Sth 121 over Trempealeau River
FairTrempealeau County, Wisconsin · 2.7M E JCT Sth 93 to S · Structure no. B61006300000000
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected October 2024
- Type
- Slab
- Concrete Continuous
- Length
- 162 ft
- 3 main spans
- Daily traffic
- 3,700
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 121 over Trempealeau River is a concrete continuous slab carrying Sth 121 over Trempealeau River in Trempealeau County, Wisconsin. It was built in 1980, so it is 45 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 3,700 vehicles a day, roughly 6% of them trucks, projected to reach 4,440 by 2043. The structure is 162 ft (49.3 m) long and 43 ft wide. If it were closed, the detour would be 33.6 mi (54 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 121 over Trempealeau River built?
It was built in 1980, making it 45 years old in 2025.
What condition is Sth 121 over 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 October 2024.
How much traffic does Sth 121 over Trempealeau River carry?
About 3,700 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is Sth 121 over Trempealeau River?
The structure is 162 ft (49.3 m) long with a longest span of 65 ft (19.7 m) and a deck 43 ft wide.
Who owns Sth 121 over Trempealeau River?
It is owned by the State Highway Agency.