I 90 over Rock River
FairRock County, Minnesota · 0.8 MI E of JCT TH75 · Structure no. 67805
- Built
- 1965
- 60 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 194 ft
- 3 main spans
- Daily traffic
- 5,696
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Rock River is a steel continuous stringer/multi-beam or girder carrying I 90 over Rock River in Rock County, Minnesota. It was built in 1965, so it is 60 years old, older than the Minnesota average of 38.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 5,696 vehicles a day, roughly 13% of them trucks, projected to reach 4,900 by 2042. The structure is 194 ft (59.1 m) long and 41 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over Rock River built?
It was built in 1965, making it 60 years old in 2025.
What condition is I 90 over Rock River 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 August 2024.
How much traffic does I 90 over Rock River carry?
About 5,696 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is I 90 over Rock River?
The structure is 194 ft (59.1 m) long with a longest span of 74 ft (22.6 m) and a deck 41 ft wide.
Who owns I 90 over Rock River?
It is owned by the State Highway Agency.