US Bridges

Sth 175 SB over IH Ramp Sth 175 NB - IH

Fair

Milwaukee County, Wisconsin · 0.2M S JCT IH 94 to W · Structure no. B40004000010000

Built
1959
66 years old, rebuilt 1998
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
161 ft
3 main spans
Daily traffic
24,650
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 175 SB over IH Ramp Sth 175 NB - IH is a steel continuous stringer/multi-beam or girder carrying Sth 175 SB over IH Ramp Sth 175 NB - IH in Milwaukee County, Wisconsin. It was built in 1959 and reconstructed in 1998, so it is 66 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 24,650 vehicles a day, roughly 2% of them trucks, projected to reach 29,580 by 2042. The structure is 161 ft (49.1 m) long and 49 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesSth 175 SB
CrossesIH Ramp Sth 175 NB - IH
Location0.2M S JCT IH 94 to W
RouteState Highway 175
CountyMilwaukee County
StateWisconsin
Coordinates43.03236, -87.97062
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating55.8 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length161 ft (49.1 m)
Longest span89 ft (27.2 m)
Deck width49 ft (14.8 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,650 (2022)
Projected traffic29,580 by 2042
Trucks2%
Lanes on structure3
Traffic directionOne-way traffic
CarriesThird level (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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$997,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sth 175 SB over IH Ramp Sth 175 NB - IH built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1998.

What condition is Sth 175 SB over IH Ramp Sth 175 NB - IH 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 Sth 175 SB over IH Ramp Sth 175 NB - IH carry?

About 24,650 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Sth 175 SB over IH Ramp Sth 175 NB - IH?

The structure is 161 ft (49.1 m) long with a longest span of 89 ft (27.2 m) and a deck 49 ft wide.

Who owns Sth 175 SB over IH Ramp Sth 175 NB - IH?

It is owned by the State Highway Agency.