State Route 91 over Gypsum Canyon RD
GoodOrange County, California · 12-ORA-091-R16.40-ANA · Structure no. 55 0506
- Built
- 1971
- 54 years old, rebuilt 1994
- Condition
- Good
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 129 ft
- 1 main span
- Daily traffic
- 290,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 91 over Gypsum Canyon RD is a prestressed concrete box beam or girders - multiple carrying State Route 91 over Gypsum Canyon RD in Orange County, California. It was built in 1971 and reconstructed in 1994, 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 328,000 by 2041. The structure is 129 ft (39.3 m) long and 228 ft wide. If it were closed, the detour would be 3.7 mi (6 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 91 over Gypsum Canyon RD built?
It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1994.
What condition is State Route 91 over Gypsum Canyon RD 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 RD carry?
About 290,000 vehicles per day (2020 count), of which roughly 8% are trucks.
How long is State Route 91 over Gypsum Canyon RD?
The structure is 129 ft (39.3 m) long with a longest span of 125 ft (38.1 m) and a deck 228 ft wide.
Who owns State Route 91 over Gypsum Canyon RD?
It is owned by the State Highway Agency.