U.S. Highway 101 over Laguna De Santa Rosa
GoodSonoma County, California · 04-SON-101-13.09-RNPK · Structure no. 20 0016
- Built
- 1956
- 69 years old, rebuilt 2011
- Condition
- Good
- inspected April 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 22 ft
- 2 main spans
- Daily traffic
- 92,000
- 2014 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Laguna De Santa Rosa is a concrete continuous culvert carrying U.S. Highway 101 over Laguna De Santa Rosa in Sonoma County, California. It was built in 1956 and reconstructed in 2011, 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 92,000 vehicles a day, roughly 6% of them trucks, projected to reach 170,145 by 2046. The structure is 22 ft (6.7 m) long and 139 ft wide. If it were closed, the detour would be 1.2 mi (2 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was U.S. Highway 101 over Laguna De Santa Rosa built?
It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2011.
What condition is U.S. Highway 101 over Laguna De Santa Rosa 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 April 2024.
How much traffic does U.S. Highway 101 over Laguna De Santa Rosa carry?
About 92,000 vehicles per day (2014 count), of which roughly 6% are trucks.
How long is U.S. Highway 101 over Laguna De Santa Rosa?
The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 139 ft wide.
Who owns U.S. Highway 101 over Laguna De Santa Rosa?
It is owned by the State Highway Agency.