US Highway 101 over College Avenue
FairSonoma County, California · 04-SON-101-20.74-SRO · Structure no. 20 0277
- Built
- 2009
- 16 years old
- Condition
- Fair
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 193 ft
- 2 main spans
- Daily traffic
- 136,500
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 over College Avenue is a prestressed concrete continuous box beam or girders - multiple carrying US Highway 101 over College Avenue in Sonoma County, California. It was built in 2009, so it is 16 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 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 136,500 vehicles a day, roughly 6% of them trucks, projected to reach 168,873 by 2046. The structure is 193 ft (58.8 m) long and 115 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 over College Avenue built?
It was built in 2009, making it 16 years old in 2025.
What condition is US Highway 101 over College Avenue 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 US Highway 101 over College Avenue carry?
About 136,500 vehicles per day (2016 count), of which roughly 6% are trucks.
How long is US Highway 101 over College Avenue?
The structure is 193 ft (58.8 m) long with a longest span of 96 ft (29.4 m) and a deck 115 ft wide.
Who owns US Highway 101 over College Avenue?
It is owned by the State Highway Agency.