18N03 over South Fork Stony Creek
GoodColusa County, California · 0.3 Mi. N. of Jct. 18N01 · Structure no. 050853000001004
- Built
- 1975
- 50 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 57 ft
- 1 main span
- Daily traffic
- 150
- 1992 count
- Owner
- Federal
- U.S. Forest Service
About this bridge
18N03 over South Fork Stony Creek is a steel stringer/multi-beam or girder carrying 18N03 over South Fork Stony Creek in Colusa County, California. It was built in 1975, so it is 50 years old, younger 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 150 vehicles a day, roughly 2% of them trucks, projected to reach 225 by 2045. The structure is 57 ft (17.5 m) long and 18 ft wide. If it were closed, the detour would be 5.6 mi (9 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 18N03 over South Fork Stony Creek built?
It was built in 1975, making it 50 years old in 2025.
What condition is 18N03 over South Fork Stony 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 August 2023.
How much traffic does 18N03 over South Fork Stony Creek carry?
About 150 vehicles per day (1992 count), of which roughly 2% are trucks.
How long is 18N03 over South Fork Stony Creek?
The structure is 57 ft (17.5 m) long with a longest span of 56 ft (17.2 m) and a deck 18 ft wide.
Who owns 18N03 over South Fork Stony Creek?
It is owned by the U.S. Forest Service.