Imhoff Drive over Walnut Creek
GoodContra Costa County, California · 0.3 MI W Solano Way · Structure no. 28C0112
- Built
- 1981
- 44 years old
- Condition
- Good
- inspected November 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 464 ft
- 6 main spans
- Daily traffic
- 1,000
- 2013 count
- Owner
- County
- County Highway Agency
About this bridge
Imhoff Drive over Walnut Creek is a concrete continuous box beam or girders - multiple carrying Imhoff Drive over Walnut Creek in Contra Costa County, California. It was built in 1981, 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 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 1,000 vehicles a day, roughly 20% of them trucks, projected to reach 3,218 by 2046. The structure is 464 ft (141.4 m) long and 53 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 8 Very Good | No problems noted. |
| 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 Imhoff Drive over Walnut Creek built?
It was built in 1981, making it 44 years old in 2025.
What condition is Imhoff Drive over Walnut Creek 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 November 2024.
How much traffic does Imhoff Drive over Walnut Creek carry?
About 1,000 vehicles per day (2013 count), of which roughly 20% are trucks.
How long is Imhoff Drive over Walnut Creek?
The structure is 464 ft (141.4 m) long with a longest span of 84 ft (25.6 m) and a deck 53 ft wide.
Who owns Imhoff Drive over Walnut Creek?
It is owned by the County Highway Agency.