US Bridges

Sth 47 over Minocqua Lake

Fair

Oneida County, Wisconsin · 6.2M N JCT Cth D to W · Structure no. B43003700000000

Built
1988
37 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
67 ft
3 main spans
Daily traffic
5,700
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 47 over Minocqua Lake is a concrete continuous slab carrying Sth 47 over Minocqua Lake in Oneida County, Wisconsin. It was built in 1988, so it is 37 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 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 5,700 vehicles a day, roughly 5% of them trucks, projected to reach 6,840 by 2042. The structure is 67 ft (20.4 m) long and 46 ft wide. If it were closed, the detour would be 69 mi (111 km).

Location

Open in Google Maps
CarriesSth 47
CrossesMinocqua Lake
Location6.2M N JCT Cth D to W
RouteState Highway 47
CountyOneida County
StateWisconsin
Coordinates45.87378, -89.66426
Functional classRural Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span25 ft (7.6 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,700 (2022)
Projected traffic6,840 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed69 mi (111 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 47 over Minocqua Lake built?

It was built in 1988, making it 37 years old in 2025.

What condition is Sth 47 over Minocqua 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 July 2023.

How much traffic does Sth 47 over Minocqua Lake carry?

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

How long is Sth 47 over Minocqua Lake?

The structure is 67 ft (20.4 m) long with a longest span of 25 ft (7.6 m) and a deck 46 ft wide.

Who owns Sth 47 over Minocqua Lake?

It is owned by the State Highway Agency.