North Main Street over Interstate 680
PoorContra Costa County, California · 04-CC-680-15.61-WLC · Structure no. 28 0119
- Built
- 1996
- 29 years old
- Condition
- Poor
- inspected January 2025
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 624 ft
- 4 main spans
- Daily traffic
- 36,800
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
North Main Street over Interstate 680 is a prestressed concrete continuous box beam or girders - multiple carrying North Main Street over Interstate 680 in Contra Costa County, California. It was built in 1996, so it is 29 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 36,800 vehicles a day, roughly 4% of them trucks, projected to reach 44,494 by 2047. The structure is 624 ft (190.2 m) long and 93 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was North Main Street over Interstate 680 built?
It was built in 1996, making it 29 years old in 2025.
What condition is North Main Street over Interstate 680 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 North Main Street over Interstate 680 carry?
About 36,800 vehicles per day (2010 count), of which roughly 4% are trucks.
How long is North Main Street over Interstate 680?
The structure is 624 ft (190.2 m) long with a longest span of 213 ft (64.9 m) and a deck 93 ft wide.
Who owns North Main Street over Interstate 680?
It is owned by the State Highway Agency.