Sth 21 over Wisconsin River
FairAdams County, Wisconsin · 2.2M E JCT Cth G · Structure no. B01001300000000
- Built
- 1959
- 66 years old, rebuilt 2002
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 886 ft
- 9 main spans
- Daily traffic
- 4,600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 21 over Wisconsin River is a steel stringer/multi-beam or girder carrying Sth 21 over Wisconsin River in Adams County, Wisconsin. It was built in 1959 and reconstructed in 2002, so it is 66 years old, older 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 4,600 vehicles a day, roughly 9% of them trucks, projected to reach 5,520 by 2039. The structure is 886 ft (270.1 m) long and 33 ft wide. If it were closed, the detour would be 31.7 mi (51 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sth 21 over Wisconsin River built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2002.
What condition is Sth 21 over Wisconsin 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 June 2023.
How much traffic does Sth 21 over Wisconsin River carry?
About 4,600 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is Sth 21 over Wisconsin River?
The structure is 886 ft (270.1 m) long with a longest span of 112 ft (34 m) and a deck 33 ft wide.
Who owns Sth 21 over Wisconsin River?
It is owned by the State Highway Agency.