US Bridges

IH 39 NB / IH 90 W over Cnw/Up RR

Good

Rock County, Wisconsin · 4.4M W JCT Cth S to E · Structure no. B53032200000000

Built
2018
7 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
262 ft
3 main spans
Daily traffic
32,550
2022 count
Owner
State
State Highway Agency

About this bridge

IH 39 NB / IH 90 W over Cnw/Up RR is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 39 NB / IH 90 W over Cnw/Up RR in Rock County, Wisconsin. It was built in 2018, so it is 7 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 32,550 vehicles a day, roughly 38% of them trucks, projected to reach 47,150 by 2040. The structure is 262 ft (80 m) long and 63 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesIH 39 NB / IH 90 W
CrossesCnw/Up RR
Location4.4M W JCT Cth S to E
RouteInterstate 39
CountyRock County
StateWisconsin
Coordinates42.62278, -88.9825
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length262 ft (80 m)
Longest span112 ft (34.1 m)
Deck width63 ft (19.1 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,550 (2022)
Projected traffic47,150 by 2040
Trucks38%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 NB / IH 90 W over Cnw/Up RR built?

It was built in 2018, making it 7 years old in 2025.

What condition is IH 39 NB / IH 90 W over Cnw/Up RR 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 November 2024.

How much traffic does IH 39 NB / IH 90 W over Cnw/Up RR carry?

About 32,550 vehicles per day (2022 count), of which roughly 38% are trucks.

How long is IH 39 NB / IH 90 W over Cnw/Up RR?

The structure is 262 ft (80 m) long with a longest span of 112 ft (34.1 m) and a deck 63 ft wide.

Who owns IH 39 NB / IH 90 W over Cnw/Up RR?

It is owned by the State Highway Agency.