 9K | Well drained | B | Very limited | Very limited |
| Wellston-Berks complex, 12 to 60 percent slopes, eroded | 9K | Well drained | B | Very limited | Very limited |
| Wakeland silt loam, 0 to 2 percent slopes, occasionally flooded | 8K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Karnak silty clay, undrained, 0 to 2 percent slopes, frequently flooded | 7K | Very poorly drained | C/D | Very limited | Very limited |
| Marissa silt loam, 0 to 2 percent slopes | 7K | Somewhat poorly drained | C | Very limited | Very limited |
| Sexton silt loam | 6K | Poorly drained | C/D | Very limited | Very limited |
| Tice silty clay loam, 0 to 2 percent slopes, frequently flooded | 6K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Karnak silty clay, 0 to 2 percent slopes, occasionally flooded | 6K | Poorly drained | C/D | Very limited | Very limited |
| Alford silt loam, 5 to 10 percent slopes, eroded | 6K | Well drained | B | Not limited | Somewhat limited |
| Hosmer silt loam, 5 to 10 percent slopes, eroded | 6K | Moderately well drained | C/D | Very limited | Very limited |
| McGary silt loam, 0 to 2 percent slope | 4K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Montgomery silty clay, 0 to 2 percent slopes | 4K | Very poorly drained | C/D | Very limited | Very limited |
| Uniontown silt loam, 2 to 4 percent slopes | 4K | Well drained | B | Somewhat limited | Somewhat limited |
| Reesville silt loam, 2 to 5 percent slopes | 4K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Water | 3K | Not rated | Not rated | ||
| Emma silty clay loam, 0 to 2 percent slopes, occasionally flooded | 3K | Moderately well drained | C | Very limited | Very limited |
| Alvin fine sandy loam, 2 to 5 percent slopes | 3K | Well drained | A | Not limited | Very limited |
| Belknap silt loam, 0 to 2 percent slopes, frequently flooded | 3K | Somewhat poorly drained | B/D | Very limited | Very limited |
What This Means
Building & Foundations
About 86% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, 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.