US Bridges

Sth 100 over IH 41-USH 45

Fair

Waukesha County, Wisconsin · 1.3M E JCT Sth 175 · Structure no. B67020300000000

Built
1982
43 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
235 ft
2 main spans
Daily traffic
22,200
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 100 over IH 41-USH 45 is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 100 over IH 41-USH 45 in Waukesha County, Wisconsin. It was built in 1982, so it is 43 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 22,200 vehicles a day, roughly 3% of them trucks, projected to reach 26,640 by 2042. The structure is 235 ft (71.7 m) long and 120 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesSth 100
CrossesIH 41-USH 45
Location1.3M E JCT Sth 175
RouteState Highway 74
CountyWaukesha County
StateWisconsin
Coordinates43.17762, -88.09097
Functional classUrban Other Principal Arterial

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.8 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length235 ft (71.7 m)
Longest span118 ft (36.1 m)
Deck width120 ft (36.6 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,200 (2022)
Projected traffic26,640 by 2042
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Sth 100 over IH 41-USH 45 built?

It was built in 1982, making it 43 years old in 2025.

What condition is Sth 100 over IH 41-USH 45 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 September 2023.

How much traffic does Sth 100 over IH 41-USH 45 carry?

About 22,200 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Sth 100 over IH 41-USH 45?

The structure is 235 ft (71.7 m) long with a longest span of 118 ft (36.1 m) and a deck 120 ft wide.

Who owns Sth 100 over IH 41-USH 45?

It is owned by the State Highway Agency.