Sth 59 over Rock River
FairRock County, Wisconsin · 0.6M E JCT IH 90 to E · Structure no. B53014600000000
- Built
- 1990
- 35 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 473 ft
- 5 main spans
- Daily traffic
- 10,300
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 59 over Rock River is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 59 over Rock River in Rock County, Wisconsin. It was built in 1990, so it is 35 years old, younger than the Wisconsin average of 40.3 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 10,300 vehicles a day, roughly 5% of them trucks, projected to reach 13,260 by 2041. The structure is 473 ft (144.1 m) long and 47 ft wide. If it were closed, the detour would be 12.4 mi (20 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 | 7 Good | Some minor problems. |
| 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 Sth 59 over Rock River built?
It was built in 1990, making it 35 years old in 2025.
What condition is Sth 59 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 September 2023.
How much traffic does Sth 59 over Rock River carry?
About 10,300 vehicles per day (2021 count), of which roughly 5% are trucks.
How long is Sth 59 over Rock River?
The structure is 473 ft (144.1 m) long with a longest span of 94 ft (28.7 m) and a deck 47 ft wide.
Who owns Sth 59 over Rock River?
It is owned by the State Highway Agency.