US Bridges

IH 43 SB over Cth X / Hart RD

Fair

Rock County, Wisconsin · 5.3M S JCT Sth 140 to S · Structure no. B53010600000000

Built
1976
49 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
180 ft
2 main spans
Daily traffic
8,700
2022 count
Owner
State
State Highway Agency

About this bridge

IH 43 SB over Cth X / Hart RD is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 SB over Cth X / Hart RD in Rock County, Wisconsin. It was built in 1976, so it is 49 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 8,700 vehicles a day, roughly 19% of them trucks, projected to reach 10,440 by 2043. The structure is 180 ft (54.8 m) long and 43 ft wide.

CarriesIH 43 SB
CrossesCth X / Hart RD
Location5.3M S JCT Sth 140 to S
RouteInterstate 43
Coordinates42.54079, -88.94866
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 inspectionMarch 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 rating91.8 US tons
Inventory rating42.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length180 ft (54.8 m)
Longest span88 ft (26.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,700 (2022)
Projected traffic10,440 by 2043
Trucks19%
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 SB over Cth X / Hart RD built?

It was built in 1976, making it 49 years old in 2025.

What condition is IH 43 SB over Cth X / Hart RD 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 IH 43 SB over Cth X / Hart RD carry?

About 8,700 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is IH 43 SB over Cth X / Hart RD?

The structure is 180 ft (54.8 m) long with a longest span of 88 ft (26.8 m) and a deck 43 ft wide.

Who owns IH 43 SB over Cth X / Hart RD?

It is owned by the State Highway Agency.