US Bridges

Sth 172 WB over IH 43

Fair

Brown County, Wisconsin · 0.5M W JCT IH 43 to N · Structure no. B05019000000000

Built
1980
45 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
422 ft
4 main spans
Daily traffic
11,000
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 172 WB over IH 43 is a steel continuous stringer/multi-beam or girder carrying Sth 172 WB over IH 43 in Brown County, Wisconsin. It was built in 1980, so it is 45 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 11,000 vehicles a day, roughly 12% of them trucks, projected to reach 12,400 by 2043. The structure is 422 ft (128.7 m) long and 43 ft wide.

CarriesSth 172 WB
CrossesIH 43
Location0.5M W JCT IH 43 to N
RouteState Highway 172
Coordinates44.45282, -87.96055
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionMarch 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 rating68.5 US tons
Inventory rating41.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length422 ft (128.7 m)
Longest span169 ft (51.4 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2022)
Projected traffic12,400 by 2043
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 Sth 172 WB over IH 43 built?

It was built in 1980, making it 45 years old in 2025.

What condition is Sth 172 WB 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 March 2024.

How much traffic does Sth 172 WB over IH 43 carry?

About 11,000 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Sth 172 WB over IH 43?

The structure is 422 ft (128.7 m) long with a longest span of 169 ft (51.4 m) and a deck 43 ft wide.

Who owns Sth 172 WB over IH 43?

It is owned by the State Highway Agency.