US Bridges

Sth 33 over Milwaukee River

Fair

Washington County, Wisconsin · 0.2 MI E JCT Cth M · Structure no. B66009300000000

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
146 ft
2 main spans
Daily traffic
7,600
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 33 over Milwaukee River is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 33 over Milwaukee River in Washington County, Wisconsin. It was built in 1981, so it is 44 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 6 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 7,600 vehicles a day, roughly 8% of them trucks, projected to reach 11,730 by 2043. The structure is 146 ft (44.4 m) long and 43 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

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CarriesSth 33
CrossesMilwaukee River
Location0.2 MI E JCT Cth M
RouteState Highway 33
CountyWashington County
StateWisconsin
Coordinates43.42494, -88.07773
Functional classRural Principal Arterial - Other

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.
Superstructure9 ExcellentNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.2 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length146 ft (44.4 m)
Longest span73 ft (22.1 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,600 (2022)
Projected traffic11,730 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed12.4 mi (20 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 33 over Milwaukee River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Sth 33 over Milwaukee River 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 2024.

How much traffic does Sth 33 over Milwaukee River carry?

About 7,600 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Sth 33 over Milwaukee River?

The structure is 146 ft (44.4 m) long with a longest span of 73 ft (22.1 m) and a deck 43 ft wide.

Who owns Sth 33 over Milwaukee River?

It is owned by the State Highway Agency.