Alemany Blvd NB over Route I 280
PoorSan Francisco County, California · 04-SF-280-R3.87-SF · Structure no. 34 0073
- Built
- 1963
- 62 years old
- Condition
- Poor
- inspected April 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 375 ft
- 4 main spans
- Daily traffic
- 10,055
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Alemany Blvd NB over Route I 280 is a concrete continuous box beam or girders - multiple carrying Alemany Blvd NB over Route I 280 in San Francisco County, California. It was built in 1963, so it is 62 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 10,055 vehicles a day, roughly 1% of them trucks, projected to reach 15,980 by 2044. The structure is 375 ft (114.3 m) long and 46 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 Alemany Blvd NB over Route I 280 built?
It was built in 1963, making it 62 years old in 2025.
What condition is Alemany Blvd NB over Route I 280 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 Alemany Blvd NB over Route I 280 carry?
About 10,055 vehicles per day (2019 count), of which roughly 1% are trucks.
How long is Alemany Blvd NB over Route I 280?
The structure is 375 ft (114.3 m) long with a longest span of 127 ft (38.7 m) and a deck 46 ft wide.
Who owns Alemany Blvd NB over Route I 280?
It is owned by the State Highway Agency.