US Bridges

IH Ramp Mineral S over Sth 59/NATIONAL Ave

Fair

Milwaukee County, Wisconsin · 1.5 MI N JCT Sth 38 · Structure no. B400285023B0000

Built
1968
57 years old, rebuilt 1987
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
260 ft
5 main spans
Daily traffic
4,600
2022 count
Owner
State
State Highway Agency

About this bridge

IH Ramp Mineral S over Sth 59/NATIONAL Ave is a steel continuous stringer/multi-beam or girder carrying IH Ramp Mineral S over Sth 59/NATIONAL Ave in Milwaukee County, Wisconsin. It was built in 1968 and reconstructed in 1987, so it is 57 years old, older 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 4,600 vehicles a day, roughly 1% of them trucks, projected to reach 6,500 by 2043. The structure is 260 ft (79.2 m) long and 24 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIH Ramp Mineral S
CrossesSth 59/NATIONAL Ave
Location1.5 MI N JCT Sth 38
RouteInterstate 43
Coordinates43.02298, -87.92055
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.2 US tons
Inventory rating41.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length260 ft (79.2 m)
Longest span89 ft (27 m)
Deck width24 ft (7.2 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,600 (2022)
Projected traffic6,500 by 2043
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
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 Mineral S over Sth 59/NATIONAL Ave built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1987.

What condition is IH Ramp Mineral S over Sth 59/NATIONAL Ave 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 August 2024.

How much traffic does IH Ramp Mineral S over Sth 59/NATIONAL Ave carry?

About 4,600 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is IH Ramp Mineral S over Sth 59/NATIONAL Ave?

The structure is 260 ft (79.2 m) long with a longest span of 89 ft (27 m) and a deck 24 ft wide.

Who owns IH Ramp Mineral S over Sth 59/NATIONAL Ave?

It is owned by the State Highway Agency.