Sth 81 over Platte River
GoodGrant County, Wisconsin · 4.4M E JCT Ush 61 to S · Structure no. B22022800000000
- Built
- 2011
- 14 years old
- Condition
- Good
- inspected October 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 274 ft
- 3 main spans
- Daily traffic
- 3,900
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 81 over Platte River is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 81 over Platte River in Grant County, Wisconsin. It was built in 2011, so it is 14 years old, younger than the Wisconsin average of 40.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 3,900 vehicles a day, projected to reach 4,900 by 2040. The structure is 274 ft (83.4 m) long and 47 ft wide. If it were closed, the detour would be 10.6 mi (17 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 81 over Platte River built?
It was built in 2011, making it 14 years old in 2025.
What condition is Sth 81 over Platte River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2021.
How much traffic does Sth 81 over Platte River carry?
About 3,900 vehicles per day (2022 count).
How long is Sth 81 over Platte River?
The structure is 274 ft (83.4 m) long with a longest span of 100 ft (30.5 m) and a deck 47 ft wide.
Who owns Sth 81 over Platte River?
It is owned by the State Highway Agency.