US Bridges

IH39SB/IH90EB over Rock River / Ellendale R

Good

Rock County, Wisconsin · 0.4M E JCT Sth 59 to E · Structure no. B53035700000000

Built
2018
7 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
728 ft
6 main spans
Daily traffic
26,750
2022 count
Owner
State
State Highway Agency

About this bridge

IH39SB/IH90EB over Rock River / Ellendale R is a prestressed concrete continuous stringer/multi-beam or girder carrying IH39SB/IH90EB over Rock River / Ellendale R 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 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 26,750 vehicles a day, roughly 29% of them trucks, projected to reach 32,100 by 2042. The structure is 728 ft (221.9 m) long and 63 ft wide.

Location

Open in Google Maps
CarriesIH39SB/IH90EB
CrossesRock River / Ellendale R
Location0.4M E JCT Sth 59 to E
RouteInterstate 39
CountyRock County
StateWisconsin
Coordinates42.83, -89.02667
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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating38.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHL 93
Structure length728 ft (221.9 m)
Longest span128 ft (39 m)
Deck width63 ft (19.1 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,750 (2022)
Projected traffic32,100 by 2042
Trucks29%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IH39SB/IH90EB over Rock River / Ellendale R built?

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

What condition is IH39SB/IH90EB over Rock River / Ellendale R 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 September 2023.

How much traffic does IH39SB/IH90EB over Rock River / Ellendale R carry?

About 26,750 vehicles per day (2022 count), of which roughly 29% are trucks.

How long is IH39SB/IH90EB over Rock River / Ellendale R?

The structure is 728 ft (221.9 m) long with a longest span of 128 ft (39 m) and a deck 63 ft wide.

Who owns IH39SB/IH90EB over Rock River / Ellendale R?

It is owned by the State Highway Agency.