US Bridges

IH 39 NB / IH 90 W over Lrd Siggelkow RD

Good

Dane County, Wisconsin · 3.5MI. W of Cth N to E · Structure no. B13072800000000

Built
2020
5 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
232 ft
2 main spans
Daily traffic
30,200
2022 count
Owner
State
State Highway Agency

About this bridge

IH 39 NB / IH 90 W over Lrd Siggelkow RD is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 39 NB / IH 90 W over Lrd Siggelkow RD in Dane County, Wisconsin. It was built in 2020, so it is 5 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 30,200 vehicles a day, roughly 29% of them trucks, projected to reach 36,000 by 2040. The structure is 232 ft (70.7 m) long and 63 ft wide.

Location

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CarriesIH 39 NB / IH 90 W
CrossesLrd Siggelkow RD
Location3.5MI. W of Cth N to E
RouteInterstate 39
CountyDane County
StateWisconsin
Coordinates43.02682, -89.2551
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length232 ft (70.7 m)
Longest span116 ft (35.4 m)
Deck width63 ft (19.1 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,200 (2022)
Projected traffic36,000 by 2040
Trucks29%
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 39 NB / IH 90 W over Lrd Siggelkow RD built?

It was built in 2020, making it 5 years old in 2025.

What condition is IH 39 NB / IH 90 W over Lrd Siggelkow RD 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 October 2024.

How much traffic does IH 39 NB / IH 90 W over Lrd Siggelkow RD carry?

About 30,200 vehicles per day (2022 count), of which roughly 29% are trucks.

How long is IH 39 NB / IH 90 W over Lrd Siggelkow RD?

The structure is 232 ft (70.7 m) long with a longest span of 116 ft (35.4 m) and a deck 63 ft wide.

Who owns IH 39 NB / IH 90 W over Lrd Siggelkow RD?

It is owned by the State Highway Agency.