State Route 299 over Trinity River
FairTrinity County, California · 02-TRI-299-R58.00 · Structure no. 05 0018
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 817 ft
- 8 main spans
- Daily traffic
- 4,450
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 299 over Trinity River is a concrete continuous box beam or girders - multiple carrying State Route 299 over Trinity River in Trinity County, California. It was built in 1980, so it is 45 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 4,450 vehicles a day, roughly 9% of them trucks, projected to reach 7,779 by 2040. The structure is 817 ft (249 m) long and 44 ft wide. If it were closed, the detour would be 29.2 mi (47 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 299 over Trinity River built?
It was built in 1980, making it 45 years old in 2025.
What condition is State Route 299 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 March 2023.
How much traffic does State Route 299 over Trinity River carry?
About 4,450 vehicles per day (2009 count), of which roughly 9% are trucks.
How long is State Route 299 over Trinity River?
The structure is 817 ft (249 m) long with a longest span of 115 ft (35.1 m) and a deck 44 ft wide.
Who owns State Route 299 over Trinity River?
It is owned by the State Highway Agency.