US Bridges

IH 43 NB over Cth K

Good

Manitowoc County, Wisconsin · 5.2M N JCT Ush 10 to W · Structure no. B36008700000000

Built
1977
48 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
215 ft
2 main spans
Daily traffic
10,000
2023 count
Owner
State
State Highway Agency

About this bridge

IH 43 NB over Cth K is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 NB over Cth K in Manitowoc County, Wisconsin. It was built in 1977, so it is 48 years old, older 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 10,000 vehicles a day, roughly 22% of them trucks, projected to reach 17,750 by 2042. The structure is 215 ft (65.6 m) long and 43 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

CarriesIH 43 NB
CrossesCth K
Location5.2M N JCT Ush 10 to W
RouteInterstate 43
Coordinates44.22544, -87.7663
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 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 rating68.5 US tons
Inventory rating32.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length215 ft (65.6 m)
Longest span105 ft (32 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2023)
Projected traffic17,750 by 2042
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed34.8 mi (56 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 Cth K built?

It was built in 1977, making it 48 years old in 2025.

What condition is IH 43 NB over Cth K 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 August 2023.

How much traffic does IH 43 NB over Cth K carry?

About 10,000 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is IH 43 NB over Cth K?

The structure is 215 ft (65.6 m) long with a longest span of 105 ft (32 m) and a deck 43 ft wide.

Who owns IH 43 NB over Cth K?

It is owned by the State Highway Agency.