Sth 121 over IH 94
FairJackson County, Wisconsin · 2.7M E JCT Cth G · Structure no. B27004600000000
- Built
- 1966
- 59 years old, rebuilt 2008
- Condition
- Fair
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 304 ft
- 4 main spans
- Daily traffic
- 1,900
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 121 over IH 94 is a steel continuous stringer/multi-beam or girder carrying Sth 121 over IH 94 in Jackson County, Wisconsin. It was built in 1966 and reconstructed in 2008, so it is 59 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 1,900 vehicles a day, roughly 5% of them trucks, projected to reach 2,280 by 2039. The structure is 304 ft (92.7 m) long and 35 ft wide. If it were closed, the detour would be 12.4 mi (20 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 | 7 Good | Some minor problems. |
| 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 Sth 121 over IH 94 built?
It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2008.
What condition is Sth 121 over IH 94 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 November 2023.
How much traffic does Sth 121 over IH 94 carry?
About 1,900 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Sth 121 over IH 94?
The structure is 304 ft (92.7 m) long with a longest span of 93 ft (28.2 m) and a deck 35 ft wide.
Who owns Sth 121 over IH 94?
It is owned by the State Highway Agency.