Road 63 over Stones Canyon
FairModoc County, California · 1.7 MI W of SH 395 · Structure no. 03C0044
- Built
- 1976
- 49 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 31 ft
- 1 main span
- Daily traffic
- 50
- 2012 count
- Owner
- County
- County Highway Agency
About this bridge
Road 63 over Stones Canyon is a steel stringer/multi-beam or girder carrying Road 63 over Stones Canyon in Modoc County, California. It was built in 1976, so it is 49 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 50 vehicles a day, roughly 5% of them trucks, projected to reach 92 by 2041. The structure is 31 ft (9.4 m) long and 25 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 63 over Stones Canyon built?
It was built in 1976, making it 49 years old in 2025.
What condition is Road 63 over Stones Canyon 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 August 2023.
How much traffic does Road 63 over Stones Canyon carry?
About 50 vehicles per day (2012 count), of which roughly 5% are trucks.
How long is Road 63 over Stones Canyon?
The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.8 m) and a deck 25 ft wide.
Who owns Road 63 over Stones Canyon?
It is owned by the County Highway Agency.