US Bridges

IH 43 NB over Cnw RR

Fair

Ozaukee County, Wisconsin · 3.7 MI N JCT Sth 33 · Structure no. B45004400000000

Built
1974
51 years old, rebuilt 2012
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
294 ft
3 main spans
Daily traffic
14,950
2023 count
Owner
State
State Highway Agency

About this bridge

IH 43 NB over Cnw RR is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 NB over Cnw RR in Ozaukee County, Wisconsin. It was built in 1974 and reconstructed in 2012, so it is 51 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 14,950 vehicles a day, roughly 14% of them trucks, projected to reach 23,870 by 2043. The structure is 294 ft (89.7 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIH 43 NB
CrossesCnw RR
Location3.7 MI N JCT Sth 33
RouteInterstate 43
Coordinates43.41144, -87.88083
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating42.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length294 ft (89.7 m)
Longest span105 ft (32 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,950 (2023)
Projected traffic23,870 by 2043
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
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 NB over Cnw RR built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2012.

What condition is IH 43 NB over Cnw 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 August 2024.

How much traffic does IH 43 NB over Cnw RR carry?

About 14,950 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is IH 43 NB over Cnw RR?

The structure is 294 ft (89.7 m) long with a longest span of 105 ft (32 m) and a deck 44 ft wide.

Who owns IH 43 NB over Cnw RR?

It is owned by the State Highway Agency.