US Bridges

IH 39 NB / IH 90 W over Ush 51

Fair

Dane County, Wisconsin · 3.4M W JCT Ush 151 to N · Structure no. B13009900000000

Built
1960
65 years old, rebuilt 1984
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
257 ft
4 main spans
Daily traffic
34,500
2022 count
Owner
State
State Highway Agency

About this bridge

IH 39 NB / IH 90 W over Ush 51 is a steel stringer/multi-beam or girder carrying IH 39 NB / IH 90 W over Ush 51 in Dane County, Wisconsin. It was built in 1960 and reconstructed in 1984, so it is 65 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 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 34,500 vehicles a day, roughly 16% of them trucks, projected to reach 41,400 by 2042. The structure is 257 ft (78.4 m) long and 86 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesIH 39 NB / IH 90 W
CrossesUsh 51
Location3.4M W JCT Ush 151 to N
RouteInterstate 39
CountyDane County
StateWisconsin
Coordinates43.17907, -89.32406
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length257 ft (78.4 m)
Longest span78 ft (23.8 m)
Deck width86 ft (26.2 m)
Roadway width83 ft (25.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,500 (2022)
Projected traffic41,400 by 2042
Trucks16%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 39 NB / IH 90 W over Ush 51 built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1984.

What condition is IH 39 NB / IH 90 W over Ush 51 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 / IH 90 W over Ush 51 carry?

About 34,500 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is IH 39 NB / IH 90 W over Ush 51?

The structure is 257 ft (78.4 m) long with a longest span of 78 ft (23.8 m) and a deck 86 ft wide.

Who owns IH 39 NB / IH 90 W over Ush 51?

It is owned by the State Highway Agency.