Sth 11-STH 81 over Sugar River
FairGreen County, Wisconsin · 3.1M E JCT Cth Ok · Structure no. B23004000000000
- Built
- 1975
- 50 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 230 ft
- 3 main spans
- Daily traffic
- 7,800
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 11-STH 81 over Sugar River is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 11-STH 81 over Sugar River in Green County, Wisconsin. It was built in 1975, so it is 50 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 7,800 vehicles a day, roughly 13% of them trucks, projected to reach 6,700 by 2043. The structure is 230 ft (70 m) long and 48 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 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 Sth 11-STH 81 over Sugar River built?
It was built in 1975, making it 50 years old in 2025.
What condition is Sth 11-STH 81 over Sugar 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 Sth 11-STH 81 over Sugar River carry?
About 7,800 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is Sth 11-STH 81 over Sugar River?
The structure is 230 ft (70 m) long with a longest span of 76 ft (23.3 m) and a deck 48 ft wide.
Who owns Sth 11-STH 81 over Sugar River?
It is owned by the State Highway Agency.