State Route 3 over Trinity River
FairTrinity County, California · 02-TRI-003-78.11 · Structure no. 05 0064
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 313 ft
- 2 main spans
- Daily traffic
- 200
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 3 over Trinity River is a prestressed concrete continuous box beam or girders - multiple carrying State Route 3 over Trinity River in Trinity County, California. It was built in 1971, so it is 54 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 200 vehicles a day, roughly 35% of them trucks, projected to reach 317 by 2046. The structure is 313 ft (95.4 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 3 over Trinity River built?
It was built in 1971, making it 54 years old in 2025.
What condition is State Route 3 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 August 2024.
How much traffic does State Route 3 over Trinity River carry?
About 200 vehicles per day (2009 count), of which roughly 35% are trucks.
How long is State Route 3 over Trinity River?
The structure is 313 ft (95.4 m) long with a longest span of 155 ft (47.2 m) and a deck 34 ft wide.
Who owns State Route 3 over Trinity River?
It is owned by the State Highway Agency.