Santiago Cnyn Road over Limestone Canyon
GoodOrange County, California · 4.4 MI Se/O Jamboree Rd. · Structure no. 55C0065
- Built
- 1931
- 94 years old, rebuilt 1955
- Condition
- Good
- inspected April 2023
- Type
- Culvert
- Concrete
- Length
- 26 ft
- 2 main spans
- Daily traffic
- 8,000
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Santiago Cnyn Road over Limestone Canyon is a concrete culvert carrying Santiago Cnyn Road over Limestone Canyon in Orange County, California. It was built in 1931 and reconstructed in 1955, so it is 94 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 8,000 vehicles a day, roughly 3% of them trucks, projected to reach 12,426 by 2041. The structure is 26 ft (7.9 m) long and 42 ft wide. If it were closed, the detour would be 14.3 mi (23 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Santiago Cnyn Road over Limestone Canyon built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1955.
What condition is Santiago Cnyn Road over Limestone Canyon 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 April 2023.
How much traffic does Santiago Cnyn Road over Limestone Canyon carry?
About 8,000 vehicles per day (2021 count), of which roughly 3% are trucks.
How long is Santiago Cnyn Road over Limestone Canyon?
The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 42 ft wide.
Who owns Santiago Cnyn Road over Limestone Canyon?
It is owned by the County Highway Agency.