US Bridges

IH 39 NB over Wisconsin River

Fair

Columbia County, Wisconsin · 1.1M N JCT Sth 33 to E · Structure no. B11005500000000

Built
1964
61 years old, rebuilt 1990
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,123 ft
8 main spans
Daily traffic
10,050
2021 count
Owner
State
State Highway Agency

About this bridge

IH 39 NB over Wisconsin River is a steel continuous stringer/multi-beam or girder carrying IH 39 NB over Wisconsin River in Columbia County, Wisconsin. It was built in 1964 and reconstructed in 1990, so it is 61 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 10,050 vehicles a day, roughly 10% of them trucks, projected to reach 12,060 by 2041. The structure is 1,123 ft (342.4 m) long and 34 ft wide.

Location

Open in Google Maps
CarriesIH 39 NB
CrossesWisconsin River
Location1.1M N JCT Sth 33 to E
RouteInterstate 39
CountyColumbia County
StateWisconsin
Coordinates43.53818, -89.492
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.8 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length1,123 ft (342.4 m)
Longest span148 ft (45.1 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,050 (2021)
Projected traffic12,060 by 2041
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 39 NB over Wisconsin River built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1990.

What condition is IH 39 NB over Wisconsin 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 IH 39 NB over Wisconsin River carry?

About 10,050 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is IH 39 NB over Wisconsin River?

The structure is 1,123 ft (342.4 m) long with a longest span of 148 ft (45.1 m) and a deck 34 ft wide.

Who owns IH 39 NB over Wisconsin River?

It is owned by the State Highway Agency.