US Bridges

IH 43 NB over Cp Railroad and Spring B

Good

Rock County, Wisconsin · 0.5 MI S JCT Sth 81 · Structure no. B53030800000000

Built
2020
5 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
242 ft
2 main spans
Daily traffic
8,350
2022 count
Owner
State
State Highway Agency

About this bridge

IH 43 NB over Cp Railroad and Spring B is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 NB over Cp Railroad and Spring B in Rock County, Wisconsin. It was built in 2020, so it is 5 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 8,350 vehicles a day, roughly 19% of them trucks, projected to reach 9,450 by 2044. The structure is 242 ft (73.9 m) long and 36 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesIH 43 NB
CrossesCp Railroad and Spring B
Location0.5 MI S JCT Sth 81
RouteInterstate 43
CountyRock County
StateWisconsin
Coordinates42.52064, -88.97475
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.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.8 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length242 ft (73.9 m)
Longest span118 ft (36.1 m)
Deck width36 ft (10.9 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,350 (2022)
Projected traffic9,450 by 2044
Trucks19%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 43 NB over Cp Railroad and Spring B built?

It was built in 2020, making it 5 years old in 2025.

What condition is IH 43 NB over Cp Railroad and Spring B 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 January 2025.

How much traffic does IH 43 NB over Cp Railroad and Spring B carry?

About 8,350 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is IH 43 NB over Cp Railroad and Spring B?

The structure is 242 ft (73.9 m) long with a longest span of 118 ft (36.1 m) and a deck 36 ft wide.

Who owns IH 43 NB over Cp Railroad and Spring B?

It is owned by the State Highway Agency.