Sarpy County, Nebraska
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate 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 Sarpy County, Nebraska.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Contrary-Marshall silty clay loams, 6 to 11 percent slopes | 36K | Well drained | C | Somewhat limited | Very limited |
| Marshall-Contrary silty clay loams, 2 to 7 percent slopes | 20K | Well drained | C | Somewhat limited | Very limited |
| Contrary-Monona-Ida complex, 6 to 17 percent slopes | 12K | Well drained | C | Somewhat limited | Very limited |
| Judson silty clay loam, 2 to 6 percent slopes | 10K | Well drained | C | Somewhat limited | Very limited |
| Urban land-Udorthents-Pohocco complex, 0 to 16 percent slopes | 9K | Somewhat limited | Somewhat limited | ||
| Smithland-Kenridge silty clay loams, occasionally flooded | 6K | Somewhat poorly drained | C | Very limited | Very limited |
| Water | 6K | Not rated | Not rated | ||
| Contrary-Monona silty clay loams, 6 to 11 percent slopes | 5K | Well drained | C | Somewhat limited | Very limited |
| Kennebec silt loam, occasionally flooded | 5K | Moderately well drained | B | Very limited | Very limited |
| Urban land-Udarents complex, 0 to 16 percent slopes | 5K | Not rated | Not rated | ||
| Urban land-Udorthents-Marshall complex, 0 to 9 percent slopes | 4K | Not rated | Not rated | ||
| Judson-Nodaway channeled-Contrary complex, 0 to 12 percent slopes | 3K | Well drained | C | Somewhat limited | Very limited |
| Gibbon-Wann complex, occasionally flooded | 3K | Somewhat poorly drained | C | Very limited | Very limited |
| Udarents-Urban land complex, 1 to 14 percent slopes | 2K | Not limited | Not limited | ||
| Gibbon loamy sand, overwash, 0 to 2 percent slopes, occasionally flooded | 2K | Somewhat poorly drained | C | Very limited | Very limited |
| Urban land-Udorthents complex, drainageway, 0 to 8 percent slopes, occasionally flooded | 2K | Not rated | Not rated | ||
| Monona-Pohocco-Ida silt loams, 17 to 33 percent slopes | 2K | Well drained | B | Very limited | Very limited |
| Alda-Platte complex, occasionally flooded | 2K | Somewhat poorly drained | C | Very limited | Very limited |
| Pohocco-Ida-Monona complex, 6 to 17 percent slopes | 2K | Well drained | B | Somewhat limited | Somewhat limited |
| Onawa silty clay, occasionally flooded | 1K | Somewhat poorly drained | D | Very limited | Very limited |
What This Means
Building & Foundations
Most soils are generally favorable for residential construction. Standard foundations are usually viable, though site-specific evaluation is always recommended.
Septic Systems
About 78% 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.