Monterey Bl WB on over Bosworth & SB280 Onramp
FairSan Francisco County, California · 04-SF-280-R2.87-SF · Structure no. 34 0091
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected April 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 527 ft
- 6 main spans
- Daily traffic
- 8,133
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Monterey Bl WB on over Bosworth & SB280 Onramp is a concrete continuous box beam or girders - multiple carrying Monterey Bl WB on over Bosworth & SB280 Onramp in San Francisco 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 fair condition with a lowest component rating of 5 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 8,133 vehicles a day, roughly 1% of them trucks, projected to reach 6,179 by 2044. The structure is 527 ft (160.6 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Monterey Bl WB on over Bosworth & SB280 Onramp built?
It was built in 1964, making it 61 years old in 2025.
What condition is Monterey Bl WB on over Bosworth & SB280 Onramp 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 April 2024.
How much traffic does Monterey Bl WB on over Bosworth & SB280 Onramp carry?
About 8,133 vehicles per day (2019 count), of which roughly 1% are trucks.
How long is Monterey Bl WB on over Bosworth & SB280 Onramp?
The structure is 527 ft (160.6 m) long with a longest span of 123 ft (37.5 m) and a deck 25 ft wide.
Who owns Monterey Bl WB on over Bosworth & SB280 Onramp?
It is owned by the State Highway Agency.