Bair Road over Supply Creek
FairHumboldt County, California · 2 MI W of Loop RD · Structure no. 04C0115
- Built
- 1950
- 75 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 41 ft
- 1 main span
- Daily traffic
- 69
- 2009 count
- Owner
- County
- County Highway Agency
About this bridge
Bair Road over Supply Creek is a steel stringer/multi-beam or girder carrying Bair Road over Supply Creek in Humboldt County, California. It was built in 1950, so it is 75 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 69 vehicles a day, roughly 5% of them trucks, projected to reach 65 by 2041. The structure is 41 ft (12.5 m) long and 26 ft wide. If it were closed, the detour would be 47.2 mi (76 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 Bair Road over Supply Creek built?
It was built in 1950, making it 75 years old in 2025.
What condition is Bair Road over Supply 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 October 2023.
How much traffic does Bair Road over Supply Creek carry?
About 69 vehicles per day (2009 count), of which roughly 5% are trucks.
How long is Bair Road over Supply Creek?
The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 26 ft wide.
Who owns Bair Road over Supply Creek?
It is owned by the County Highway Agency.