Interstate 580 over Hillside
FairAlameda County, California · 04-ALA-580-R6.92 · Structure no. 33 0406
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 1,443 ft
- 18 main spans
- Daily traffic
- 110,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 580 over Hillside is a prestressed concrete continuous stringer/multi-beam or girder carrying Interstate 580 over Hillside in Alameda County, California. It was built in 1969, so it is 56 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 110,000 vehicles a day, roughly 11% of them trucks, projected to reach 237,302 by 2042. The structure is 1,443 ft (439.8 m) long and 93 ft wide. If it were closed, the detour would be 3.1 mi (5 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 Interstate 580 over Hillside built?
It was built in 1969, making it 56 years old in 2025.
What condition is Interstate 580 over Hillside 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 January 2024.
How much traffic does Interstate 580 over Hillside carry?
About 110,000 vehicles per day (2020 count), of which roughly 11% are trucks.
How long is Interstate 580 over Hillside?
The structure is 1,443 ft (439.8 m) long with a longest span of 80 ft (24.4 m) and a deck 93 ft wide.
Who owns Interstate 580 over Hillside?
It is owned by the State Highway Agency.