Seneca Road over North Fork Feather River
FairPlumas County, California · 5.6 MI S of SH 89 · Structure no. 09C0043
- Built
- 1983
- 42 years old
- Condition
- Fair
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 86 ft
- 1 main span
- Daily traffic
- 80
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
Seneca Road over North Fork Feather River is a concrete box beam or girders - multiple carrying Seneca Road over North Fork Feather River in Plumas County, California. It was built in 1983, so it is 42 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 80 vehicles a day, roughly 2% of them trucks, projected to reach 157 by 2041. The structure is 86 ft (26.2 m) long and 25 ft wide. If it were closed, the detour would be 24.2 mi (39 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Seneca Road over North Fork Feather River built?
It was built in 1983, making it 42 years old in 2025.
What condition is Seneca Road over North Fork Feather 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 September 2023.
How much traffic does Seneca Road over North Fork Feather River carry?
About 80 vehicles per day (2019 count), of which roughly 2% are trucks.
How long is Seneca Road over North Fork Feather River?
The structure is 86 ft (26.2 m) long with a longest span of 85 ft (25.9 m) and a deck 25 ft wide.
Who owns Seneca Road over North Fork Feather River?
It is owned by the County Highway Agency.