Sth 21 over Silver Creek
GoodMonroe County, Wisconsin · 0.8M E JCT Cth Q · Structure no. B41020300000000
- Built
- 1997
- 28 years old
- Condition
- Good
- inspected October 2022
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 94 ft
- 1 main span
- Daily traffic
- 4,000
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 21 over Silver Creek is a prestressed concrete stringer/multi-beam or girder carrying Sth 21 over Silver Creek in Monroe County, Wisconsin. It was built in 1997, so it is 28 years old, younger 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 4,000 vehicles a day, projected to reach 4,800 by 2041. The structure is 94 ft (28.7 m) long and 47 ft wide. If it were closed, the detour would be 2.5 mi (4 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sth 21 over Silver Creek built?
It was built in 1997, making it 28 years old in 2025.
What condition is Sth 21 over Silver 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 October 2022.
How much traffic does Sth 21 over Silver Creek carry?
About 4,000 vehicles per day (2021 count).
How long is Sth 21 over Silver Creek?
The structure is 94 ft (28.7 m) long with a longest span of 90 ft (27.4 m) and a deck 47 ft wide.
Who owns Sth 21 over Silver Creek?
It is owned by the State Highway Agency.