US Bridges

IH USH51-IH39 NB over Sth 23WB-STH 82EB

Fair

Marquette County, Wisconsin · 6.4M N JCT Sth 23 to W · Structure no. B39002600000000

Built
1986
39 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
139 ft
1 main span
Daily traffic
7,350
2021 count
Owner
State
State Highway Agency

About this bridge

IH USH51-IH39 NB over Sth 23WB-STH 82EB is a steel stringer/multi-beam or girder carrying IH USH51-IH39 NB over Sth 23WB-STH 82EB in Marquette County, Wisconsin. It was built in 1986, so it is 39 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 7,350 vehicles a day, roughly 20% of them trucks, projected to reach 8,820 by 2041. The structure is 139 ft (42.4 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesIH USH51-IH39 NB
CrossesSth 23WB-STH 82EB
Location6.4M N JCT Sth 23 to W
RouteInterstate 39
CountyMarquette County
StateWisconsin
Coordinates43.79063, -89.48306
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 rating73.9 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length139 ft (42.4 m)
Longest span134 ft (40.7 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,350 (2021)
Projected traffic8,820 by 2041
Trucks20%
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 USH51-IH39 NB over Sth 23WB-STH 82EB built?

It was built in 1986, making it 39 years old in 2025.

What condition is IH USH51-IH39 NB over Sth 23WB-STH 82EB 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 April 2024.

How much traffic does IH USH51-IH39 NB over Sth 23WB-STH 82EB carry?

About 7,350 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is IH USH51-IH39 NB over Sth 23WB-STH 82EB?

The structure is 139 ft (42.4 m) long with a longest span of 134 ft (40.7 m) and a deck 43 ft wide.

Who owns IH USH51-IH39 NB over Sth 23WB-STH 82EB?

It is owned by the State Highway Agency.