Coleman County, Texas
The dominant drainage class is 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 Coleman County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Tarrant and Purves soils, undulating | 144K | Well drained | D | Very limited | Very limited |
| Leeray clay, 1 to 3 percent slopes | 67K | Well drained | D | Very limited | Very limited |
| Kavett and Talpa soils, undulating | 57K | Well drained | D | Very limited | Very limited |
| Stony land and Owens soils, moderately steep | 52K | D | Very limited | Very limited | |
| Purves and Owens soils, undulating | 48K | Well drained | D | Very limited | Very limited |
| Kavett silty clay, cool, 1 to 3 percent slopes | 41K | Well drained | D | Very limited | Very limited |
| Frio clay loam, frequently flooded | 33K | Well drained | C | Very limited | Very limited |
| Valera clay, 1 to 3 percent slopes | 30K | Well drained | C | Very limited | Very limited |
| Tarrant soils, undulating | 29K | Well drained | D | Very limited | Very limited |
| Speck and Tarrant soils, undulating | 27K | Well drained | D | Very limited | Very limited |
| Sagerton clay loam, warm, 1 to 3 percent slopes | 27K | Well drained | C | Somewhat limited | Very limited |
| Rowena clay loam, 1 to 3 percent slopes | 27K | Well drained | C | Somewhat limited | Very limited |
| Frio clay loam, 0 to 1 percent slopes, occasionally flooded | 23K | Well drained | C | Very limited | Very limited |
| Lindy clay loam, 1 to 3 percent slopes | 18K | Well drained | D | Very limited | Very limited |
| Nukrum clay, 1 to 3 percent slopes | 16K | Well drained | C | Very limited | Very limited |
| Leeray clay, 0 to 1 percent slopes | 15K | Well drained | D | Very limited | Very limited |
| Rowena clay loam, 0 to 1 percent slopes | 15K | Well drained | C | Somewhat limited | Very limited |
| Water | 12K | D | Not rated | Not rated | |
| Cho and Mereta soils, undulating | 12K | Well drained | D | Very limited | Very limited |
| Nuvalde clay loam, cool, 1 to 3 percent slopes | 12K | Well drained | C | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 86% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 98% 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.