Duncan Street over Walnut Creek
GoodContra Costa County, California · At N. Broadway Street · Structure no. 28C0514
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected January 2025
- Type
- Slab
- Concrete Continuous
- Length
- 76 ft
- 3 main spans
- Daily traffic
- 5,000
- 2019 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Duncan Street over Walnut Creek is a concrete continuous slab carrying Duncan Street over Walnut Creek in Contra Costa County, California. It was built in 1971, so it is 54 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 5,000 vehicles a day, projected to reach 7,677 by 2047. The structure is 76 ft (23.1 m) long. 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 Duncan Street over Walnut Creek built?
It was built in 1971, making it 54 years old in 2025.
What condition is Duncan Street 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 January 2025.
How much traffic does Duncan Street over Walnut Creek carry?
About 5,000 vehicles per day (2019 count).
How long is Duncan Street over Walnut Creek?
The structure is 76 ft (23.1 m) long with a longest span of 25 ft (7.6 m).
Who owns Duncan Street over Walnut Creek?
It is owned by the City or Municipal Highway Agency.