State Route 91 over Mission Inn Ave
FairRiverside County, California · 08-RIV-091-20.53-RIV · Structure no. 56 0315
- Built
- 1957
- 68 years old, rebuilt 2003
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 110 ft
- 1 main span
- Daily traffic
- 191,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 91 over Mission Inn Ave is a steel stringer/multi-beam or girder carrying State Route 91 over Mission Inn Ave in Riverside County, California. It was built in 1957 and reconstructed in 2003, so it is 68 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 191,000 vehicles a day, roughly 5% of them trucks, projected to reach 241,523 by 2041. The structure is 110 ft (33.6 m) long and 153 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 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 Mission Inn Ave built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2003.
What condition is State Route 91 over Mission Inn Ave 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 October 2023.
How much traffic does State Route 91 over Mission Inn Ave carry?
About 191,000 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is State Route 91 over Mission Inn Ave?
The structure is 110 ft (33.6 m) long with a longest span of 106 ft (32.3 m) and a deck 153 ft wide.
Who owns State Route 91 over Mission Inn Ave?
It is owned by the State Highway Agency.