US Bridges

IH 39 SB/90 EB over Cmstpp RR / Spring Brook

Good

Rock County, Wisconsin · 0.6M E JCT IH 43 to S · Structure no. B53030000000000

Built
2021
4 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
238 ft
2 main spans
Daily traffic
29,550
2022 count
Owner
State
State Highway Agency

About this bridge

IH 39 SB/90 EB over Cmstpp RR / Spring Brook is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 39 SB/90 EB over Cmstpp RR / Spring Brook 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 29,550 vehicles a day, roughly 14% of them trucks, projected to reach 38,550 by 2040. The structure is 238 ft (72.5 m) long and 88 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesIH 39 SB/90 EB
CrossesCmstpp RR / Spring Brook
Location0.6M E JCT IH 43 to S
RouteInterstate 39
CountyRock County
StateWisconsin
Coordinates42.52056, -88.97556
Functional classUrban 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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length238 ft (72.5 m)
Longest span116 ft (35.4 m)
Deck width88 ft (26.8 m)
Roadway width85 ft (26 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,550 (2022)
Projected traffic38,550 by 2040
Trucks14%
Lanes on structure5
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 39 SB/90 EB over Cmstpp RR / Spring Brook built?

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

What condition is IH 39 SB/90 EB over Cmstpp RR / Spring Brook 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 May 2023.

How much traffic does IH 39 SB/90 EB over Cmstpp RR / Spring Brook carry?

About 29,550 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is IH 39 SB/90 EB over Cmstpp RR / Spring Brook?

The structure is 238 ft (72.5 m) long with a longest span of 116 ft (35.4 m) and a deck 88 ft wide.

Who owns IH 39 SB/90 EB over Cmstpp RR / Spring Brook?

It is owned by the State Highway Agency.