State Route 4 WB over Walnut Creek
FairContra Costa County, California · 04-CC-004-R13.40 · Structure no. 28 0240L
- Built
- 1981
- 44 years old, rebuilt 2021
- Condition
- Fair
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 428 ft
- 5 main spans
- Daily traffic
- 41,300
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 WB over Walnut Creek is a concrete continuous box beam or girders - multiple carrying State Route 4 WB over Walnut Creek in Contra Costa County, California. It was built in 1981 and reconstructed in 2021, so it is 44 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 41,300 vehicles a day, roughly 7% of them trucks, projected to reach 53,700 by 2042. The structure is 428 ft (130.5 m) long and 71 ft wide. If it were closed, the detour would be 1.2 mi (2 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. |
| 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 Walnut Creek built?
It was built in 1981, making it 44 years old in 2025. It was reconstructed in 2021.
What condition is State Route 4 WB over Walnut Creek 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 June 2024.
How much traffic does State Route 4 WB over Walnut Creek carry?
About 41,300 vehicles per day (2019 count), of which roughly 7% are trucks.
How long is State Route 4 WB over Walnut Creek?
The structure is 428 ft (130.5 m) long with a longest span of 90 ft (27.4 m) and a deck 71 ft wide.
Who owns State Route 4 WB over Walnut Creek?
It is owned by the State Highway Agency.