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Trinidad, Texas
Inside Trinidad's city limits, shrink-swell clay limits houses without basements on 62% of mapped land, higher than 67% of Texas cities. A shallow water table limits basements on 35%.
That clay share is above Henderson County's 25%. FEMA's flood data list 2 flood losses since 2016 in ZIP code 75163 overlapping the city. Of its 390 homes, 75% were built before 1980; the median dates from 1971.
Data as of October 13, 2026 · sources · in Henderson County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 1 overlapping ZIP
of homes built before 1980
Foundation repair in Trinidad
Foundation repair in Trinidad: shrink-swell clay limits slab homes on 62% of Trinidad's mapped land, more than in 67% of Texas cities.
About 300 of Trinidad's 390 homes are detached houses.
| Who designs the repair | The ASCE Texas Section's repair guidelines say a Texas-licensed engineer should evaluate the foundation and design the repair (2022 guidelines) |
| Prices | Cost guide ranges compared |
Soil under Trinidad city limits
| Expansive clay (limits slab homes) | 62.0% |
| High water table (limits basements) | 34.5% |
| Septic fields very limited | 83.4% |
| Clay swell (LEP, by area) | 8.1% |
| High-swell land (LEP 6%+) | 65.5% |
| Mapped soil | 9,682 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Trinity | 18% | n/a |
| Deport | 13% | n/a |
| Kaufman | 10% | n/a |
| Axtell | 10% | 89% |
| Dutek | 8% | n/a |
| Gladewater | 8% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 8.1% by land area here, and 65% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 62% of the mapped land.
Clay shrinks as it dries: 100% of Henderson County is in drought on the latest map, and 62% of Trinidad's mapped land has shrink-swell clay.
On 35% of Trinidad's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 83% of the land very limited for septic absorption fields.
Drought in Henderson County
100% of Henderson County is in drought (D1 or worse) on the October 13, 2026 map. County detail.
Flood losses by ZIP code
FEMA flood records since 2016 in the ZIP codes that overlap Trinidad. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75163 | 100% | 2 | $0 |
Homes in Trinidad
| Housing units | 390 |
| Median year built | 1971 |
| Built before 1980 | 75% |
| Built 2000 or later | 15% |
| Owner-occupied | 68% |
| Median value, owner-occupied | $146,900 |
| Single-family detached | 85% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Star Harbor | 4 mi | 52% | 36% |
| Malakoff | 5 mi | 68% | 43% |
| Caney City | 5 mi | 24% | 64% |
| Log Cabin | 7 mi | 78% | 13% |
| Kerens | 7 mi | 88% | 43% |
| Goodlow | 7 mi | 74% | 24% |
| Enchanted Oaks | 7 mi | 81% | 10% |
| Payne Springs | 9 mi | 69% | 47% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · Census ACS 2020-2024. Methods · Data status