Fannin County, Texas
The dominant drainage class is Moderately 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 Fannin County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Fairlie-Dalco complex, 1 to 3 percent slopes | 64K | Moderately well drained | D | Very limited | Very limited |
| Wilson silt loam, 0 to 1 percent slopes | 33K | Moderately well drained | C/D | Very limited | Very limited |
| Frioton silty clay loam, occasionally flooded | 29K | Well drained | C | Very limited | Very limited |
| Ivanhoe silt loam, 0 to 1 percent slopes | 29K | Somewhat poorly drained | D | Very limited | Very limited |
| Houston Black clay, 1 to 3 percent slopes | 27K | Moderately well drained | D | Very limited | Very limited |
| Ferris clay, 5 to 12 percent slopes, eroded | 23K | Well drained | D | Very limited | Very limited |
| Whitewright-Howe complex, 5 to 12 percent slopes, eroded | 18K | Well drained | D | Very limited | Very limited |
| Heiden-Ferris complex, 2 to 6 percent slopes, eroded | 18K | Well drained | D | Very limited | Very limited |
| Crockett loam, 1 to 3 percent slopes | 18K | Moderately well drained | D | Very limited | Very limited |
| Derly, occasionally ponded-Raino complex, 0 to 1 percent slopes | 17K | Poorly drained | D | Very limited | Very limited |
| Normangee clay loam, 1 to 3 percent slopes | 17K | Moderately well drained | C | Very limited | Very limited |
| Freestone-Hicota complex, 0 to 2 percent slopes | 16K | Moderately well drained | D | Very limited | Very limited |
| Leson clay, 1 to 3 percent slopes | 14K | Moderately well drained | D | Very limited | Very limited |
| Whakana very fine sandy loam, 5 to 12 percent slopes | 14K | Well drained | B | Somewhat limited | Somewhat limited |
| Tinn clay, 0 to 1 percent slopes, occasionally flooded | 13K | Moderately well drained | D | Very limited | Very limited |
| Tinn clay, 0 to 1 percent slopes, frequently flooded | 13K | Moderately well drained | D | Very limited | Very limited |
| Howe-Whitewright complex, 3 to 5 percent slopes | 13K | Well drained | C | Somewhat limited | Very limited |
| Fairlie clay, 0 to 1 percent slopes | 11K | Moderately well drained | D | Very limited | Very limited |
| Bonham silt loam, 1 to 3 percent slopes | 10K | Moderately well drained | C | Very limited | Very limited |
| Karma loam, 0 to 2 percent slopes | 10K | Well drained | B | Not 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, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 96% 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
Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.