US Bridges

IH 43 NB over Ush 12

Fair

Walworth County, Wisconsin · 1.9M N JCT Sth 67 to N · Structure no. B64006400000000

Built
1969
56 years old, rebuilt 2020
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
341 ft
4 main spans
Daily traffic
11,850
2022 count
Owner
State
State Highway Agency

About this bridge

IH 43 NB over Ush 12 is a steel continuous stringer/multi-beam or girder carrying IH 43 NB over Ush 12 in Walworth County, Wisconsin. It was built in 1969 and reconstructed in 2020, so it is 56 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 11,850 vehicles a day, roughly 12% of them trucks, projected to reach 14,220 by 2042. The structure is 341 ft (103.8 m) long and 54 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesIH 43 NB
CrossesUsh 12
Location1.9M N JCT Sth 67 to N
RouteInterstate 43
CountyWalworth County
StateWisconsin
Coordinates42.67388, -88.52205
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
Deck8 Very GoodNo problems noted.
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 inspectionApril 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length341 ft (103.8 m)
Longest span91 ft (27.7 m)
Deck width54 ft (16.5 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,850 (2022)
Projected traffic14,220 by 2042
Trucks12%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 Ush 12 built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2020.

What condition is IH 43 NB over Ush 12 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 April 2023.

How much traffic does IH 43 NB over Ush 12 carry?

About 11,850 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is IH 43 NB over Ush 12?

The structure is 341 ft (103.8 m) long with a longest span of 91 ft (27.7 m) and a deck 54 ft wide.

Who owns IH 43 NB over Ush 12?

It is owned by the State Highway Agency.