US Bridges

IH 43 NB over Sth 145

Good

Milwaukee County, Wisconsin · 1.0 MI N JCT IH 94 · Structure no. B40069000000000

Built
2006
19 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
224 ft
2 main spans
Daily traffic
72,000
2022 count
Owner
State
State Highway Agency

About this bridge

IH 43 NB over Sth 145 is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 NB over Sth 145 in Milwaukee County, Wisconsin. It was built in 2006, so it is 19 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 72,000 vehicles a day, roughly 11% of them trucks, projected to reach 66,550 by 2042. The structure is 224 ft (68.4 m) long and 86 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesIH 43 NB
CrossesSth 145
Location1.0 MI N JCT IH 94
RouteInterstate 43
Coordinates43.04927, -87.92572
Functional classUrban Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.5 US tons
Inventory rating41.1 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length224 ft (68.4 m)
Longest span113 ft (34.3 m)
Deck width86 ft (26.2 m)
Roadway width84 ft (25.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72,000 (2022)
Projected traffic66,550 by 2042
Trucks11%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed2.5 mi (4 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 NB over Sth 145 built?

It was built in 2006, making it 19 years old in 2025.

What condition is IH 43 NB over Sth 145 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 July 2023.

How much traffic does IH 43 NB over Sth 145 carry?

About 72,000 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is IH 43 NB over Sth 145?

The structure is 224 ft (68.4 m) long with a longest span of 113 ft (34.3 m) and a deck 86 ft wide.

Who owns IH 43 NB over Sth 145?

It is owned by the State Highway Agency.