US Bridges

Sth 70 over Wisconsin River 53

Fair

Vilas County, Wisconsin · 6.6M E JCT Cth O · Structure no. B63001700000000

Built
1993
32 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
261 ft
3 main spans
Daily traffic
6,000
2023 count
Owner
State
State Highway Agency

About this bridge

Sth 70 over Wisconsin River 53 is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 70 over Wisconsin River 53 in Vilas County, Wisconsin. It was built in 1993, so it is 32 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 6,000 vehicles a day, roughly 5% of them trucks, projected to reach 6,480 by 2043. The structure is 261 ft (79.5 m) long and 47 ft wide. If it were closed, the detour would be 67.7 mi (109 km).

Location

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CarriesSth 70
CrossesWisconsin River 53
Location6.6M E JCT Cth O
RouteState Highway 70
CountyVilas County
StateWisconsin
Coordinates45.90368, -89.30561
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.1 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length261 ft (79.5 m)
Longest span88 ft (26.8 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2023)
Projected traffic6,480 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed67.7 mi (109 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 70 over Wisconsin River 53 built?

It was built in 1993, making it 32 years old in 2025.

What condition is Sth 70 over Wisconsin River 53 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 70 over Wisconsin River 53 carry?

About 6,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Sth 70 over Wisconsin River 53?

The structure is 261 ft (79.5 m) long with a longest span of 88 ft (26.8 m) and a deck 47 ft wide.

Who owns Sth 70 over Wisconsin River 53?

It is owned by the State Highway Agency.