Sir Francis Drake over Lagunitas Creek
PoorMarin County, California · 1.9 MI E SR 1 at Olema · Structure no. 27C0018
- Built
- 1964
- 61 years old
- Condition
- Poor
- inspected August 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 193 ft
- 3 main spans
- Daily traffic
- 25,582
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
Sir Francis Drake over Lagunitas Creek is a concrete continuous tee beam carrying Sir Francis Drake over Lagunitas Creek in Marin County, California. It was built in 1964, so it is 61 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 25,582 vehicles a day, roughly 10% of them trucks, projected to reach 10,031 by 2045. The structure is 193 ft (58.8 m) long and 44 ft wide. If it were closed, the detour would be 9.9 mi (16 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sir Francis Drake over Lagunitas Creek built?
It was built in 1964, making it 61 years old in 2025.
What condition is Sir Francis Drake over Lagunitas Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.
How much traffic does Sir Francis Drake over Lagunitas Creek carry?
About 25,582 vehicles per day (2018 count), of which roughly 10% are trucks.
How long is Sir Francis Drake over Lagunitas Creek?
The structure is 193 ft (58.8 m) long with a longest span of 76 ft (23.2 m) and a deck 44 ft wide.
Who owns Sir Francis Drake over Lagunitas Creek?
It is owned by the County Highway Agency.