Interstate 580 WB over S580-N123 Connector Ramp
GoodAlameda County, California · 04-ALA-580-45.99-OAK · Structure no. 33 0281R
- Built
- 1961
- 64 years old
- Condition
- Good
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 129 ft
- 1 main span
- Daily traffic
- 99,000
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 580 WB over S580-N123 Connector Ramp is a concrete box beam or girders - multiple carrying Interstate 580 WB over S580-N123 Connector Ramp in Alameda County, California. It was built in 1961, so it is 64 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 99,000 vehicles a day, roughly 3% of them trucks, projected to reach 315,259 by 2042. The structure is 129 ft (39.3 m) long and 62 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 580 WB over S580-N123 Connector Ramp built?
It was built in 1961, making it 64 years old in 2025.
What condition is Interstate 580 WB over S580-N123 Connector Ramp in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.
How much traffic does Interstate 580 WB over S580-N123 Connector Ramp carry?
About 99,000 vehicles per day (2017 count), of which roughly 3% are trucks.
How long is Interstate 580 WB over S580-N123 Connector Ramp?
The structure is 129 ft (39.3 m) long with a longest span of 50 ft (15.2 m) and a deck 62 ft wide.
Who owns Interstate 580 WB over S580-N123 Connector Ramp?
It is owned by the State Highway Agency.