Concord Avenue over Marsh Creek
GoodContra Costa County, California · 1.0 MI W Walnut Ave · Structure no. 28C0398
- Built
- 1959
- 66 years old
- Condition
- Good
- inspected July 2024
- Type
- Culvert
- Concrete
- Length
- 22 ft
- 1 main span
- Daily traffic
- 3,979
- 2013 count
- Owner
- County
- County Highway Agency
About this bridge
Concord Avenue over Marsh Creek is a concrete culvert carrying Concord Avenue over Marsh Creek in Contra Costa County, California. It was built in 1959, so it is 66 years old, older 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 3,979 vehicles a day, roughly 8% of them trucks, projected to reach 8,353 by 2046. The structure is 22 ft (6.6 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Concord Avenue over Marsh Creek built?
It was built in 1959, making it 66 years old in 2025.
What condition is Concord Avenue over Marsh 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 July 2024.
How much traffic does Concord Avenue over Marsh Creek carry?
About 3,979 vehicles per day (2013 count), of which roughly 8% are trucks.
How long is Concord Avenue over Marsh Creek?
The structure is 22 ft (6.6 m) long with a longest span of 22 ft (6.6 m) and a deck 31 ft wide.
Who owns Concord Avenue over Marsh Creek?
It is owned by the County Highway Agency.