FM 3478 over Trinity River
FairWalker County, Texas · 5.5 MI N of FM 980 · Structure no. 172360355001002
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 600 ft
- 6 main spans
- Daily traffic
- 713
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
FM 3478 over Trinity River is a prestressed concrete stringer/multi-beam or girder carrying FM 3478 over Trinity River in Walker County, Texas. It was built in 1996, so it is 29 years old, younger than the Texas average of 44.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 713 vehicles a day, roughly 20% of them trucks, projected to reach 998 by 2040. The structure is 600 ft (182.9 m) long and 32 ft wide. If it were closed, the detour would be 16.8 mi (27 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM 3478 over Trinity River built?
It was built in 1996, making it 29 years old in 2025.
What condition is FM 3478 over Trinity River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.
How much traffic does FM 3478 over Trinity River carry?
About 713 vehicles per day (2020 count), of which roughly 20% are trucks.
How long is FM 3478 over Trinity River?
The structure is 600 ft (182.9 m) long with a longest span of 100 ft (30.5 m) and a deck 32 ft wide.
Who owns FM 3478 over Trinity River?
It is owned by the State Highway Agency.