Main Street over Contra Costa Canal
PoorContra Costa County, California · .01 MI Se/O Oakley RD · Structure no. 28C0270
- Built
- 1977
- 48 years old
- Condition
- Poor
- inspected January 2025
- Type
- Slab
- Concrete
- Length
- 38 ft
- 1 main span
- Daily traffic
- 28,500
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Main Street over Contra Costa Canal is a concrete slab carrying Main Street over Contra Costa Canal in Contra Costa County, California. It was built in 1977, so it is 48 years old, younger 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 28,500 vehicles a day, roughly 10% of them trucks, projected to reach 57,654 by 2047. The structure is 38 ft (11.6 m) long and 52 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Main Street over Contra Costa Canal built?
It was built in 1977, making it 48 years old in 2025.
What condition is Main Street over Contra Costa Canal 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 January 2025.
How much traffic does Main Street over Contra Costa Canal carry?
About 28,500 vehicles per day (2020 count), of which roughly 10% are trucks.
How long is Main Street over Contra Costa Canal?
The structure is 38 ft (11.6 m) long with a longest span of 36 ft (11 m) and a deck 52 ft wide.
Who owns Main Street over Contra Costa Canal?
It is owned by the City or Municipal Highway Agency.