US Bridges

IH 39 SB over Ush 51 SB

Fair

Columbia County, Wisconsin · 0.3M S JCT Ush 51 · Structure no. B11006300000000

Built
1991
34 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
156 ft
3 main spans
Daily traffic
15,500
2023 count
Owner
State
State Highway Agency

About this bridge

IH 39 SB over Ush 51 SB is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 39 SB over Ush 51 SB in Columbia County, Wisconsin. It was built in 1991, so it is 34 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 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 15,500 vehicles a day, roughly 10% of them trucks, projected to reach 15,650 by 2042. The structure is 156 ft (47.6 m) long and 43 ft wide.

CarriesIH 39 SB
CrossesUsh 51 SB
Location0.3M S JCT Ush 51
RouteInterstate 39
Coordinates43.57748, -89.47069
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 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 rating77.4 US tons
Inventory rating37.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length156 ft (47.6 m)
Longest span73 ft (22.4 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,500 (2023)
Projected traffic15,650 by 2042
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 SB over Ush 51 SB built?

It was built in 1991, making it 34 years old in 2025.

What condition is IH 39 SB 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 May 2023.

How much traffic does IH 39 SB over Ush 51 SB carry?

About 15,500 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is IH 39 SB over Ush 51 SB?

The structure is 156 ft (47.6 m) long with a longest span of 73 ft (22.4 m) and a deck 43 ft wide.

Who owns IH 39 SB over Ush 51 SB?

It is owned by the State Highway Agency.