Beach RD (main St) over San Francisco Bay
PoorMarin County, California · Intersection Beach & Main · Structure no. 27C0175
- Built
- 1918
- 107 years old
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Concrete Continuous
- Length
- 67 ft
- 2 main spans
- Daily traffic
- 2,000
- 2024 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Beach RD (main St) over San Francisco Bay is a concrete continuous stringer/multi-beam or girder carrying Beach RD (main St) over San Francisco Bay in Marin County, California. It was built in 1918, so it is 107 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 2,000 vehicles a day, roughly 1% of them trucks, projected to reach 2,600 by 2044. The structure is 67 ft (20.5 m) long and 20 ft wide.
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Beach RD (main St) over San Francisco Bay built?
It was built in 1918, making it 107 years old in 2025.
What condition is Beach RD (main St) over San Francisco Bay 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 September 2024.
How much traffic does Beach RD (main St) over San Francisco Bay carry?
About 2,000 vehicles per day (2024 count), of which roughly 1% are trucks.
How long is Beach RD (main St) over San Francisco Bay?
The structure is 67 ft (20.5 m) long with a longest span of 32 ft (9.9 m) and a deck 20 ft wide.
Who owns Beach RD (main St) over San Francisco Bay?
It is owned by the City or Municipal Highway Agency.