SH 105 over Trinity River
Liberty County, Texas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SH 105 over Trinity River in Liberty County, Texas, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1967, making it 58 years old at the 2025 inventory.
- It carries about 4,651 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 110 of the 240 inventoried bridges in Liberty County rated fair (45.8%); 4 (1.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: superstructure 6 to 7.
- Its most recent inspection on record is dated April 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (30.27748, -94.79778)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 7 | Good condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 1,350 ft |
| Location | 4.0 Mi NW of SH 146 |
| NBI structure number | 201460095101004 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in Liberty County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 59 over Atsf RR & Drain | 1987 | 35,560 | Good |
| US 59 over Sl 573 | 1987 | 33,938 | Good |
| US 59 over SL 573 & Ditch | 1987 | 29,958 | Fair |
| US 59 over Drainage Ditch | 1987 | 29,958 | Fair |
| US 59 Ml & Sbfr over Drainage Ditch | 1987 | 29,124 | Good |
| US 59 Ml & Sbfr over Little Tarkington Bayou | 1987 | 29,124 | Fair |
All bridges nearby: Liberty County, TX bridge conditions · every bridge in Liberty County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.