Interstate 680 over South Mococo Drain
GoodContra Costa County, California · 04-CC-680-23.99 · Structure no. 28 0220
- Built
- 1962
- 63 years old
- Condition
- Good
- inspected January 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 22 ft
- 2 main spans
- Daily traffic
- 105,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 680 over South Mococo Drain is a concrete continuous culvert carrying Interstate 680 over South Mococo Drain in Contra Costa County, California. It was built in 1962, so it is 63 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 105,000 vehicles a day, projected to reach 163,774 by 2045. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 8.1 mi (13 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 680 over South Mococo Drain built?
It was built in 1962, making it 63 years old in 2025.
What condition is Interstate 680 over South Mococo Drain in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.
How much traffic does Interstate 680 over South Mococo Drain carry?
About 105,000 vehicles per day (2009 count).
How long is Interstate 680 over South Mococo Drain?
The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).
Who owns Interstate 680 over South Mococo Drain?
It is owned by the State Highway Agency.