N680-DIABLO RD Off over San Ramon Creek
GoodContra Costa County, California · 04-CC-680-R7.35-DNVL · Structure no. 28 0197S
- Built
- 1975
- 50 years old
- Condition
- Good
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 558 ft
- 7 main spans
- Daily traffic
- 4,650
- 1998 count
- Owner
- State
- State Highway Agency
About this bridge
N680-DIABLO RD Off over San Ramon Creek is a concrete continuous box beam or girders - multiple carrying N680-DIABLO RD Off over San Ramon Creek in Contra Costa County, California. It was built in 1975, so it is 50 years old, younger 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 4,650 vehicles a day, roughly 6% of them trucks, projected to reach 6,256 by 2046. The structure is 558 ft (170.1 m) long and 26 ft wide.
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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was N680-DIABLO RD Off over San Ramon Creek built?
It was built in 1975, making it 50 years old in 2025.
What condition is N680-DIABLO RD Off over San Ramon Creek 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 July 2024.
How much traffic does N680-DIABLO RD Off over San Ramon Creek carry?
About 4,650 vehicles per day (1998 count), of which roughly 6% are trucks.
How long is N680-DIABLO RD Off over San Ramon Creek?
The structure is 558 ft (170.1 m) long with a longest span of 100 ft (30.5 m) and a deck 26 ft wide.
Who owns N680-DIABLO RD Off over San Ramon Creek?
It is owned by the State Highway Agency.