US Bridges

IH 39 over Ramp Sth 78N-IH 90 94 W

Good

Columbia County, Wisconsin · 0.2M S JCT Sth 78 to S · Structure no. B11010000000000

Built
1993
32 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
135 ft
3 main spans
Daily traffic
10,300
2021 count
Owner
State
State Highway Agency

About this bridge

IH 39 over Ramp Sth 78N-IH 90 94 W is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 39 over Ramp Sth 78N-IH 90 94 W in Columbia County, Wisconsin. It was built in 1993, so it is 32 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 10,300 vehicles a day, roughly 23% of them trucks, projected to reach 12,360 by 2041. The structure is 135 ft (41.2 m) long and 43 ft wide.

CarriesIH 39
CrossesRamp Sth 78N-IH 90 94 W
Location0.2M S JCT Sth 78 to S
RouteInterstate 39
Coordinates43.49106, -89.49311
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 inspectionJune 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 rating64.8 US tons
Inventory rating48.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length135 ft (41.2 m)
Longest span56 ft (17.2 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,300 (2021)
Projected traffic12,360 by 2041
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 39 over Ramp Sth 78N-IH 90 94 W built?

It was built in 1993, making it 32 years old in 2025.

What condition is IH 39 over Ramp Sth 78N-IH 90 94 W 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 June 2024.

How much traffic does IH 39 over Ramp Sth 78N-IH 90 94 W carry?

About 10,300 vehicles per day (2021 count), of which roughly 23% are trucks.

How long is IH 39 over Ramp Sth 78N-IH 90 94 W?

The structure is 135 ft (41.2 m) long with a longest span of 56 ft (17.2 m) and a deck 43 ft wide.

Who owns IH 39 over Ramp Sth 78N-IH 90 94 W?

It is owned by the State Highway Agency.