Fort Seward Road over Dobbyn Creek
FairHumboldt County, California · 1.5 MI W Alder Point RD · Structure no. 04C0152
- Built
- 1960
- 65 years old, rebuilt 1967
- Condition
- Fair
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 168 ft
- 3 main spans
- Daily traffic
- 38
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
Fort Seward Road over Dobbyn Creek is a steel stringer/multi-beam or girder carrying Fort Seward Road over Dobbyn Creek in Humboldt County, California. It was built in 1960 and reconstructed in 1967, so it is 65 years old, older 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 38 vehicles a day, roughly 2% of them trucks, projected to reach 51 by 2042. The structure is 168 ft (51.2 m) long and 29 ft wide. If it were closed, the detour would be 28 mi (45 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Fort Seward Road over Dobbyn Creek built?
It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1967.
What condition is Fort Seward Road over Dobbyn Creek 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 February 2024.
How much traffic does Fort Seward Road over Dobbyn Creek carry?
About 38 vehicles per day (2011 count), of which roughly 2% are trucks.
How long is Fort Seward Road over Dobbyn Creek?
The structure is 168 ft (51.2 m) long with a longest span of 55 ft (16.9 m) and a deck 29 ft wide.
Who owns Fort Seward Road over Dobbyn Creek?
It is owned by the County Highway Agency.