State Route 4 WB over Lone Tree Way
FairContra Costa County, California · 04-CC-004-R32.94-BTWD · Structure no. 28 0391L
- Built
- 2008
- 17 years old
- Condition
- Fair
- inspected June 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 249 ft
- 2 main spans
- Daily traffic
- 40,000
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 WB over Lone Tree Way is a prestressed concrete continuous box beam or girders - multiple carrying State Route 4 WB over Lone Tree Way in Contra Costa County, California. It was built in 2008, so it is 17 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 5 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 40,000 vehicles a day, roughly 10% of them trucks, projected to reach 63,492 by 2045. The structure is 249 ft (75.8 m) long and 67 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Lone Tree Way built?
It was built in 2008, making it 17 years old in 2025.
What condition is State Route 4 WB over Lone Tree Way 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 June 2023.
How much traffic does State Route 4 WB over Lone Tree Way carry?
About 40,000 vehicles per day (2017 count), of which roughly 10% are trucks.
How long is State Route 4 WB over Lone Tree Way?
The structure is 249 ft (75.8 m) long with a longest span of 122 ft (37.3 m) and a deck 67 ft wide.
Who owns State Route 4 WB over Lone Tree Way?
It is owned by the State Highway Agency.