US Bridges

IH 43 NB over Sth 147

Fair

Manitowoc County, Wisconsin · At JCT IH 43-STH 147 · Structure no. B36009400000000

Built
1977
48 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
164 ft
2 main spans
Daily traffic
11,050
2023 count
Owner
State
State Highway Agency

About this bridge

IH 43 NB over Sth 147 is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 NB over Sth 147 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 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 11,050 vehicles a day, roughly 22% of them trucks, projected to reach 18,550 by 2042. The structure is 164 ft (49.9 m) long and 43 ft wide.

CarriesIH 43 NB
CrossesSth 147
LocationAt JCT IH 43-STH 147
RouteInterstate 43
Coordinates44.27614, -87.78211
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
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 rating64.8 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length164 ft (49.9 m)
Longest span81 ft (24.7 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,050 (2023)
Projected traffic18,550 by 2042
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Sth 147 built?

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

What condition is IH 43 NB over Sth 147 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 Sth 147 carry?

About 11,050 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is IH 43 NB over Sth 147?

The structure is 164 ft (49.9 m) long with a longest span of 81 ft (24.7 m) and a deck 43 ft wide.

Who owns IH 43 NB over Sth 147?

It is owned by the State Highway Agency.