State Route 12 over Santa Rosa Creek
GoodSonoma County, California · 04-SON-012-T18.51-SRO · Structure no. 20 0238
- Built
- 1956
- 69 years old, rebuilt 1965
- Condition
- Good
- inspected September 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 131 ft
- 3 main spans
- Daily traffic
- 40,750
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 12 over Santa Rosa Creek is a concrete continuous tee beam carrying State Route 12 over Santa Rosa Creek in Sonoma County, California. It was built in 1956 and reconstructed in 1965, so it is 69 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 40,750 vehicles a day, roughly 2% of them trucks, projected to reach 59,162 by 2046. The structure is 131 ft (39.9 m) long and 80 ft wide. If it were closed, the detour would be 21.1 mi (34 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 12 over Santa Rosa Creek built?
It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1965.
What condition is State Route 12 over Santa Rosa 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 September 2024.
How much traffic does State Route 12 over Santa Rosa Creek carry?
About 40,750 vehicles per day (2016 count), of which roughly 2% are trucks.
How long is State Route 12 over Santa Rosa Creek?
The structure is 131 ft (39.9 m) long with a longest span of 42 ft (12.8 m) and a deck 80 ft wide.
Who owns State Route 12 over Santa Rosa Creek?
It is owned by the State Highway Agency.