Petaluma Hill RD over Lichau Creek
GoodSonoma County, California · 0.1 MI N JCT Old Rdw HWY · Structure no. 20C0129
- Built
- 1920
- 105 years old, rebuilt 1976
- Condition
- Good
- inspected April 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 49 ft
- 3 main spans
- Daily traffic
- 10,600
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Petaluma Hill RD over Lichau Creek is a concrete continuous tee beam carrying Petaluma Hill RD over Lichau Creek in Sonoma County, California. It was built in 1920 and reconstructed in 1976, so it is 105 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 10,600 vehicles a day, roughly 3% of them trucks, projected to reach 5,433 by 2046. The structure is 49 ft (14.9 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 Petaluma Hill RD over Lichau Creek built?
It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1976.
What condition is Petaluma Hill RD over Lichau Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.
How much traffic does Petaluma Hill RD over Lichau Creek carry?
About 10,600 vehicles per day (2015 count), of which roughly 3% are trucks.
How long is Petaluma Hill RD over Lichau Creek?
The structure is 49 ft (14.9 m) long with a longest span of 16 ft (4.9 m) and a deck 41 ft wide.
Who owns Petaluma Hill RD over Lichau Creek?
It is owned by the County Highway Agency.