US Bridges

Sth 42/MAIN ST over Ahnapee Trail

Good

Kewaunee County, Wisconsin · 0.7M N JCT Sth 29 to W · Structure no. B31001800000000

Built
1977
48 years old
Condition
Good
inspected August 2022
Type
Slab
Concrete Continuous
Length
159 ft
3 main spans
Daily traffic
5,700
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 42/MAIN ST over Ahnapee Trail is a concrete continuous slab carrying Sth 42/MAIN ST over Ahnapee Trail in Kewaunee County, Wisconsin. It was built in 1977, so it is 48 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,700 vehicles a day, roughly 6% of them trucks, projected to reach 6,800 by 2041. The structure is 159 ft (48.5 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSth 42/MAIN ST
CrossesAhnapee Trail
Location0.7M N JCT Sth 29 to W
RouteState Highway 42
Coordinates44.46881, -87.50139
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length159 ft (48.5 m)
Longest span63 ft (19.2 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,700 (2022)
Projected traffic6,800 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Sth 42/MAIN ST over Ahnapee Trail built?

It was built in 1977, making it 48 years old in 2025.

What condition is Sth 42/MAIN ST over Ahnapee Trail in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2022.

How much traffic does Sth 42/MAIN ST over Ahnapee Trail carry?

About 5,700 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Sth 42/MAIN ST over Ahnapee Trail?

The structure is 159 ft (48.5 m) long with a longest span of 63 ft (19.2 m) and a deck 47 ft wide.

Who owns Sth 42/MAIN ST over Ahnapee Trail?

It is owned by the State Highway Agency.