US Bridges

Ush 51/STH 73 over IH 39/90

Good

Dane County, Wisconsin · 2.9M N JCT Sth 59 · Structure no. B13070200000000

Built
2015
10 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
258 ft
2 main spans
Daily traffic
8,300
2022 count
Owner
State
State Highway Agency

About this bridge

Ush 51/STH 73 over IH 39/90 is a prestressed concrete continuous stringer/multi-beam or girder carrying Ush 51/STH 73 over IH 39/90 in Dane County, Wisconsin. It was built in 2015, so it is 10 years old, younger 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 8,300 vehicles a day, roughly 10% of them trucks, projected to reach 9,960 by 2042. The structure is 258 ft (78.5 m) long and 98 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesUsh 51/STH 73
CrossesIH 39/90
Location2.9M N JCT Sth 59
RouteU.S. Route 51
CountyDane County
StateWisconsin
Coordinates42.87291, -89.05611
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.3 US tons
Inventory rating51.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length258 ft (78.5 m)
Longest span127 ft (38.6 m)
Deck width98 ft (29.8 m)
Roadway width89 ft (27.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,300 (2022)
Projected traffic9,960 by 2042
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

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 Ush 51/STH 73 over IH 39/90 built?

It was built in 2015, making it 10 years old in 2025.

What condition is Ush 51/STH 73 over IH 39/90 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 September 2023.

How much traffic does Ush 51/STH 73 over IH 39/90 carry?

About 8,300 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Ush 51/STH 73 over IH 39/90?

The structure is 258 ft (78.5 m) long with a longest span of 127 ft (38.6 m) and a deck 98 ft wide.

Who owns Ush 51/STH 73 over IH 39/90?

It is owned by the State Highway Agency.