State Route 24 over Happy Valley Road
FairContra Costa County, California · 04-CC-024-R5.97-LFYT · Structure no. 28 0132R
- Built
- 1957
- 68 years old, rebuilt 1971
- Condition
- Fair
- inspected June 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 165 ft
- 3 main spans
- Daily traffic
- 79,500
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 24 over Happy Valley Road is a concrete continuous tee beam carrying State Route 24 over Happy Valley Road in Contra Costa County, California. It was built in 1957 and reconstructed in 1971, so it is 68 years old, older 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 79,500 vehicles a day, roughly 3% of them trucks, projected to reach 117,394 by 2041. The structure is 165 ft (50.3 m) long and 68 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 24 over Happy Valley Road built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1971.
What condition is State Route 24 over Happy Valley Road 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 24 over Happy Valley Road carry?
About 79,500 vehicles per day (2019 count), of which roughly 3% are trucks.
How long is State Route 24 over Happy Valley Road?
The structure is 165 ft (50.3 m) long with a longest span of 64 ft (19.5 m) and a deck 68 ft wide.
Who owns State Route 24 over Happy Valley Road?
It is owned by the State Highway Agency.