US Bridges

IH-43 NB over Lrd Cth V|e Mason ST

Fair

Brown County, Wisconsin · 5.6M N JCT Ush 141 to N · Structure no. B05020300000000

Built
1981
44 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
180 ft
2 main spans
Daily traffic
18,350
2022 count
Owner
State
State Highway Agency

About this bridge

IH-43 NB over Lrd Cth V|e Mason ST is a steel continuous stringer/multi-beam or girder carrying IH-43 NB over Lrd Cth V|e Mason ST in Brown County, Wisconsin. It was built in 1981, so it is 44 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 18,350 vehicles a day, roughly 22% of them trucks, projected to reach 20,919 by 2043. The structure is 180 ft (54.8 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesIH-43 NB
CrossesLrd Cth V|e Mason ST
Location5.6M N JCT Ush 141 to N
RouteInterstate 43
CountyBrown County
StateWisconsin
Coordinates44.48702, -87.94023
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 48 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 rating62.8 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length180 ft (54.8 m)
Longest span90 ft (27.3 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,350 (2022)
Projected traffic20,919 by 2043
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 Lrd Cth V|e Mason ST built?

It was built in 1981, making it 44 years old in 2025.

What condition is IH-43 NB over Lrd Cth V|e Mason 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 May 2024.

How much traffic does IH-43 NB over Lrd Cth V|e Mason ST carry?

About 18,350 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is IH-43 NB over Lrd Cth V|e Mason ST?

The structure is 180 ft (54.8 m) long with a longest span of 90 ft (27.3 m) and a deck 43 ft wide.

Who owns IH-43 NB over Lrd Cth V|e Mason ST?

It is owned by the State Highway Agency.