SR 255 over U.S. Highway 101
FairHumboldt County, California · 01-HUM-255-8.77-ARC · Structure no. 04 0049
- Built
- 1965
- 60 years old
- Condition
- Fair
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 328 ft
- 4 main spans
- Daily traffic
- 12,200
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
SR 255 over U.S. Highway 101 is a concrete continuous box beam or girders - multiple carrying SR 255 over U.S. Highway 101 in Humboldt County, California. It was built in 1965, so it is 60 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 6 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 12,200 vehicles a day, roughly 8% of them trucks, projected to reach 18,875 by 2041. The structure is 328 ft (100 m) long and 58 ft wide. If it were closed, the detour would be 5 mi (8 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 255 over U.S. Highway 101 built?
It was built in 1965, making it 60 years old in 2025.
What condition is SR 255 over U.S. Highway 101 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 SR 255 over U.S. Highway 101 carry?
About 12,200 vehicles per day (2010 count), of which roughly 8% are trucks.
How long is SR 255 over U.S. Highway 101?
The structure is 328 ft (100 m) long with a longest span of 108 ft (32.9 m) and a deck 58 ft wide.
Who owns SR 255 over U.S. Highway 101?
It is owned by the State Highway Agency.