US Bridges

IH 43 SB over Cth F

Fair

Manitowoc County, Wisconsin · 6.8M S JCT Ush 151 · Structure no. B36004000000000

Built
1977
48 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
118 ft
3 main spans
Daily traffic
11,250
2021 count
Owner
State
State Highway Agency

About this bridge

IH 43 SB over Cth F is a concrete continuous slab carrying IH 43 SB over Cth F 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 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 11,250 vehicles a day, roughly 20% of them trucks, projected to reach 23,600 by 2042. The structure is 118 ft (36 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIH 43 SB
CrossesCth F
Location6.8M S JCT Ush 151
RouteInterstate 43
CountyManitowoc County
StateWisconsin
Coordinates43.97944, -87.7337
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 US tons
Inventory rating44.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length118 ft (36 m)
Longest span58 ft (17.8 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,250 (2021)
Projected traffic23,600 by 2042
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 43 SB over Cth F built?

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

What condition is IH 43 SB over Cth F 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 over Cth F carry?

About 11,250 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is IH 43 SB over Cth F?

The structure is 118 ft (36 m) long with a longest span of 58 ft (17.8 m) and a deck 44 ft wide.

Who owns IH 43 SB over Cth F?

It is owned by the State Highway Agency.