US Bridges

IH 39 NB over Ush 51 SB

Fair

Columbia County, Wisconsin · 1.8M N JCT Sth 16 to E · Structure no. B11006200000000

Built
1990
35 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
165 ft
3 main spans
Daily traffic
7,750
2022 count
Owner
State
State Highway Agency

About this bridge

IH 39 NB over Ush 51 SB is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 39 NB over Ush 51 SB in Columbia County, Wisconsin. It was built in 1990, so it is 35 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 7,750 vehicles a day, roughly 10% of them trucks, projected to reach 9,300 by 2043. The structure is 165 ft (50.2 m) long and 42 ft wide.

CarriesIH 39 NB
CrossesUsh 51 SB
Location1.8M N JCT Sth 16 to E
RouteInterstate 39
Coordinates43.57677, -89.47064
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length165 ft (50.2 m)
Longest span73 ft (22.3 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,750 (2022)
Projected traffic9,300 by 2043
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 39 NB over Ush 51 SB built?

It was built in 1990, making it 35 years old in 2025.

What condition is IH 39 NB over Ush 51 SB 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 IH 39 NB over Ush 51 SB carry?

About 7,750 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is IH 39 NB over Ush 51 SB?

The structure is 165 ft (50.2 m) long with a longest span of 73 ft (22.3 m) and a deck 42 ft wide.

Who owns IH 39 NB over Ush 51 SB?

It is owned by the State Highway Agency.