US Bridges

IH 43 SB over Sth 54 Eb-Sth 57 NB

Fair

Brown County, Wisconsin · 0.7M S JCT Sth 54 to E · Structure no. B05021200000000

Built
1979
46 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
174 ft
3 main spans
Daily traffic
18,200
2024 count
Owner
State
State Highway Agency

About this bridge

IH 43 SB over Sth 54 Eb-Sth 57 NB is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 SB over Sth 54 Eb-Sth 57 NB in Brown County, Wisconsin. It was built in 1979, so it is 46 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 18,200 vehicles a day, roughly 22% of them trucks, projected to reach 50,400 by 2043. The structure is 174 ft (52.9 m) long and 45 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIH 43 SB
CrossesSth 54 Eb-Sth 57 NB
Location0.7M S JCT Sth 54 to E
RouteInterstate 43
Coordinates44.51834, -87.95393
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
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 rating79.1 US tons
Inventory rating34 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length174 ft (52.9 m)
Longest span97 ft (29.6 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,200 (2024)
Projected traffic50,400 by 2043
Trucks22%
Lanes on structure2
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 43 SB over Sth 54 Eb-Sth 57 NB built?

It was built in 1979, making it 46 years old in 2025.

What condition is IH 43 SB over Sth 54 Eb-Sth 57 NB 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 2024.

How much traffic does IH 43 SB over Sth 54 Eb-Sth 57 NB carry?

About 18,200 vehicles per day (2024 count), of which roughly 22% are trucks.

How long is IH 43 SB over Sth 54 Eb-Sth 57 NB?

The structure is 174 ft (52.9 m) long with a longest span of 97 ft (29.6 m) and a deck 45 ft wide.

Who owns IH 43 SB over Sth 54 Eb-Sth 57 NB?

It is owned by the State Highway Agency.