Clinton 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 Clinton County, Illinois.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Hoyleton-Darmstadt silt loams, 0 to 2 percent slopes | 28K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Water | 20K | Not rated | Not rated | ||
| Cisne-Huey silt loams, 0 to 2 percent slopes | 19K | Poorly drained | C/D | Very limited | Very limited |
| Wakeland silt loam, 0 to 2 percent slopes, frequently flooded | 18K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Birds silt loam, 0 to 2 percent slopes, frequently flooded | 17K | Poorly drained | C/D | Very limited | Very limited |
| Oconee-Darmstadt silt loams, 0 to 2 percent slopes | 15K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Hoyleton-Darmstadt silt loams, 2 to 5 percent slopes, eroded | 14K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Cowden silt loam, 0 to 2 percent slopes | 11K | Poorly drained | C/D | Very limited | Very limited |
| Virden-Piasa silt loams, 0 to 2 percent slopes | 11K | Poorly drained | C/D | Very limited | Very limited |
| Oconee-Darmstadt complex, 2 to 5 percent slopes, eroded | 10K | Somewhat poorly drained | D | Very limited | Very limited |
| Beaucoup silt loam, frequently flooded | 9K | Poorly drained | C/D | Very limited | Very limited |
| Herrick silt loam, 0 to 2 percent slopes | 9K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Muren silt loam, 2 to 5 percent slopes, eroded | 8K | Moderately well drained | B | Somewhat limited | Somewhat limited |
| Iva silt loam | 8K | Somewhat poorly drained | C | Very limited | Very limited |
| Oconee silt loam, 0 to 2 percent slopes | 8K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Cisne silt loam, 0 to 2 percent slopes | 7K | Poorly drained | C/D | Very limited | Very limited |
| Bluford silt loam, 0 to 2 percent slopes | 7K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Cowden-Piasa complex | 7K | Poorly drained | C/D | Very limited | Very limited |
| Blair silt loam, 5 to 10 percent slopes, eroded | 7K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Petrolia silty clay loam, 0 to 2 percent slopes, frequently flooded | 6K | Poorly drained | C/D | Very limited | Very limited |
What This Means
Building & Foundations
About 88% 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 88% 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.