US Bridges

IH 43 SB over Fox River

Fair

Waukesha County, Wisconsin · 5.3 MI S JCT Sth 164 · Structure no. B67012700000000

Built
1971
54 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
201 ft
3 main spans
Daily traffic
17,400
2022 count
Owner
State
State Highway Agency

About this bridge

IH 43 SB over Fox River is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 SB over Fox River in Waukesha County, Wisconsin. It was built in 1971, so it is 54 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 5 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 17,400 vehicles a day, roughly 14% of them trucks, projected to reach 20,880 by 2042. The structure is 201 ft (61.4 m) long and 63 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIH 43 SB
CrossesFox River
Location5.3 MI S JCT Sth 164
RouteInterstate 43
CountyWaukesha County
StateWisconsin
Coordinates42.86845, -88.29616
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.7 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length201 ft (61.4 m)
Longest span67 ft (20.3 m)
Deck width63 ft (19.1 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,400 (2022)
Projected traffic20,880 by 2042
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 43 SB over Fox River built?

It was built in 1971, making it 54 years old in 2025.

What condition is IH 43 SB over Fox River 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 Fox River carry?

About 17,400 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is IH 43 SB over Fox River?

The structure is 201 ft (61.4 m) long with a longest span of 67 ft (20.3 m) and a deck 63 ft wide.

Who owns IH 43 SB over Fox River?

It is owned by the State Highway Agency.