US Bridges

Sth 47 over Mishonagon Creek

Good

Vilas County, Wisconsin · At Mishonagon Creek · Structure no. B63002400000000

Built
2008
17 years old
Condition
Good
inspected August 2022
Type
Slab
Concrete
Length
49 ft
1 main span
Daily traffic
4,800
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 47 over Mishonagon Creek is a concrete slab carrying Sth 47 over Mishonagon Creek in Vilas County, Wisconsin. It was built in 2008, so it is 17 years old, younger 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 4,800 vehicles a day, projected to reach 8,700 by 2041. The structure is 49 ft (14.9 m) long and 43 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

Open in Google Maps
CarriesSth 47
CrossesMishonagon Creek
LocationAt Mishonagon Creek
RouteState Highway 47
CountyVilas County
StateWisconsin
Coordinates45.91159, -89.75902
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating93.6 US tons
Inventory rating55.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length49 ft (14.9 m)
Longest span46 ft (14 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,800 (2022)
Projected traffic8,700 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 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 Mishonagon Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Sth 47 over Mishonagon Creek 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 47 over Mishonagon Creek carry?

About 4,800 vehicles per day (2022 count).

How long is Sth 47 over Mishonagon Creek?

The structure is 49 ft (14.9 m) long with a longest span of 46 ft (14 m) and a deck 43 ft wide.

Who owns Sth 47 over Mishonagon Creek?

It is owned by the State Highway Agency.