W Castlewood Drive over San Rafael Bay Inlet
GoodMarin County, California · SW of Knight Drive · Structure no. 27C0170
- Built
- 1965
- 60 years old
- Condition
- Good
- inspected July 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 26 ft
- 2 main spans
- Daily traffic
- 500
- 2021 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
W Castlewood Drive over San Rafael Bay Inlet is a concrete continuous culvert carrying W Castlewood Drive over San Rafael Bay Inlet in Marin 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 500 vehicles a day, roughly 1% of them trucks, projected to reach 700 by 2040. The structure is 26 ft (7.9 m) long and 44 ft wide.
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was W Castlewood Drive over San Rafael Bay Inlet built?
It was built in 1965, making it 60 years old in 2025.
What condition is W Castlewood Drive over San Rafael Bay Inlet in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.
How much traffic does W Castlewood Drive over San Rafael Bay Inlet carry?
About 500 vehicles per day (2021 count), of which roughly 1% are trucks.
How long is W Castlewood Drive over San Rafael Bay Inlet?
The structure is 26 ft (7.9 m) long with a longest span of 13 ft (3.9 m) and a deck 44 ft wide.
Who owns W Castlewood Drive over San Rafael Bay Inlet?
It is owned by the City or Municipal Highway Agency.