Marion County, Indiana
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 Marion County, Indiana.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Crosby silt loam, fine-loamy subsoil-Urban land complex, 0 to 2 percent slopes | 40K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Brookston silty clay loam-Urban land complex, 0 to 2 percent slopes | 22K | Poorly drained | B/D | Very limited | Very limited |
| Miami silt loam-Urban land complex, 2 to 6 percent slopes, eroded | 19K | Moderately well drained | C | Very limited | Very limited |
| Udorthents, cut and filled | 14K | Well drained | Not rated | Not rated | |
| Crosby silt loam, fine-loamy subsoil, 0 to 2 percent slopes | 14K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Crosby-Urban land-Treaty complex, fine-loamy subsoil, 0 to 2 percent slopes | 12K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Miami-Urban land complex, 0 to 6 percent slopes | 10K | Moderately well drained | C | Somewhat limited | Very limited |
| Fox-Urban land complex, 0 to 3 percent slopes | 9K | Well drained | B | Somewhat limited | Very limited |
| Treaty silty clay loam, 0 to 1 percent slopes | 9K | Poorly drained | B/D | Very limited | Very limited |
| Urban land-Crosby silt loam complex, fine-loamy subsoil, 0 to 2 percent slopes | 9K | Not rated | Not rated | ||
| Miami silt loam, 2 to 6 percent slopes, eroded | 8K | Moderately well drained | C | Very limited | Very limited |
| Water | 8K | Not rated | Not rated | ||
| Gessie silt loam, 0 to 2 percent slopes, frequently flooded, brief duration | 7K | Well drained | B | Very limited | Very limited |
| Urban land-Brookston complex, 0 to 2 percent slopes | 6K | Not rated | Not rated | ||
| Urban land-Fox loam complex, 0 to 2 percent slopes | 5K | Not rated | Not rated | ||
| Genesee-Urban land complex, 0 to 2 percent slopes, frequently flooded, brief duration | 5K | Well drained | B | Very limited | Very limited |
| Miami silt loam-Urban land complex, 6 to 12 percent slopes, eroded | 4K | Moderately well drained | C | Very limited | Very limited |
| Miami silt loam, 6 to 12 percent slopes, eroded | 3K | Moderately well drained | C | Very limited | Very limited |
| Brookston-Urban land complex, 0 to 2 percent slopes | 3K | Poorly drained | B/D | Very limited | Very limited |
| Gessie silt loam-Urban land complex, 0 to 2 percent slopes, frequently flooded, brief duration | 3K | Well drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 70% 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 80% 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.