Guerneville Road over Piner Creek
GoodSonoma County, California · 1/2 MI E Fulton Road · Structure no. 20C0077
- Built
- 1921
- 104 years old, rebuilt 1987
- Condition
- Good
- inspected June 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 98 ft
- 2 main spans
- Daily traffic
- 10,000
- 2019 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Guerneville Road over Piner Creek is a concrete continuous tee beam carrying Guerneville Road over Piner Creek in Sonoma County, California. It was built in 1921 and reconstructed in 1987, so it is 104 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 10,000 vehicles a day, roughly 3% of them trucks, projected to reach 13,272 by 2044. The structure is 98 ft (29.9 m) long and 86 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Guerneville Road over Piner Creek built?
It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1987.
What condition is Guerneville Road over Piner 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 June 2024.
How much traffic does Guerneville Road over Piner Creek carry?
About 10,000 vehicles per day (2019 count), of which roughly 3% are trucks.
How long is Guerneville Road over Piner Creek?
The structure is 98 ft (29.9 m) long with a longest span of 49 ft (14.9 m) and a deck 86 ft wide.
Who owns Guerneville Road over Piner Creek?
It is owned by the City or Municipal Highway Agency.