US Highway 101 over Washington Street Creek
FairSonoma County, California · 04-SON-101-4.77-PET · Structure no. 20 0163
- Built
- 1955
- 70 years old
- Condition
- Fair
- inspected March 2024
- Type
- Slab
- Concrete Continuous
- Length
- 67 ft
- 3 main spans
- Daily traffic
- 43,000
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 over Washington Street Creek is a concrete continuous slab carrying US Highway 101 over Washington Street Creek in Sonoma County, California. It was built in 1955, so it is 70 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 43,000 vehicles a day, roughly 8% of them trucks, projected to reach 68,443 by 2046. The structure is 67 ft (20.4 m) long and 143 ft wide. If it were closed, the detour would be 1.2 mi (2 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 |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 over Washington Street Creek built?
It was built in 1955, making it 70 years old in 2025.
What condition is US Highway 101 over Washington Street 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 March 2024.
How much traffic does US Highway 101 over Washington Street Creek carry?
About 43,000 vehicles per day (2016 count), of which roughly 8% are trucks.
How long is US Highway 101 over Washington Street Creek?
The structure is 67 ft (20.4 m) long with a longest span of 26 ft (7.9 m) and a deck 143 ft wide.
Who owns US Highway 101 over Washington Street Creek?
It is owned by the State Highway Agency.