US Highway 101 SB over ST RTE 128 (canyon Rd)
GoodSonoma County, California · 04-SON-101-R43.36 · Structure no. 20 0244L
- Built
- 1975
- 50 years old
- Condition
- Good
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 150 ft
- 1 main span
- Daily traffic
- 13,500
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 SB over ST RTE 128 (canyon Rd) is a prestressed concrete box beam or girders - multiple carrying US Highway 101 SB over ST RTE 128 (canyon Rd) in Sonoma County, California. It was built in 1975, so it is 50 years old, younger 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 13,500 vehicles a day, roughly 11% of them trucks, projected to reach 24,731 by 2045. The structure is 150 ft (45.7 m) long and 41 ft wide.
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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 SB over ST RTE 128 (canyon Rd) built?
It was built in 1975, making it 50 years old in 2025.
What condition is US Highway 101 SB over ST RTE 128 (canyon Rd) 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 2023.
How much traffic does US Highway 101 SB over ST RTE 128 (canyon Rd) carry?
About 13,500 vehicles per day (2015 count), of which roughly 11% are trucks.
How long is US Highway 101 SB over ST RTE 128 (canyon Rd)?
The structure is 150 ft (45.7 m) long with a longest span of 148 ft (45.1 m) and a deck 41 ft wide.
Who owns US Highway 101 SB over ST RTE 128 (canyon Rd)?
It is owned by the State Highway Agency.