Road 21N02 over Sulphur Creek
GoodSierra County, California · Sulphur Creek · Structure no. 051151000001030
- Built
- 1964
- 61 years old
- Condition
- Good
- inspected September 2023
- Type
- Arch - Deck
- Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 50
- Owner
- Federal
- U.S. Forest Service
About this bridge
Road 21N02 over Sulphur Creek is a concrete arch - deck carrying Road 21N02 over Sulphur Creek in Sierra County, California. It was built in 1964, so it is 61 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 30 ft (9.1 m) long and 16 ft wide. If it were closed, the detour would be 2.5 mi (4 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Road 21N02 over Sulphur Creek built?
It was built in 1964, making it 61 years old in 2025.
What condition is Road 21N02 over Sulphur 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 September 2023.
How much traffic does Road 21N02 over Sulphur Creek carry?
About 50 vehicles per day (latest count).
How long is Road 21N02 over Sulphur Creek?
The structure is 30 ft (9.1 m) long with a longest span of 26 ft (7.9 m) and a deck 16 ft wide.
Who owns Road 21N02 over Sulphur Creek?
It is owned by the U.S. Forest Service.