State Route 4 EB over Peralta Road
GoodContra Costa County, California · 04-CC-004-R13.96-CND · Structure no. 28 0242R
- Built
- 1978
- 47 years old, rebuilt 2021
- Condition
- Good
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 186 ft
- 1 main span
- Daily traffic
- 42,800
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 EB over Peralta Road is a prestressed concrete box beam or girders - multiple carrying State Route 4 EB over Peralta Road in Contra Costa County, California. It was built in 1978 and reconstructed in 2021, so it is 47 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 42,800 vehicles a day, roughly 7% of them trucks, projected to reach 55,650 by 2042. The structure is 186 ft (56.7 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 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 State Route 4 EB over Peralta Road built?
It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2021.
What condition is State Route 4 EB over Peralta Road 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 2024.
How much traffic does State Route 4 EB over Peralta Road carry?
About 42,800 vehicles per day (2019 count), of which roughly 7% are trucks.
How long is State Route 4 EB over Peralta Road?
The structure is 186 ft (56.7 m) long with a longest span of 182 ft (55.4 m) and a deck 65 ft wide.
Who owns State Route 4 EB over Peralta Road?
It is owned by the State Highway Agency.