Sth 57 Sb|mill ST over Onion River
FairSheboygan County, Wisconsin · 0.4M W JCT Sth 57 to N · Structure no. B59015800000000
- Built
- 1993
- 32 years old
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 60 ft
- 1 main span
- Daily traffic
- 6,500
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 57 Sb|mill ST over Onion River is a prestressed concrete stringer/multi-beam or girder carrying Sth 57 Sb|mill ST over Onion River in Sheboygan County, Wisconsin. It was built in 1993, so it is 32 years old, younger 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 6,500 vehicles a day, roughly 8% of them trucks, projected to reach 16,720 by 2043. The structure is 60 ft (18.2 m) long and 42 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 | 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 57 Sb|mill ST over Onion River built?
It was built in 1993, making it 32 years old in 2025.
What condition is Sth 57 Sb|mill ST over Onion River 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 June 2024.
How much traffic does Sth 57 Sb|mill ST over Onion River carry?
About 6,500 vehicles per day (2022 count), of which roughly 8% are trucks.
How long is Sth 57 Sb|mill ST over Onion River?
The structure is 60 ft (18.2 m) long with a longest span of 58 ft (17.7 m) and a deck 42 ft wide.
Who owns Sth 57 Sb|mill ST over Onion River?
It is owned by the State Highway Agency.