Sth IRR (sth 55) over Swamp Creek
GoodForest County, Wisconsin · 1.1M N JCT Cth M · Structure no. B21000600000000
- Built
- 1977
- 48 years old
- Condition
- Good
- inspected June 2021
- Type
- Culvert
- Concrete Continuous
- Length
- 39 ft
- 3 main spans
- Daily traffic
- 2,100
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Sth IRR (sth 55) over Swamp Creek is a concrete continuous culvert carrying Sth IRR (sth 55) over Swamp Creek in Forest County, Wisconsin. It was built in 1977, so it is 48 years old, older 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 2,100 vehicles a day, roughly 8% of them trucks, projected to reach 2,520 by 2042. The structure is 39 ft (12 m) long. If it were closed, the detour would be 60.9 mi (98 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sth IRR (sth 55) over Swamp Creek built?
It was built in 1977, making it 48 years old in 2025.
What condition is Sth IRR (sth 55) over Swamp Creek 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 June 2021.
How much traffic does Sth IRR (sth 55) over Swamp Creek carry?
About 2,100 vehicles per day (2022 count), of which roughly 8% are trucks.
How long is Sth IRR (sth 55) over Swamp Creek?
The structure is 39 ft (12 m) long with a longest span of 12 ft (3.7 m).
Who owns Sth IRR (sth 55) over Swamp Creek?
It is owned by the State Highway Agency.