US Bridges

Lrd Humboldt RD over IH 43

Fair

Brown County, Wisconsin · 0.7M S JCT Sth 54 · Structure no. B05020700000000

Built
1978
47 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
379 ft
2 main spans
Daily traffic
3,500
2022 count
Owner
State
State Highway Agency

About this bridge

Lrd Humboldt RD over IH 43 is a steel continuous stringer/multi-beam or girder carrying Lrd Humboldt RD over IH 43 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 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 3,500 vehicles a day, projected to reach 4,800 by 2043. The structure is 379 ft (115.5 m) long and 60 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesLrd Humboldt RD
CrossesIH 43
Location0.7M S JCT Sth 54
RouteCity Street 0
CountyBrown County
StateWisconsin
Coordinates44.51123, -87.94314
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.1 US tons
Inventory rating46.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length379 ft (115.5 m)
Longest span186 ft (56.8 m)
Deck width60 ft (18.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2022)
Projected traffic4,800 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

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 Lrd Humboldt RD over IH 43 built?

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

What condition is Lrd Humboldt RD over IH 43 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 Lrd Humboldt RD over IH 43 carry?

About 3,500 vehicles per day (2022 count).

How long is Lrd Humboldt RD over IH 43?

The structure is 379 ft (115.5 m) long with a longest span of 186 ft (56.8 m) and a deck 60 ft wide.

Who owns Lrd Humboldt RD over IH 43?

It is owned by the State Highway Agency.