Diablo Road over San Ramon Creek
FairContra Costa County, California · 0.2 MI West of I-680 · Structure no. 28C0200
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 112 ft
- 3 main spans
- Daily traffic
- 21,350
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Diablo Road over San Ramon Creek is a steel continuous stringer/multi-beam or girder carrying Diablo Road over San Ramon Creek in Contra Costa County, California. It was built in 1966, so it is 59 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 21,350 vehicles a day, roughly 15% of them trucks, projected to reach 21,735 by 2040. The structure is 112 ft (34 m) long and 76 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Diablo Road over San Ramon Creek built?
It was built in 1966, making it 59 years old in 2025.
What condition is Diablo Road over San Ramon Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2023.
How much traffic does Diablo Road over San Ramon Creek carry?
About 21,350 vehicles per day (2020 count), of which roughly 15% are trucks.
How long is Diablo Road over San Ramon Creek?
The structure is 112 ft (34 m) long with a longest span of 64 ft (19.5 m) and a deck 76 ft wide.
Who owns Diablo Road over San Ramon Creek?
It is owned by the City or Municipal Highway Agency.