Alderpoint Road over North Dobbyn Creek
FairHumboldt County, California · 5 MI N/O Alderpoint · Structure no. 04C0105
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 104 ft
- 1 main span
- Daily traffic
- 201
- 2008 count
- Owner
- County
- County Highway Agency
About this bridge
Alderpoint Road over North Dobbyn Creek is a steel stringer/multi-beam or girder carrying Alderpoint Road over North Dobbyn Creek in Humboldt County, California. It was built in 1966, so it is 59 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 201 vehicles a day, roughly 1% of them trucks, projected to reach 327 by 2042. The structure is 104 ft (31.7 m) long and 29 ft wide. If it were closed, the detour would be 26.1 mi (42 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| 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 Alderpoint Road over North Dobbyn Creek built?
It was built in 1966, making it 59 years old in 2025.
What condition is Alderpoint Road over North 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 Alderpoint Road over North Dobbyn Creek carry?
About 201 vehicles per day (2008 count), of which roughly 1% are trucks.
How long is Alderpoint Road over North Dobbyn Creek?
The structure is 104 ft (31.7 m) long with a longest span of 100 ft (30.5 m) and a deck 29 ft wide.
Who owns Alderpoint Road over North Dobbyn Creek?
It is owned by the County Highway Agency.