US Bridges

Sth 42 - Sth 57 over Sturgeon Bay

Fair

Door County, Wisconsin · 1.9M N JCT Cth S · Structure no. B15000400020000

Built
1978
47 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
161 ft
1 main span
Daily traffic
12,500
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 42 - Sth 57 over Sturgeon Bay is a steel stringer/multi-beam or girder carrying Sth 42 - Sth 57 over Sturgeon Bay in Door County, Wisconsin. It was built in 1978, so it is 47 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 12,500 vehicles a day, projected to reach 12,222 by 2042. The structure is 161 ft (49 m) long and 46 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesSth 42 - Sth 57
CrossesSturgeon Bay
Location1.9M N JCT Cth S
RouteState Highway 42
CountyDoor County
StateWisconsin
Coordinates44.82018, -87.35616
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.9 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length161 ft (49 m)
Longest span161 ft (49 m)
Deck width46 ft (14 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,500 (2021)
Projected traffic12,222 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 42 - Sth 57 over Sturgeon Bay built?

It was built in 1978, making it 47 years old in 2025.

What condition is Sth 42 - Sth 57 over Sturgeon Bay 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 April 2023.

How much traffic does Sth 42 - Sth 57 over Sturgeon Bay carry?

About 12,500 vehicles per day (2021 count).

How long is Sth 42 - Sth 57 over Sturgeon Bay?

The structure is 161 ft (49 m) long with a longest span of 161 ft (49 m) and a deck 46 ft wide.

Who owns Sth 42 - Sth 57 over Sturgeon Bay?

It is owned by the State Highway Agency.