State Route 4 WB over Franklin Canyon RD
FairContra Costa County, California · 04-CC-004-R2.70L · Structure no. 28 0370L
- Built
- 2001
- 24 years old
- Condition
- Fair
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 110 ft
- 1 main span
- Daily traffic
- 40,500
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 WB over Franklin Canyon RD is a prestressed concrete box beam or girders - multiple carrying State Route 4 WB over Franklin Canyon RD in Contra Costa County, California. It was built in 2001, so it is 24 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 40,500 vehicles a day, roughly 8% of them trucks, projected to reach 81,169 by 2042. The structure is 110 ft (33.5 m) long and 42 ft wide.
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 WB over Franklin Canyon RD built?
It was built in 2001, making it 24 years old in 2025.
What condition is State Route 4 WB over Franklin Canyon RD in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.
How much traffic does State Route 4 WB over Franklin Canyon RD carry?
About 40,500 vehicles per day (2018 count), of which roughly 8% are trucks.
How long is State Route 4 WB over Franklin Canyon RD?
The structure is 110 ft (33.5 m) long with a longest span of 110 ft (33.5 m) and a deck 42 ft wide.
Who owns State Route 4 WB over Franklin Canyon RD?
It is owned by the State Highway Agency.