Sth 121 over N Br Trempealeau River
FairJackson County, Wisconsin · 4.8M E JCT IH 94 to E · Structure no. B27096400000000
- Built
- 1936
- 89 years old, rebuilt 2003
- Condition
- Fair
- inspected September 2023
- Type
- Slab
- Concrete
- Length
- 33 ft
- 1 main span
- Daily traffic
- 530
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 121 over N Br Trempealeau River is a concrete slab carrying Sth 121 over N Br Trempealeau River in Jackson County, Wisconsin. It was built in 1936 and reconstructed in 2003, so it is 89 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 5 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 530 vehicles a day, roughly 5% of them trucks, projected to reach 636 by 2042. The structure is 33 ft (10.1 m) long and 32 ft wide. If it were closed, the detour would be 20.5 mi (33 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 | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sth 121 over N Br Trempealeau River built?
It was built in 1936, making it 89 years old in 2025. It was reconstructed in 2003.
What condition is Sth 121 over N Br Trempealeau 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 September 2023.
How much traffic does Sth 121 over N Br Trempealeau River carry?
About 530 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Sth 121 over N Br Trempealeau River?
The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.6 m) and a deck 32 ft wide.
Who owns Sth 121 over N Br Trempealeau River?
It is owned by the State Highway Agency.