State Route 4 over Marsh Creek
GoodContra Costa County, California · 04-CC-004-R37.70-BTWD · Structure no. 28 0393
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected June 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 158 ft
- 1 main span
- Daily traffic
- 15,400
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 over Marsh Creek is a prestressed concrete box beam or girders - multiple carrying State Route 4 over Marsh Creek in Contra Costa County, California. It was built in 2009, so it is 16 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 15,400 vehicles a day, roughly 10% of them trucks, projected to reach 51,927 by 2045. The structure is 158 ft (48.3 m) long and 63 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 4 over Marsh Creek built?
It was built in 2009, making it 16 years old in 2025.
What condition is State Route 4 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 June 2023.
How much traffic does State Route 4 over Marsh Creek carry?
About 15,400 vehicles per day (2017 count), of which roughly 10% are trucks.
How long is State Route 4 over Marsh Creek?
The structure is 158 ft (48.3 m) long with a longest span of 154 ft (46.8 m) and a deck 63 ft wide.
Who owns State Route 4 over Marsh Creek?
It is owned by the State Highway Agency.