State Route 255 over Marina Road
FairHumboldt County, California · 01-HUM-255-0.66-EUR · Structure no. 04 0281
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected September 2023
- Type
- Arch - Deck
- Steel
- Length
- 26 ft
- 1 main span
- Daily traffic
- 7,300
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 255 over Marina Road is a steel arch - deck carrying State Route 255 over Marina Road in Humboldt County, California. It was built in 1979, so it is 46 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 7,300 vehicles a day, roughly 9% of them trucks, projected to reach 8,941 by 2041. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 16.2 mi (26 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 |
|---|---|---|
| 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 255 over Marina Road built?
It was built in 1979, making it 46 years old in 2025.
What condition is State Route 255 over Marina Road 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 State Route 255 over Marina Road carry?
About 7,300 vehicles per day (2010 count), of which roughly 9% are trucks.
How long is State Route 255 over Marina Road?
The structure is 26 ft (7.8 m) long with a longest span of 26 ft (7.8 m).
Who owns State Route 255 over Marina Road?
It is owned by the State Highway Agency.