US Highway 101 over Windsor Creek
FairSonoma County, California · 04-SON-101-29.50 · Structure no. 20 0185
- Built
- 1962
- 63 years old, rebuilt 1997
- Condition
- Fair
- inspected April 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 27 ft
- 1 main span
- Daily traffic
- 45,500
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 over Windsor Creek is a concrete continuous culvert carrying US Highway 101 over Windsor Creek in Sonoma County, California. It was built in 1962 and reconstructed in 1997, 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 fair condition with a lowest component rating of 6 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 45,500 vehicles a day, roughly 15% of them trucks, projected to reach 103,899 by 2045. The structure is 27 ft (8.1 m) long. If it were closed, the detour would be 9.9 mi (16 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 over Windsor Creek built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1997.
What condition is US Highway 101 over Windsor 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 April 2023.
How much traffic does US Highway 101 over Windsor Creek carry?
About 45,500 vehicles per day (2015 count), of which roughly 15% are trucks.
How long is US Highway 101 over Windsor Creek?
The structure is 27 ft (8.1 m) long with a longest span of 27 ft (8.1 m).
Who owns US Highway 101 over Windsor Creek?
It is owned by the State Highway Agency.