Bicentennial Way over U.S. Highway 101
FairSonoma County, California · 04-SON-101-22.52-SRO · Structure no. 20 0257
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 377 ft
- 3 main spans
- Daily traffic
- 10,500
- 2014 count
- Owner
- State
- State Highway Agency
About this bridge
Bicentennial Way over U.S. Highway 101 is a prestressed concrete continuous box beam or girders - multiple carrying Bicentennial Way over U.S. Highway 101 in Sonoma County, California. It was built in 1979, so it is 46 years old, younger 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 10,500 vehicles a day, roughly 5% of them trucks, projected to reach 12,614 by 2044. The structure is 377 ft (115 m) long and 82 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Bicentennial Way over U.S. Highway 101 built?
It was built in 1979, making it 46 years old in 2025.
What condition is Bicentennial Way over U.S. Highway 101 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 August 2024.
How much traffic does Bicentennial Way over U.S. Highway 101 carry?
About 10,500 vehicles per day (2014 count), of which roughly 5% are trucks.
How long is Bicentennial Way over U.S. Highway 101?
The structure is 377 ft (115 m) long with a longest span of 144 ft (43.9 m) and a deck 82 ft wide.
Who owns Bicentennial Way over U.S. Highway 101?
It is owned by the State Highway Agency.