River Road over Gill Creek
FairSonoma County, California · 2.0 MI NW of SR 128 · Structure no. 20C0406
- Built
- 1962
- 63 years old
- Condition
- Fair
- inspected July 2023
- Type
- Slab
- Concrete
- Length
- 43 ft
- 1 main span
- Daily traffic
- 367
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
River Road over Gill Creek is a concrete slab carrying River Road over Gill Creek in Sonoma County, California. It was built in 1962, so it is 63 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 367 vehicles a day, roughly 1% of them trucks, projected to reach 952 by 2043. The structure is 43 ft (13.1 m) long and 24 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 | 7 Good | Some minor problems. |
| 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was River Road over Gill Creek built?
It was built in 1962, making it 63 years old in 2025.
What condition is River Road over Gill 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 River Road over Gill Creek carry?
About 367 vehicles per day (2011 count), of which roughly 1% are trucks.
How long is River Road over Gill Creek?
The structure is 43 ft (13.1 m) long with a longest span of 40 ft (12.2 m) and a deck 24 ft wide.
Who owns River Road over Gill Creek?
It is owned by the County Highway Agency.