US Bridges

IH 43 NB over Devils River

Fair

Manitowoc County, Wisconsin · 1.7M N JCT Sth 147 · Structure no. B36009800000000

Built
1979
46 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
116 ft
1 main span
Daily traffic
9,600
2023 count
Owner
State
State Highway Agency

About this bridge

IH 43 NB over Devils River is a prestressed concrete stringer/multi-beam or girder carrying IH 43 NB over Devils River 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 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 9,600 vehicles a day, roughly 22% of them trucks, projected to reach 11,800 by 2042. The structure is 116 ft (35.4 m) long and 43 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesIH 43 NB
CrossesDevils River
Location1.7M N JCT Sth 147
RouteInterstate 43
CountyManitowoc County
StateWisconsin
Coordinates44.29952, -87.78249
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.5 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length116 ft (35.4 m)
Longest span115 ft (35.2 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,600 (2023)
Projected traffic11,800 by 2042
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 43 NB over Devils River built?

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

What condition is IH 43 NB over Devils River 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 NB over Devils River carry?

About 9,600 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is IH 43 NB over Devils River?

The structure is 116 ft (35.4 m) long with a longest span of 115 ft (35.2 m) and a deck 43 ft wide.

Who owns IH 43 NB over Devils River?

It is owned by the State Highway Agency.