Caulfield Lane over U.S. Highway 101
FairSonoma County, California · 04-SON-101-3.98-PET · Structure no. 20 0245
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 247 ft
- 2 main spans
- Daily traffic
- 2,500
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
Caulfield Lane over U.S. Highway 101 is a prestressed concrete continuous box beam or girders - multiple carrying Caulfield Lane over U.S. Highway 101 in Sonoma County, California. It was built in 1974, so it is 51 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 2,500 vehicles a day, roughly 5% of them trucks, projected to reach 4,509 by 2046. The structure is 247 ft (75.2 m) long and 62 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Caulfield Lane over U.S. Highway 101 built?
It was built in 1974, making it 51 years old in 2025.
What condition is Caulfield Lane 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 March 2024.
How much traffic does Caulfield Lane over U.S. Highway 101 carry?
About 2,500 vehicles per day (2015 count), of which roughly 5% are trucks.
How long is Caulfield Lane over U.S. Highway 101?
The structure is 247 ft (75.2 m) long with a longest span of 124 ft (37.9 m) and a deck 62 ft wide.
Who owns Caulfield Lane over U.S. Highway 101?
It is owned by the State Highway Agency.