US Bridges

IH 39 SB to IH 43 over IH 39 NB & SB / IH 90 WB

Good

Rock County, Wisconsin · IH 43 / IH 39 / IH 90 Int · Structure no. B53030500000000

Built
2021
4 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
574 ft
4 main spans
Daily traffic
1,250
2022 count
Owner
State
State Highway Agency

About this bridge

IH 39 SB to IH 43 over IH 39 NB & SB / IH 90 WB is a steel continuous stringer/multi-beam or girder carrying IH 39 SB to IH 43 over IH 39 NB & SB / IH 90 WB in Rock County, Wisconsin. It was built in 2021, so it is 4 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,250 vehicles a day, projected to reach 1,450 by 2040. The structure is 574 ft (175 m) long and 30 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesIH 39 SB to IH 43
CrossesIH 39 NB & SB / IH 90 WB
LocationIH 43 / IH 39 / IH 90 Int
RouteInterstate 39
CountyRock County
StateWisconsin
Coordinates42.53222, -88.97528
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating45.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length574 ft (175 m)
Longest span165 ft (50.3 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,250 (2022)
Projected traffic1,450 by 2040
Trucks0%
Lanes on structure1
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 39 SB to IH 43 over IH 39 NB & SB / IH 90 WB built?

It was built in 2021, making it 4 years old in 2025.

What condition is IH 39 SB to IH 43 over IH 39 NB & SB / IH 90 WB in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does IH 39 SB to IH 43 over IH 39 NB & SB / IH 90 WB carry?

About 1,250 vehicles per day (2022 count).

How long is IH 39 SB to IH 43 over IH 39 NB & SB / IH 90 WB?

The structure is 574 ft (175 m) long with a longest span of 165 ft (50.3 m) and a deck 30 ft wide.

Who owns IH 39 SB to IH 43 over IH 39 NB & SB / IH 90 WB?

It is owned by the State Highway Agency.