Interstate 280 over Alemany Blvd
PoorSan Francisco County, California · 04-SF-280-R0.46-SF · Structure no. 34 0026
- Built
- 1966
- 59 years old, rebuilt 1972
- Condition
- Poor
- inspected April 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 371 ft
- 4 main spans
- Daily traffic
- 132,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 280 over Alemany Blvd is a concrete continuous box beam or girders - multiple carrying Interstate 280 over Alemany Blvd in San Francisco County, California. It was built in 1966 and reconstructed in 1972, so it is 59 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 132,000 vehicles a day, roughly 2% of them trucks, projected to reach 171,959 by 2044. The structure is 371 ft (113.1 m) long and 137 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 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 280 over Alemany Blvd built?
It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1972.
What condition is Interstate 280 over Alemany Blvd 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 April 2024.
How much traffic does Interstate 280 over Alemany Blvd carry?
About 132,000 vehicles per day (2019 count), of which roughly 2% are trucks.
How long is Interstate 280 over Alemany Blvd?
The structure is 371 ft (113.1 m) long with a longest span of 109 ft (33.2 m) and a deck 137 ft wide.
Who owns Interstate 280 over Alemany Blvd?
It is owned by the State Highway Agency.