State Route 4 WB over Contra Costa Canal
GoodContra Costa County, California · 04-CC-004-R31.28-ANT · Structure no. 28 0389L
- Built
- 2008
- 17 years old
- Condition
- Good
- inspected June 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 488 ft
- 3 main spans
- Daily traffic
- 20,000
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 WB over Contra Costa Canal is a prestressed concrete continuous box beam or girders - multiple carrying State Route 4 WB over Contra Costa Canal in Contra Costa County, California. It was built in 2008, so it is 17 years old, younger 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 20,000 vehicles a day, roughly 8% of them trucks, projected to reach 35,706 by 2045. The structure is 488 ft (148.8 m) long and 68 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 4 WB over Contra Costa Canal built?
It was built in 2008, making it 17 years old in 2025.
What condition is State Route 4 WB over Contra Costa Canal 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 June 2023.
How much traffic does State Route 4 WB over Contra Costa Canal carry?
About 20,000 vehicles per day (2017 count), of which roughly 8% are trucks.
How long is State Route 4 WB over Contra Costa Canal?
The structure is 488 ft (148.8 m) long with a longest span of 171 ft (52 m) and a deck 68 ft wide.
Who owns State Route 4 WB over Contra Costa Canal?
It is owned by the State Highway Agency.