US Highway 101 NB over Windsor Lane
FairSonoma County, California · 04-SON-101-29.35 · Structure no. 20 0184R
- Built
- 1962
- 63 years old
- Condition
- Fair
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 304 ft
- 4 main spans
- Daily traffic
- 22,750
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over Windsor Lane is a concrete continuous box beam or girders - multiple carrying US Highway 101 NB over Windsor Lane in Sonoma County, California. It was built in 1962, 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 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 22,750 vehicles a day, roughly 15% of them trucks, projected to reach 51,777 by 2045. The structure is 304 ft (92.7 m) long and 40 ft wide.
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 NB over Windsor Lane built?
It was built in 1962, making it 63 years old in 2025.
What condition is US Highway 101 NB over Windsor Lane 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 NB over Windsor Lane carry?
About 22,750 vehicles per day (2015 count), of which roughly 15% are trucks.
How long is US Highway 101 NB over Windsor Lane?
The structure is 304 ft (92.7 m) long with a longest span of 84 ft (25.6 m) and a deck 40 ft wide.
Who owns US Highway 101 NB over Windsor Lane?
It is owned by the State Highway Agency.