Santiago Canyon RD over Williams Canyon Creek
FairOrange County, California · 0.8 MI N/O Modjeska RD · Structure no. 55C0059
- Built
- 1970
- 55 years old, rebuilt 1983
- Condition
- Fair
- inspected April 2023
- Type
- Slab
- Concrete
- Length
- 35 ft
- 1 main span
- Daily traffic
- 8,000
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Santiago Canyon RD over Williams Canyon Creek is a concrete slab carrying Santiago Canyon RD over Williams Canyon Creek in Orange County, California. It was built in 1970 and reconstructed in 1983, so it is 55 years old, older 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 8,000 vehicles a day, roughly 3% of them trucks, projected to reach 12,365 by 2041. The structure is 35 ft (10.7 m) long and 53 ft wide. If it were closed, the detour would be 13.7 mi (22 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Santiago Canyon RD over Williams Canyon Creek built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1983.
What condition is Santiago Canyon RD over Williams Canyon Creek 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 April 2023.
How much traffic does Santiago Canyon RD over Williams Canyon Creek carry?
About 8,000 vehicles per day (2021 count), of which roughly 3% are trucks.
How long is Santiago Canyon RD over Williams Canyon Creek?
The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10.1 m) and a deck 53 ft wide.
Who owns Santiago Canyon RD over Williams Canyon Creek?
It is owned by the County Highway Agency.