US Bridges

IH 94 WB over Nemahbin Lake

Fair

Waukesha County, Wisconsin · 3.2 MI W JCT Sth 83 · Structure no. B67022200000000

Built
1990
35 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
31 ft
1 main span
Daily traffic
29,600
2022 count
Owner
State
State Highway Agency

About this bridge

IH 94 WB over Nemahbin Lake is a concrete slab carrying IH 94 WB over Nemahbin Lake in Waukesha County, Wisconsin. It was built in 1990, so it is 35 years old, younger 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 29,600 vehicles a day, roughly 12% of them trucks, projected to reach 35,520 by 2042. The structure is 31 ft (9.4 m) long and 60 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIH 94 WB
CrossesNemahbin Lake
Location3.2 MI W JCT Sth 83
RouteInterstate 94
CountyWaukesha County
StateWisconsin
Coordinates43.05849, -88.43174
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 US tons
Inventory rating44.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width60 ft (18.3 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,600 (2022)
Projected traffic35,520 by 2042
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 94 WB over Nemahbin Lake built?

It was built in 1990, making it 35 years old in 2025.

What condition is IH 94 WB over Nemahbin Lake 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 May 2024.

How much traffic does IH 94 WB over Nemahbin Lake carry?

About 29,600 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is IH 94 WB over Nemahbin Lake?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 60 ft wide.

Who owns IH 94 WB over Nemahbin Lake?

It is owned by the State Highway Agency.