US Bridges

Sth 57 over Br Milwaukee River

Fair

Ozaukee County, Wisconsin · 1.7M N JCT IH 43 to N · Structure no. B45006700000000

Built
1974
51 years old, rebuilt 2001
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
10,500
2023 count
Owner
State
State Highway Agency

About this bridge

Sth 57 over Br Milwaukee River is a concrete continuous culvert carrying Sth 57 over Br Milwaukee River in Ozaukee County, Wisconsin. It was built in 1974 and reconstructed in 2001, so it is 51 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 10,500 vehicles a day, roughly 8% of them trucks, projected to reach 14,560 by 2043. The structure is 23 ft (7 m) long. If it were closed, the detour would be 2.5 mi (4 km).

CarriesSth 57
CrossesBr Milwaukee River
Location1.7M N JCT IH 43 to N
RouteState Highway 57
Coordinates43.41977, -87.94
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2023)
Projected traffic14,560 by 2043
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 57 over Br Milwaukee River built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2001.

What condition is Sth 57 over Br 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 August 2024.

How much traffic does Sth 57 over Br Milwaukee River carry?

About 10,500 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Sth 57 over Br Milwaukee River?

The structure is 23 ft (7 m) long with a longest span of 8 ft (2.4 m).

Who owns Sth 57 over Br Milwaukee River?

It is owned by the State Highway Agency.