Sir-Francis Drake over San Anselmo Creek
FairMarin County, California · 3.5 MI W SR 101 Sn Anslm · Structure no. 27C0040
- Built
- 1929
- 96 years old, rebuilt 2011
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Concrete
- Length
- 44 ft
- 1 main span
- Daily traffic
- 34,000
- 2011 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Sir-Francis Drake over San Anselmo Creek is a concrete tee beam carrying Sir-Francis Drake over San Anselmo Creek in Marin County, California. It was built in 1929 and reconstructed in 2011, so it is 96 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 34,000 vehicles a day, roughly 5% of them trucks, projected to reach 38,507 by 2046. The structure is 44 ft (13.4 m) long and 93 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sir-Francis Drake over San Anselmo Creek built?
It was built in 1929, making it 96 years old in 2025. It was reconstructed in 2011.
What condition is Sir-Francis Drake over San Anselmo 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 September 2024.
How much traffic does Sir-Francis Drake over San Anselmo Creek carry?
About 34,000 vehicles per day (2011 count), of which roughly 5% are trucks.
How long is Sir-Francis Drake over San Anselmo Creek?
The structure is 44 ft (13.4 m) long with a longest span of 43 ft (13.1 m) and a deck 93 ft wide.
Who owns Sir-Francis Drake over San Anselmo Creek?
It is owned by the City or Municipal Highway Agency.