IH 90 Wb-Ih 94 WB over Mirror Lake
FairSauk County, Wisconsin · 1.8M W JCT Ush 12 to E · Structure no. B56004800000000
- Built
- 1961
- 64 years old, rebuilt 1991
- Condition
- Fair
- inspected September 2024
- Type
- Frame
- Steel Continuous
- Length
- 325 ft
- 3 main spans
- Daily traffic
- 23,500
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
IH 90 Wb-Ih 94 WB over Mirror Lake is a steel continuous frame carrying IH 90 Wb-Ih 94 WB over Mirror Lake in Sauk County, Wisconsin. It was built in 1961 and reconstructed in 1991, so it is 64 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 5 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 23,500 vehicles a day, roughly 13% of them trucks, projected to reach 28,200 by 2041. The structure is 325 ft (99.2 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IH 90 Wb-Ih 94 WB over Mirror Lake built?
It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1991.
What condition is IH 90 Wb-Ih 94 WB over Mirror Lake 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 2024.
How much traffic does IH 90 Wb-Ih 94 WB over Mirror Lake carry?
About 23,500 vehicles per day (2021 count), of which roughly 13% are trucks.
How long is IH 90 Wb-Ih 94 WB over Mirror Lake?
The structure is 325 ft (99.2 m) long with a longest span of 220 ft (67.1 m) and a deck 35 ft wide.
Who owns IH 90 Wb-Ih 94 WB over Mirror Lake?
It is owned by the State Highway Agency.