Cazadero HWY over Austin Creek
FairSonoma County, California · Just S of Scanlon RD · Structure no. 20C0427
- Built
- 1956
- 69 years old
- Condition
- Fair
- inspected June 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 198 ft
- 4 main spans
- Daily traffic
- 1,550
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Cazadero HWY over Austin Creek is a concrete continuous tee beam carrying Cazadero HWY over Austin Creek in Sonoma County, California. It was built in 1956, so it is 69 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 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 1,550 vehicles a day, roughly 4% of them trucks, projected to reach 747 by 2046. The structure is 198 ft (60.5 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Cazadero HWY over Austin Creek built?
It was built in 1956, making it 69 years old in 2025.
What condition is Cazadero HWY over Austin 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 June 2024.
How much traffic does Cazadero HWY over Austin Creek carry?
About 1,550 vehicles per day (2015 count), of which roughly 4% are trucks.
How long is Cazadero HWY over Austin Creek?
The structure is 198 ft (60.5 m) long with a longest span of 65 ft (19.8 m) and a deck 33 ft wide.
Who owns Cazadero HWY over Austin Creek?
It is owned by the County Highway Agency.