IH 39 over Sth 78
GoodColumbia County, Wisconsin · 0.5M S JCT Sth 78 to S · Structure no. B11009900000000
- Built
- 1993
- 32 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 227 ft
- 2 main spans
- Daily traffic
- 10,300
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
IH 39 over Sth 78 is a steel continuous stringer/multi-beam or girder carrying IH 39 over Sth 78 in Columbia County, Wisconsin. It was built in 1993, so it is 32 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 10,300 vehicles a day, roughly 23% of them trucks, projected to reach 12,360 by 2041. The structure is 227 ft (69.3 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IH 39 over Sth 78 built?
It was built in 1993, making it 32 years old in 2025.
What condition is IH 39 over Sth 78 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 September 2023.
How much traffic does IH 39 over Sth 78 carry?
About 10,300 vehicles per day (2021 count), of which roughly 23% are trucks.
How long is IH 39 over Sth 78?
The structure is 227 ft (69.3 m) long with a longest span of 113 ft (34.3 m) and a deck 42 ft wide.
Who owns IH 39 over Sth 78?
It is owned by the State Highway Agency.