Treat Boulevard over Interstate 680
FairContra Costa County, California · 04-CC-680-16.40 · Structure no. 28 0120
- Built
- 1982
- 43 years old
- Condition
- Fair
- inspected January 2025
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 262 ft
- 2 main spans
- Daily traffic
- 55,600
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
Treat Boulevard over Interstate 680 is a prestressed concrete continuous box beam or girders - multiple carrying Treat Boulevard over Interstate 680 in Contra Costa County, California. It was built in 1982, so it is 43 years old, younger 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 6 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 55,600 vehicles a day, roughly 3% of them trucks, projected to reach 76,764 by 2047. The structure is 262 ft (79.9 m) long and 113 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Treat Boulevard over Interstate 680 built?
It was built in 1982, making it 43 years old in 2025.
What condition is Treat Boulevard over Interstate 680 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 2025.
How much traffic does Treat Boulevard over Interstate 680 carry?
About 55,600 vehicles per day (2010 count), of which roughly 3% are trucks.
How long is Treat Boulevard over Interstate 680?
The structure is 262 ft (79.9 m) long with a longest span of 149 ft (45.4 m) and a deck 113 ft wide.
Who owns Treat Boulevard over Interstate 680?
It is owned by the State Highway Agency.