US Bridges

IH Ramp I 43 Nb-Si over IH Ramp to IH 43 NB

Fair

Milwaukee County, Wisconsin · 1.97 MI N JCT Sth 190 · Structure no. B40058700000000

Built
1992
33 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
121 ft
1 main span
Daily traffic
4,000
2022 count
Owner
State
State Highway Agency

About this bridge

IH Ramp I 43 Nb-Si over IH Ramp to IH 43 NB is a steel stringer/multi-beam or girder carrying IH Ramp I 43 Nb-Si over IH Ramp to IH 43 NB in Milwaukee County, Wisconsin. It was built in 1992, so it is 33 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 4,000 vehicles a day, roughly 1% of them trucks, projected to reach 72,325 by 2042. The structure is 121 ft (37 m) long and 29 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIH Ramp I 43 Nb-Si
CrossesIH Ramp to IH 43 NB
Location1.97 MI N JCT Sth 190
RouteInterstate 43
CountyMilwaukee County
StateWisconsin
Coordinates43.11696, -87.91813
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
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 geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length121 ft (37 m)
Longest span119 ft (36.3 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2022)
Projected traffic72,325 by 2042
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 Ramp I 43 Nb-Si over IH Ramp to IH 43 NB built?

It was built in 1992, making it 33 years old in 2025.

What condition is IH Ramp I 43 Nb-Si over IH Ramp to IH 43 NB 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 March 2023.

How much traffic does IH Ramp I 43 Nb-Si over IH Ramp to IH 43 NB carry?

About 4,000 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is IH Ramp I 43 Nb-Si over IH Ramp to IH 43 NB?

The structure is 121 ft (37 m) long with a longest span of 119 ft (36.3 m) and a deck 29 ft wide.

Who owns IH Ramp I 43 Nb-Si over IH Ramp to IH 43 NB?

It is owned by the State Highway Agency.