US Bridges

IH Sth 78/IH 39 over IH 90/94

Fair

Columbia County, Wisconsin · 8.1M N JCT Cth Dl · Structure no. B11010200000000

Built
1994
31 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
344 ft
4 main spans
Daily traffic
10,000
2021 count
Owner
State
State Highway Agency

About this bridge

IH Sth 78/IH 39 over IH 90/94 is a prestressed concrete continuous stringer/multi-beam or girder carrying IH Sth 78/IH 39 over IH 90/94 in Columbia County, Wisconsin. It was built in 1994, so it is 31 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 10,000 vehicles a day, projected to reach 12,000 by 2041. The structure is 344 ft (104.9 m) long and 72 ft wide.

Location

Open in Google Maps
CarriesIH Sth 78/IH 39
CrossesIH 90/94
Location8.1M N JCT Cth Dl
RouteInterstate 39
CountyColumbia County
StateWisconsin
Coordinates43.48758, -89.49384
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length344 ft (104.9 m)
Longest span90 ft (27.4 m)
Deck width72 ft (21.9 m)
Roadway width67 ft (20.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2021)
Projected traffic12,000 by 2041
Trucks0%
Lanes on structure3
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 Sth 78/IH 39 over IH 90/94 built?

It was built in 1994, making it 31 years old in 2025.

What condition is IH Sth 78/IH 39 over IH 90/94 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does IH Sth 78/IH 39 over IH 90/94 carry?

About 10,000 vehicles per day (2021 count).

How long is IH Sth 78/IH 39 over IH 90/94?

The structure is 344 ft (104.9 m) long with a longest span of 90 ft (27.4 m) and a deck 72 ft wide.

Who owns IH Sth 78/IH 39 over IH 90/94?

It is owned by the State Highway Agency.