IH 43 SB over Sth 120
FairWalworth County, Wisconsin · 2.0 MI S JCT Sth 20 · Structure no. B64009100000000
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 206 ft
- 2 main spans
- Daily traffic
- 11,550
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
IH 43 SB over Sth 120 is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 SB over Sth 120 in Walworth County, Wisconsin. It was built in 1971, so it is 54 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 11,550 vehicles a day, roughly 16% of them trucks, projected to reach 13,860 by 2042. The structure is 206 ft (62.7 m) long and 55 ft wide.
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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IH 43 SB over Sth 120 built?
It was built in 1971, making it 54 years old in 2025.
What condition is IH 43 SB over Sth 120 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 October 2023.
How much traffic does IH 43 SB over Sth 120 carry?
About 11,550 vehicles per day (2022 count), of which roughly 16% are trucks.
How long is IH 43 SB over Sth 120?
The structure is 206 ft (62.7 m) long with a longest span of 103 ft (31.4 m) and a deck 55 ft wide.
Who owns IH 43 SB over Sth 120?
It is owned by the State Highway Agency.