US Bridges

IH 41 NB over Soo Line

Good

Winnebago County, Wisconsin · 4.8M N JCT Ush 45 to N · Structure no. B70007100000000

Built
1975
50 years old, rebuilt 2010
Condition
Good
inspected June 2023
Type
Slab
Concrete Continuous
Length
121 ft
3 main spans
Daily traffic
39,350
2023 count
Owner
State
State Highway Agency

About this bridge

IH 41 NB over Soo Line is a concrete continuous slab carrying IH 41 NB over Soo Line in Winnebago County, Wisconsin. It was built in 1975 and reconstructed in 2010, so it is 50 years old, older 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 39,350 vehicles a day, roughly 18% of them trucks, projected to reach 57,750 by 2042. The structure is 121 ft (37 m) long and 63 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIH 41 NB
CrossesSoo Line
Location4.8M N JCT Ush 45 to N
RouteInterstate 41
Coordinates44.14955, -88.48691
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length121 ft (37 m)
Longest span49 ft (14.9 m)
Deck width63 ft (19.1 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,350 (2023)
Projected traffic57,750 by 2042
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 41 NB over Soo Line built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2010.

What condition is IH 41 NB over Soo Line 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 June 2023.

How much traffic does IH 41 NB over Soo Line carry?

About 39,350 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is IH 41 NB over Soo Line?

The structure is 121 ft (37 m) long with a longest span of 49 ft (14.9 m) and a deck 63 ft wide.

Who owns IH 41 NB over Soo Line?

It is owned by the State Highway Agency.