Warren County, Missouri
The dominant drainage class is Well 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 Warren County, Missouri.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Keswick silt loam, 9 to 14 percent slopes, eroded | 29K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Goss very gravelly silt loam, 14 to 45 percent slopes | 26K | Well drained | C | Very limited | Very limited |
| Keswick silt loam, 5 to 9 percent slopes, eroded | 21K | Somewhat poorly drained | D | Very limited | Very limited |
| Hatton silt loam, 3 to 9 percent slopes | 20K | Moderately well drained | D | Very limited | Very limited |
| Gasconade-Rock outcrop complex, 14 to 50 percent slopes, rubbly | 19K | Somewhat excessively drained | D | Very limited | Very limited |
| Mexico silt loam, 1 to 4 percent slopes, eroded | 17K | Poorly drained | D | Very limited | Very limited |
| Armster silt loam, 2 to 7 percent slopes | 14K | Moderately well drained | D | Very limited | Very limited |
| Lindley loam, 14 to 40 percent slopes | 12K | Well drained | C | Very limited | Very limited |
| Holstein-Rock outcrop complex, 14 to 35 percent slopes | 12K | Well drained | C | Very limited | Very limited |
| Chilhowie, Gasconade, and Crider soils, 14 to 35 percent slopes | 6K | Well drained | D | Very limited | Very limited |
| Winfield silt loam, 9 to 14 percent slopes, eroded | 6K | Moderately well drained | C | Somewhat limited | Very limited |
| Peers silty clay loam, 0 to 2 percent slopes, occasionally flooded | 6K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Water | 6K | Subaqueous | Not rated | Not rated | |
| Peers-Lowmo-SansDessein complex, 0 to 2 percent slopes, occasionally flooded | 5K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Cedargap silt loam, 0 to 2 percent slopes, frequently flooded, cool | 5K | Well drained | B | Very limited | Very limited |
| Mexico silt loam, 0 to 2 percent slopes | 4K | Poorly drained | D | Very limited | Very limited |
| Menfro silt loam, 9 to 14 percent slopes, eroded | 4K | Well drained | B | Somewhat limited | Somewhat limited |
| Lowmo silt loam, 0 to 2 percent slopes, occasionally flooded | 3K | Well drained | B | Very limited | Very limited |
| Menfro silt loam, 5 to 9 percent slopes, eroded | 3K | Well drained | C | Somewhat limited | Very limited |
| Winfield silt loam, 14 to 20 percent slopes, eroded | 3K | Moderately well drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 91% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 95% 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
Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.