USH12-STH29 over Union Pacific RR
FairDunn County, Wisconsin · 1.0M W JCT Sth 40 · Structure no. B17011600000000
- Built
- 1989
- 36 years old
- Condition
- Fair
- inspected August 2024
- Type
- Slab
- Concrete Continuous
- Length
- 175 ft
- 3 main spans
- Daily traffic
- 13,400
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
USH12-STH29 over Union Pacific RR is a concrete continuous slab carrying USH12-STH29 over Union Pacific RR in Dunn County, Wisconsin. It was built in 1989, so it is 36 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 13,400 vehicles a day, roughly 20% of them trucks, projected to reach 11,400 by 2043. The structure is 175 ft (53.3 m) long and 47 ft wide. If it were closed, the detour would be 42.9 mi (69 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was USH12-STH29 over Union Pacific RR built?
It was built in 1989, making it 36 years old in 2025.
What condition is USH12-STH29 over Union Pacific RR 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 August 2024.
How much traffic does USH12-STH29 over Union Pacific RR carry?
About 13,400 vehicles per day (2023 count), of which roughly 20% are trucks.
How long is USH12-STH29 over Union Pacific RR?
The structure is 175 ft (53.3 m) long with a longest span of 67 ft (20.4 m) and a deck 47 ft wide.
Who owns USH12-STH29 over Union Pacific RR?
It is owned by the State Highway Agency.