Interstate 680 over State Route 84 SB & Off
PoorAlameda County, California · 04-ALA-680-R11.81 · Structure no. 33 0352
- Built
- 1967
- 58 years old, rebuilt 1990
- Condition
- Poor
- inspected April 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 331 ft
- 3 main spans
- Daily traffic
- 142,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 680 over State Route 84 SB & Off is a concrete continuous box beam or girders - multiple carrying Interstate 680 over State Route 84 SB & Off in Alameda County, California. It was built in 1967 and reconstructed in 1990, so it is 58 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 142,000 vehicles a day, roughly 8% of them trucks, projected to reach 217,848 by 2046. The structure is 331 ft (100.9 m) long and 120 ft wide. If it were closed, the detour would be 23 mi (37 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 680 over State Route 84 SB & Off built?
It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1990.
What condition is Interstate 680 over State Route 84 SB & Off 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 680 over State Route 84 SB & Off carry?
About 142,000 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is Interstate 680 over State Route 84 SB & Off?
The structure is 331 ft (100.9 m) long with a longest span of 145 ft (44.2 m) and a deck 120 ft wide.
Who owns Interstate 680 over State Route 84 SB & Off?
It is owned by the State Highway Agency.