US Bridges

IH 41/USH 45 Sb-Zo over Sth 100 Sb-Silver Spring

Fair

Milwaukee County, Wisconsin · 0.2 MI S JCT Sth 100 · Structure no. B40036300000000

Built
1967
58 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
160 ft
2 main spans
Daily traffic
53,500
2022 count
Owner
State
State Highway Agency

About this bridge

IH 41/USH 45 Sb-Zo over Sth 100 Sb-Silver Spring is a steel continuous stringer/multi-beam or girder carrying IH 41/USH 45 Sb-Zo over Sth 100 Sb-Silver Spring in Milwaukee County, Wisconsin. It was built in 1967, so it is 58 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 53,500 vehicles a day, roughly 3% of them trucks, projected to reach 64,200 by 2042. The structure is 160 ft (48.8 m) long and 58 ft wide.

CarriesIH 41/USH 45 Sb-Zo
CrossesSth 100 Sb-Silver Spring
Location0.2 MI S JCT Sth 100
RouteInterstate 41
Coordinates43.1173, -88.05762
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.
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 inspectionMarch 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.8 US tons
Inventory rating32.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span78 ft (23.8 m)
Deck width58 ft (17.7 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53,500 (2022)
Projected traffic64,200 by 2042
Trucks3%
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 41/USH 45 Sb-Zo over Sth 100 Sb-Silver Spring built?

It was built in 1967, making it 58 years old in 2025.

What condition is IH 41/USH 45 Sb-Zo over Sth 100 Sb-Silver Spring 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 2024.

How much traffic does IH 41/USH 45 Sb-Zo over Sth 100 Sb-Silver Spring carry?

About 53,500 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is IH 41/USH 45 Sb-Zo over Sth 100 Sb-Silver Spring?

The structure is 160 ft (48.8 m) long with a longest span of 78 ft (23.8 m) and a deck 58 ft wide.

Who owns IH 41/USH 45 Sb-Zo over Sth 100 Sb-Silver Spring?

It is owned by the State Highway Agency.