US Bridges

IH 39SB/90 EB over Cth T

Fair

Dane County, Wisconsin · 0.1M E JCT IH 94 to E · Structure no. B13044800000000

Built
1997
28 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
154 ft
3 main spans
Daily traffic
54,500
2022 count
Owner
State
State Highway Agency

About this bridge

IH 39SB/90 EB over Cth T is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 39SB/90 EB over Cth T in Dane County, Wisconsin. It was built in 1997, so it is 28 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 6 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 54,500 vehicles a day, roughly 10% of them trucks, projected to reach 65,400 by 2042. The structure is 154 ft (46.8 m) long and 94 ft wide.

CarriesIH 39SB/90 EB
CrossesCth T
Location0.1M E JCT IH 94 to E
RouteInterstate 90
Coordinates43.10685, -89.28576
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.9 US tons
Inventory rating44.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length154 ft (46.8 m)
Longest span87 ft (26.5 m)
Deck width94 ft (28.8 m)
Roadway width92 ft (27.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,500 (2022)
Projected traffic65,400 by 2042
Trucks10%
Lanes on structure4
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 39SB/90 EB over Cth T built?

It was built in 1997, making it 28 years old in 2025.

What condition is IH 39SB/90 EB over Cth T 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 May 2024.

How much traffic does IH 39SB/90 EB over Cth T carry?

About 54,500 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is IH 39SB/90 EB over Cth T?

The structure is 154 ft (46.8 m) long with a longest span of 87 ft (26.5 m) and a deck 94 ft wide.

Who owns IH 39SB/90 EB over Cth T?

It is owned by the State Highway Agency.