US Bridges

IH 43 Sb-Sth 42 SB over Cth Cs W Custer ST

Fair

Manitowoc County, Wisconsin · 1.6M S JCT Sth 42 to N · Structure no. B36006500000000

Built
1979
46 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
154 ft
3 main spans
Daily traffic
11,450
2023 count
Owner
State
State Highway Agency

About this bridge

IH 43 Sb-Sth 42 SB over Cth Cs W Custer ST is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 Sb-Sth 42 SB over Cth Cs W Custer ST in Manitowoc 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 11,450 vehicles a day, roughly 22% of them trucks, projected to reach 11,001 by 2042. The structure is 154 ft (47 m) long and 43 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesIH 43 Sb-Sth 42 SB
CrossesCth Cs W Custer ST
Location1.6M S JCT Sth 42 to N
RouteInterstate 43
Coordinates44.08458, -87.72362
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 rating55.8 US tons
Inventory rating32.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length154 ft (47 m)
Longest span79 ft (24.1 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,450 (2023)
Projected traffic11,001 by 2042
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed14.9 mi (24 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-Sth 42 SB over Cth Cs W Custer ST built?

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

What condition is IH 43 Sb-Sth 42 SB over Cth Cs W Custer ST 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 2023.

How much traffic does IH 43 Sb-Sth 42 SB over Cth Cs W Custer ST carry?

About 11,450 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is IH 43 Sb-Sth 42 SB over Cth Cs W Custer ST?

The structure is 154 ft (47 m) long with a longest span of 79 ft (24.1 m) and a deck 43 ft wide.

Who owns IH 43 Sb-Sth 42 SB over Cth Cs W Custer ST?

It is owned by the State Highway Agency.