State Route 24 over Brown Avenue
PoorContra Costa County, California · 04-CC-024-R6.84-LFYT · Structure no. 28 0131R
- Built
- 1957
- 68 years old, rebuilt 1971
- Condition
- Poor
- inspected June 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 140 ft
- 3 main spans
- Daily traffic
- 79,500
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 24 over Brown Avenue is a concrete continuous tee beam carrying State Route 24 over Brown Avenue 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 79,500 vehicles a day, roughly 3% of them trucks, projected to reach 117,394 by 2041. The structure is 140 ft (42.7 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, 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 24 over Brown Avenue 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 Brown Avenue in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.
How much traffic does State Route 24 over Brown Avenue carry?
About 79,500 vehicles per day (2019 count), of which roughly 3% are trucks.
How long is State Route 24 over Brown Avenue?
The structure is 140 ft (42.7 m) long with a longest span of 54 ft (16.5 m) and a deck 80 ft wide.
Who owns State Route 24 over Brown Avenue?
It is owned by the State Highway Agency.