Franz Valley Road over Franz Creek
FairSonoma County, California · 2 Miles SW of SR 128 · Structure no. 20C0327
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 80 ft
- 2 main spans
- Daily traffic
- 500
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Franz Valley Road over Franz Creek is a steel continuous stringer/multi-beam or girder carrying Franz Valley Road over Franz Creek in Sonoma County, California. It was built in 1977, so it is 48 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 500 vehicles a day, roughly 2% of them trucks, projected to reach 230 by 2040. The structure is 80 ft (24.4 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Franz Valley Road over Franz Creek built?
It was built in 1977, making it 48 years old in 2025.
What condition is Franz Valley Road over Franz 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 July 2023.
How much traffic does Franz Valley Road over Franz Creek carry?
About 500 vehicles per day (2015 count), of which roughly 2% are trucks.
How long is Franz Valley Road over Franz Creek?
The structure is 80 ft (24.4 m) long with a longest span of 40 ft (12.2 m) and a deck 33 ft wide.
Who owns Franz Valley Road over Franz Creek?
It is owned by the County Highway Agency.