US Bridges

IH 43 Sb-Ush 45 SB over Sth 100 - S 108th ST

Fair

Milwaukee County, Wisconsin · 0.8 MI S JCT IH 894 · Structure no. B40030300000000

Built
1965
60 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
173 ft
4 main spans
Daily traffic
38,250
2021 count
Owner
State
State Highway Agency

About this bridge

IH 43 Sb-Ush 45 SB over Sth 100 - S 108th ST is a concrete continuous slab carrying IH 43 Sb-Ush 45 SB over Sth 100 - S 108th ST in Milwaukee County, Wisconsin. It was built in 1965, so it is 60 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 38,250 vehicles a day, roughly 1% of them trucks, projected to reach 45,900 by 2041. The structure is 173 ft (52.8 m) long and 71 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIH 43 Sb-Ush 45 SB
CrossesSth 100 - S 108th ST
Location0.8 MI S JCT IH 894
RouteInterstate 43
Coordinates42.95717, -88.04769
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.
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 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length173 ft (52.8 m)
Longest span57 ft (17.5 m)
Deck width71 ft (21.6 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,250 (2021)
Projected traffic45,900 by 2041
Trucks1%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
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 43 Sb-Ush 45 SB over Sth 100 - S 108th ST built?

It was built in 1965, making it 60 years old in 2025.

What condition is IH 43 Sb-Ush 45 SB over Sth 100 - S 108th ST 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 IH 43 Sb-Ush 45 SB over Sth 100 - S 108th ST carry?

About 38,250 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is IH 43 Sb-Ush 45 SB over Sth 100 - S 108th ST?

The structure is 173 ft (52.8 m) long with a longest span of 57 ft (17.5 m) and a deck 71 ft wide.

Who owns IH 43 Sb-Ush 45 SB over Sth 100 - S 108th ST?

It is owned by the State Highway Agency.