State Route 4 WB over Willow Pass Road
GoodContra Costa County, California · 04-CC-004-R18.76 · Structure no. 28 0314L
- Built
- 1995
- 30 years old
- Condition
- Good
- inspected May 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 189 ft
- 2 main spans
- Daily traffic
- 63,500
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 WB over Willow Pass Road is a prestressed concrete continuous box beam or girders - multiple carrying State Route 4 WB over Willow Pass Road in Contra Costa County, California. It was built in 1995, so it is 30 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 63,500 vehicles a day, roughly 6% of them trucks, projected to reach 106,788 by 2045. The structure is 189 ft (57.5 m) long and 91 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 4 WB over Willow Pass Road built?
It was built in 1995, making it 30 years old in 2025.
What condition is State Route 4 WB over Willow Pass Road 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 May 2023.
How much traffic does State Route 4 WB over Willow Pass Road carry?
About 63,500 vehicles per day (2017 count), of which roughly 6% are trucks.
How long is State Route 4 WB over Willow Pass Road?
The structure is 189 ft (57.5 m) long with a longest span of 94 ft (28.5 m) and a deck 91 ft wide.
Who owns State Route 4 WB over Willow Pass Road?
It is owned by the State Highway Agency.