Bel Marin Keys Bl over Arroyo San Jose
FairMarin County, California · Just N Commercial DR · Structure no. 27C0086
- Built
- 1970
- 55 years old, rebuilt 1987
- Condition
- Fair
- inspected July 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 57 ft
- 4 main spans
- Daily traffic
- 20,883
- 2010 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Bel Marin Keys Bl over Arroyo San Jose is a concrete continuous culvert carrying Bel Marin Keys Bl over Arroyo San Jose in Marin County, California. It was built in 1970 and reconstructed in 1987, so it is 55 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 20,883 vehicles a day, roughly 2% of them trucks, projected to reach 22,545 by 2046. The structure is 57 ft (17.4 m) long and 86 ft wide. If it were closed, the detour would be 123.7 mi (199 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Bel Marin Keys Bl over Arroyo San Jose built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1987.
What condition is Bel Marin Keys Bl over Arroyo San Jose 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 July 2024.
How much traffic does Bel Marin Keys Bl over Arroyo San Jose carry?
About 20,883 vehicles per day (2010 count), of which roughly 2% are trucks.
How long is Bel Marin Keys Bl over Arroyo San Jose?
The structure is 57 ft (17.4 m) long with a longest span of 14 ft (4.3 m) and a deck 86 ft wide.
Who owns Bel Marin Keys Bl over Arroyo San Jose?
It is owned by the City or Municipal Highway Agency.