Total bridges
81
Public highway bridges in Trinity County
County profile · official public datasets
Trinity County, TX
81 public highway bridges tracked in the FHWA National Bridge Inventory: 55.6% rated Good, 40.7% Fair, 3.7% Poor.
- 81
- Public bridges
- 55.6%
- Good condition
- 3.7%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Trinity County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- 224th
- of 247 on Poor share
- 3.7%
- Poor-condition share
- 81
- public highway bridges
- 1975
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Trinity County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Trinity County ranks #224 of 247 Texas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.7%). Trinity County, Texas contains 81 public highway bridges. Roughly 55.6% are rated “Good,” 40.7% “Fair,” and 3.7% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Good condition
55.6%
45 of 81 rated 7-9
Fair condition
40.7%
33 of 81 rated 5-6
Poor condition
3.7%
3 of 81 rated 4 or below
In-state Poor-share rank
#224 of 247
Among Texas counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 81 NBI-tracked bridges by lowest applicable component rating.
Good 55.6% (45)
Fair 40.7% (33)
Poor 3.7% (3)
Trinity County's Poor-condition bridges carry 210 vehicle crossings a day
That is 0.2% of the county's reported daily bridge traffic on 3.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 70 crossings a day against 1,421 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 81 of 81 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
48.1% of Trinity County's bridges have passed the 50-year mark
39 of the 81 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 55.6% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 47.6% of the county's Poor-condition bridge traffic
ELMER SMITH RD over MOSSY CREEK, built 1988, carries 100 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 3-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 210 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Trinity County's bridges were built
81 bridges with a recorded construction year, grouped by decade
- 1920s 5
1920–1929
5 bridges
- 1930s 4
1930–1939
4 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s
1950–1959
16 bridges
- 1960s
1960–1969
10 bridges
- 1970s
1970–1979
7 bridges
- 1980s
1980–1989
8 bridges
- 1990s
1990–1999
14 bridges
- 2000s
2000–2009
8 bridges
- 2010s
2010–2019
8 bridges
What this shows Construction peaked in the 1950s, when 16 of the county's bridges still in the inventory were built, which is 19.8% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1975, 5 years older than the Texas average of 1980.
How Trinity County compares with Texas's closest counties by inventory size
The 5 Texas counties nearest Trinity County in number of bridges, with their condition splits. Its 3.7% Poor share is the 5th-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1963 is 12 years newer.
Showing the 5 closest of 246 Texas counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Llano County | 84 | 40.5% | 59.5% | 0% | 1953 |
| Hood County | 83 | 47% | 51.8% | 1.2% | 1974 |
| Trinity County (this page) | 81 | 55.6% | 40.7% | 3.7% | 1975 |
| Cottle County | 80 | 31.3% | 67.5% | 1.3% | 1960 |
| Haskell County | 80 | 46.3% | 52.5% | 1.3% | 1958 |
| Gray County | 79 | 29.1% | 65.8% | 5.1% | 1968 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Trinity County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Trinity County, both outside Texas so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside TX (81 bridges here).
- Berrien County, GA · 81 bridges
- Fayette County, GA · 81 bridges
- Sumter County, GA · 81 bridges
- White County, GA · 81 bridges
Similar average build year
Nearest mean year-built outside TX (1975 here).
- San Bernardino County, CA · avg 1975 · 1,422 bridges
- Lane County, OR · avg 1975 · 1,010 bridges
- Fulton County, GA · avg 1975 · 775 bridges
- Westmoreland County, PA · avg 1975 · 620 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (3)
ELMER SMITH RD
PoorOver: MOSSY CREEK
3.0 MI NE OF FM 358, Trinity, TX
Built 1988 Load: 10.0 t ADT: 100
REESE ROAD
PoorOver: TRIB PINEY CREEK
1.7 MI N OF FM 358, Trinity, TX
Built 1960 Load: 22.7 t ADT: 55
HAMILTON ROAD
PoorOver: TRIB OF JAMES CREEK
0.8 MI S OF FM 2262, Trinity, TX
Built 1960 Load: 24.5 t ADT: 55
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.