IH 43 SB over Cth Nn
FairBrown County, Wisconsin · 2.7M S JCT Cth Mm to W · Structure no. B05024300000000
- Built
- 1981
- 44 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 240 ft
- 3 main spans
- Daily traffic
- 11,150
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
IH 43 SB over Cth Nn is a steel continuous stringer/multi-beam or girder carrying IH 43 SB over Cth Nn in Brown County, Wisconsin. It was built in 1981, so it is 44 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 11,150 vehicles a day, roughly 22% of them trucks, projected to reach 22,400 by 2043. The structure is 240 ft (73 m) long and 43 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 | 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 Cth Nn built?
It was built in 1981, making it 44 years old in 2025.
What condition is IH 43 SB over Cth Nn 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 May 2024.
How much traffic does IH 43 SB over Cth Nn carry?
About 11,150 vehicles per day (2022 count), of which roughly 22% are trucks.
How long is IH 43 SB over Cth Nn?
The structure is 240 ft (73 m) long with a longest span of 111 ft (33.7 m) and a deck 43 ft wide.
Who owns IH 43 SB over Cth Nn?
It is owned by the State Highway Agency.