Willow Ave over State Route 4
GoodContra Costa County, California · 04-CC-004-R0.71-HER · Structure no. 28 0348
- Built
- 1997
- 28 years old
- Condition
- Good
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 233 ft
- 2 main spans
- Daily traffic
- 1,800
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
Willow Ave over State Route 4 is a prestressed concrete continuous box beam or girders - multiple carrying Willow Ave over State Route 4 in Contra Costa County, California. It was built in 1997, so it is 28 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 1,800 vehicles a day, roughly 7% of them trucks, projected to reach 2,649 by 2042. The structure is 233 ft (71 m) long and 68 ft wide. If it were closed, the detour would be 2.5 mi (4 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 Willow Ave over State Route 4 built?
It was built in 1997, making it 28 years old in 2025.
What condition is Willow Ave over State Route 4 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 2024.
How much traffic does Willow Ave over State Route 4 carry?
About 1,800 vehicles per day (2018 count), of which roughly 7% are trucks.
How long is Willow Ave over State Route 4?
The structure is 233 ft (71 m) long with a longest span of 123 ft (37.4 m) and a deck 68 ft wide.
Who owns Willow Ave over State Route 4?
It is owned by the State Highway Agency.