US Bridges

Sth 70 over Tomahawk River

Fair

Oneida County, Wisconsin · 3.7M E JCT Cth F · Structure no. B43000900000000

Built
1966
59 years old, rebuilt 1993
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
88 ft
3 main spans
Daily traffic
5,400
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 70 over Tomahawk River is a concrete continuous slab carrying Sth 70 over Tomahawk River in Oneida County, Wisconsin. It was built in 1966 and reconstructed in 1993, so it is 59 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 5,400 vehicles a day, roughly 6% of them trucks, projected to reach 8,600 by 2042. The structure is 88 ft (26.9 m) long and 46 ft wide. If it were closed, the detour would be 95.7 mi (154 km).

Location

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CarriesSth 70
CrossesTomahawk River
Location3.7M E JCT Cth F
RouteState Highway 70
CountyOneida County
StateWisconsin
Coordinates45.88718, -89.79465
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 length88 ft (26.9 m)
Longest span34 ft (10.4 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2022)
Projected traffic8,600 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed95.7 mi (154 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 Tomahawk River built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1993.

What condition is Sth 70 over Tomahawk River 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 70 over Tomahawk River carry?

About 5,400 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Sth 70 over Tomahawk River?

The structure is 88 ft (26.9 m) long with a longest span of 34 ft (10.4 m) and a deck 46 ft wide.

Who owns Sth 70 over Tomahawk River?

It is owned by the State Highway Agency.