Silverado Trail over Bell Canyon Creek
GoodNapa County, California · At Glass Mtn RD · Structure no. 21C0001
- Built
- 1936
- 89 years old, rebuilt 1976
- Condition
- Good
- inspected May 2023
- Type
- Slab
- Concrete
- Length
- 31 ft
- 1 main span
- Daily traffic
- 4,310
- 2005 count
- Owner
- County
- County Highway Agency
About this bridge
Silverado Trail over Bell Canyon Creek is a concrete slab carrying Silverado Trail over Bell Canyon Creek in Napa County, California. It was built in 1936 and reconstructed in 1976, so it is 89 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 4,310 vehicles a day, roughly 10% of them trucks, projected to reach 6,609 by 2040. The structure is 31 ft (9.5 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Silverado Trail over Bell Canyon Creek built?
It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1976.
What condition is Silverado Trail over Bell Canyon 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 May 2023.
How much traffic does Silverado Trail over Bell Canyon Creek carry?
About 4,310 vehicles per day (2005 count), of which roughly 10% are trucks.
How long is Silverado Trail over Bell Canyon Creek?
The structure is 31 ft (9.5 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.
Who owns Silverado Trail over Bell Canyon Creek?
It is owned by the County Highway Agency.