State Route 91 over Gypsum Canyon Creek
GoodOrange County, California · 12-ORA-091-R16.46-ANA · Structure no. 55 0607
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected August 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 38 ft
- 3 main spans
- Daily traffic
- 290,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 91 over Gypsum Canyon Creek is a concrete continuous culvert carrying State Route 91 over Gypsum Canyon Creek in Orange County, California. It was built in 1971, so it is 54 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 290,000 vehicles a day, roughly 8% of them trucks, projected to reach 430,925 by 2041. The structure is 38 ft (11.6 m) long and 188 ft wide. If it were closed, the detour would be 1.2 mi (2 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 State Route 91 over Gypsum Canyon Creek built?
It was built in 1971, making it 54 years old in 2025.
What condition is State Route 91 over Gypsum Canyon 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 2024.
How much traffic does State Route 91 over Gypsum Canyon Creek carry?
About 290,000 vehicles per day (2020 count), of which roughly 8% are trucks.
How long is State Route 91 over Gypsum Canyon Creek?
The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m) and a deck 188 ft wide.
Who owns State Route 91 over Gypsum Canyon Creek?
It is owned by the State Highway Agency.