State Route 4 over Balfour Road
GoodContra Costa County, California · 04-CC-004-R35.57-BTWD · Structure no. 28 0411R
- Built
- 2018
- 7 years old
- Condition
- Good
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 198 ft
- 2 main spans
- Daily traffic
- 45,500
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 over Balfour Road is a prestressed concrete stringer/multi-beam or girder carrying State Route 4 over Balfour Road in Contra Costa County, California. It was built in 2018, so it is 7 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 45,500 vehicles a day, roughly 10% of them trucks, projected to reach 61,210 by 2045. The structure is 198 ft (60.2 m) long and 92 ft wide. If it were closed, the detour would be 6.2 mi (10 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 over Balfour Road built?
It was built in 2018, making it 7 years old in 2025.
What condition is State Route 4 over Balfour 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 2023.
How much traffic does State Route 4 over Balfour Road carry?
About 45,500 vehicles per day (2019 count), of which roughly 10% are trucks.
How long is State Route 4 over Balfour Road?
The structure is 198 ft (60.2 m) long with a longest span of 99 ft (30.3 m) and a deck 92 ft wide.
Who owns State Route 4 over Balfour Road?
It is owned by the State Highway Agency.