State Route 299 over Manzanita Creek
GoodTrinity County, California · 02-TRI-299-28.99 · Structure no. 05 0009
- Built
- 1923
- 102 years old, rebuilt 1973
- Condition
- Good
- inspected March 2023
- Type
- Tee Beam
- Concrete
- Length
- 54 ft
- 1 main span
- Daily traffic
- 3,650
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 299 over Manzanita Creek is a concrete tee beam carrying State Route 299 over Manzanita Creek in Trinity County, California. It was built in 1923 and reconstructed in 1973, so it is 102 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 3,650 vehicles a day, roughly 29% of them trucks, projected to reach 2,760 by 2045. The structure is 54 ft (16.5 m) long and 35 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 299 over Manzanita Creek built?
It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1973.
What condition is State Route 299 over Manzanita Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.
How much traffic does State Route 299 over Manzanita Creek carry?
About 3,650 vehicles per day (2009 count), of which roughly 29% are trucks.
How long is State Route 299 over Manzanita Creek?
The structure is 54 ft (16.5 m) long with a longest span of 53 ft (16.1 m) and a deck 35 ft wide.
Who owns State Route 299 over Manzanita Creek?
It is owned by the State Highway Agency.