US Bridges

IH 43 NB over Lrd Irwin Ave

Fair

Brown County, Wisconsin · 1.8M N JCT Sth 54 to W · Structure no. B05022200000000

Built
1978
47 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
122 ft
1 main span
Daily traffic
19,750
2022 count
Owner
State
State Highway Agency

About this bridge

IH 43 NB over Lrd Irwin Ave is a steel stringer/multi-beam or girder carrying IH 43 NB over Lrd Irwin Ave in Brown County, Wisconsin. It was built in 1978, so it is 47 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 19,750 vehicles a day, roughly 22% of them trucks, projected to reach 53,900 by 2043. The structure is 122 ft (37.1 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesIH 43 NB
CrossesLrd Irwin Ave
Location1.8M N JCT Sth 54 to W
RouteInterstate 43
CountyBrown County
StateWisconsin
Coordinates44.52584, -87.98499
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 inspectionMay 2024
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 rating70.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length122 ft (37.1 m)
Longest span120 ft (36.6 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,750 (2022)
Projected traffic53,900 by 2043
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 NB over Lrd Irwin Ave built?

It was built in 1978, making it 47 years old in 2025.

What condition is IH 43 NB over Lrd Irwin Ave 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 Irwin Ave carry?

About 19,750 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is IH 43 NB over Lrd Irwin Ave?

The structure is 122 ft (37.1 m) long with a longest span of 120 ft (36.6 m) and a deck 44 ft wide.

Who owns IH 43 NB over Lrd Irwin Ave?

It is owned by the State Highway Agency.