Harrison County, Iowa
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Harrison County, Iowa.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Ida silt loam, 14 to 20 percent slopes, severely eroded | 39K | Well drained | B | Very limited | Very limited |
| Napier silt loam, 5 to 9 percent slopes | 36K | Well drained | B | Not limited | Somewhat limited |
| Napier silt loam, 2 to 5 percent slopes | 33K | Well drained | B | Not limited | Somewhat limited |
| Monona silt loam, 9 to 14 percent slopes, eroded | 25K | Well drained | B | Somewhat limited | Somewhat limited |
| Monona silt loam, 5 to 9 percent slopes, eroded | 20K | Well drained | B | Not limited | Somewhat limited |
| Monona silt loam, 2 to 5 percent slopes | 18K | Well drained | B | Not limited | Somewhat limited |
| Ida silt loam, 9 to 14 percent slopes, severely eroded | 18K | Well drained | B | Somewhat limited | Somewhat limited |
| Luton silty clay, thin surface | 16K | Poorly drained | D | Very limited | Very limited |
| Albaton silty clay, 0 to 2 percent slopes, occasionally flooded | 16K | Poorly drained | D | Very limited | Very limited |
| Monona silt loam, 5 to 9 percent slopes | 15K | Well drained | B | Not limited | Somewhat limited |
| Ida silt loam, 20 to 30 percent slopes, severely eroded | 13K | Well drained | B | Very limited | Very limited |
| McPaul silt loam | 13K | Well drained | B | Very limited | Very limited |
| Luton silty clay | 11K | Poorly drained | D | Very limited | Very limited |
| Dockery-Quiver silt loams, deep loess, 0 to 2 percent slopes, occasionally flooded | 10K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Monona silt loam, 14 to 20 percent slopes, eroded | 10K | Well drained | B | Very limited | Very limited |
| Haynie silt loam, 0 to 2 percent slopes, occasionally flooded | 10K | Moderately well drained | B | Very limited | Very limited |
| Kennebec silt loam, 0 to 2 percent slopes, occasionally flooded, overwash | 9K | Moderately well drained | B | Very limited | Very limited |
| Kennebec silt loam, 0 to 2 percent slopes, occasionally flooded | 9K | Moderately well drained | B | Very limited | Very limited |
| Napier silt loam, 9 to 14 percent slopes | 7K | Well drained | B | Somewhat limited | Somewhat limited |
| Hamburg silt loam, 40 to 75 percent slopes | 6K | Somewhat excessively drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 48% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 48% of soils have significant septic limitations, while others are more suitable. A perc test is essential — conditions vary across the area.
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.