Adair County, Missouri
The dominant drainage class is Somewhat 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 Adair County, Missouri.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Armstrong loam, 5 to 9 percent slopes, eroded | 63K | Somewhat poorly drained | D | Very limited | Very limited |
| Winnegan loam, 20 to 35 percent slopes | 54K | Moderately well drained | D | Very limited | Very limited |
| Gara fine sandy loam, 14 to 20 percent slopes, eroded | 28K | Moderately well drained | B/D | Very limited | Very limited |
| Adco silt loam, 1 to 3 percent slopes | 22K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Armstrong clay loam, 9 to 14 percent slopes, moderately eroded | 21K | Somewhat poorly drained | D | Very limited | Very limited |
| Gorin-Winnegan complex, 5 to 14 percent slopes, eroded | 20K | Somewhat poorly drained | C | Very limited | Very limited |
| Dockery and Tice silt loams, 0 to 2 percent slopes, occasionally flooded | 16K | Somewhat poorly drained | C | Very limited | Very limited |
| Leonard silt loam, 1 to 6 percent slopes, eroded | 14K | Poorly drained | C/D | Very limited | Very limited |
| Gara fine sandy loam, 20 to 35 percent slopes, eroded | 12K | Moderately well drained | B/D | Very limited | Very limited |
| Vesser silt loam, 0 to 2 percent slopes, occasionally flooded | 12K | Poorly drained | C/D | Very limited | Very limited |
| Gara loam, 9 to 14 percent slopes, moderately eroded | 11K | Well drained | C | Somewhat limited | Very limited |
| Purdin clay loam, 14 to 20 percent slopes, eroded | 10K | Moderately well drained | D | Very limited | Very limited |
| Vanmeter silty clay loam, 14 to 30 percent slopes | 10K | Moderately well drained | D | Very limited | Very limited |
| Winnegan loam, 14 to 20 percent slopes, eroded | 10K | Moderately well drained | D | Very limited | Very limited |
| Purdin clay loam, 20 to 35 percent slopes, eroded | 7K | Moderately well drained | D | Very limited | Very limited |
| Zook silty clay loam, overwash, 0 to 2 percent slopes, occasionally flooded | 7K | Poorly drained | D | Very limited | Very limited |
| Bevier silty clay loam, 3 to 8 percent slopes | 6K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Vesser silt loam, 1 to 3 percent slopes, occasionaly flooded | 6K | Poorly drained | C/D | Very limited | Very limited |
| Vigar loam, 2 to 5 percent slopes, rarely flooded | 5K | Moderately well drained | C | Very limited | Very limited |
| Vigar-Zook-Excello complex, 1 to 5 percent slopes | 4K | Poorly drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 96% 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 100% 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.