US Bridges

USH51NB to STH29WB over Canadian National RR

Fair

Marathon County, Wisconsin · 1.8M N of Rib Mountain DR · Structure no. B37036000010000

Built
2008
17 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
620 ft
5 main spans
Daily traffic
7,200
2022 count
Owner
State
State Highway Agency

About this bridge

USH51NB to STH29WB over Canadian National RR is a prestressed concrete continuous stringer/multi-beam or girder carrying USH51NB to STH29WB over Canadian National RR in Marathon County, Wisconsin. It was built in 2008, so it is 17 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 7,200 vehicles a day, projected to reach 10,800 by 2043. The structure is 620 ft (189 m) long and 43 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesUSH51NB to STH29WB
CrossesCanadian National RR
Location1.8M N of Rib Mountain DR
RouteU.S. Route 51
CountyMarathon County
StateWisconsin
Coordinates44.95342, -89.66861
Functional classUrban Other Principal Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 48 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 rating82.8 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length620 ft (189 m)
Longest span131 ft (39.8 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,200 (2022)
Projected traffic10,800 by 2043
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 USH51NB to STH29WB over Canadian National RR built?

It was built in 2008, making it 17 years old in 2025.

What condition is USH51NB to STH29WB over Canadian National RR 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 June 2024.

How much traffic does USH51NB to STH29WB over Canadian National RR carry?

About 7,200 vehicles per day (2022 count).

How long is USH51NB to STH29WB over Canadian National RR?

The structure is 620 ft (189 m) long with a longest span of 131 ft (39.8 m) and a deck 43 ft wide.

Who owns USH51NB to STH29WB over Canadian National RR?

It is owned by the State Highway Agency.