Riverside Drive over Sonoma Creek
FairSonoma County, California · 0.1 MI W/O HWY 12 · Structure no. 20C0542
- Built
- 2006
- 19 years old
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 166 ft
- 1 main span
- Daily traffic
- 9,000
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Riverside Drive over Sonoma Creek is a steel stringer/multi-beam or girder carrying Riverside Drive over Sonoma Creek in Sonoma County, California. It was built in 2006, so it is 19 years old, younger 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 9,000 vehicles a day, roughly 15% of them trucks, projected to reach 12,573 by 2046. The structure is 166 ft (50.5 m) long and 59 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Riverside Drive over Sonoma Creek built?
It was built in 2006, making it 19 years old in 2025.
What condition is Riverside Drive over Sonoma 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 June 2024.
How much traffic does Riverside Drive over Sonoma Creek carry?
About 9,000 vehicles per day (2015 count), of which roughly 15% are trucks.
How long is Riverside Drive over Sonoma Creek?
The structure is 166 ft (50.5 m) long with a longest span of 160 ft (48.8 m) and a deck 59 ft wide.
Who owns Riverside Drive over Sonoma Creek?
It is owned by the County Highway Agency.