US Bridges

Sth 70 over Catfish Lake

Good

Vilas County, Wisconsin · 2.4M E JCT Ush 45 to S · Structure no. B63000800000000

Built
1978
47 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
288 ft
3 main spans
Daily traffic
4,300
2023 count
Owner
State
State Highway Agency

About this bridge

Sth 70 over Catfish Lake is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 70 over Catfish Lake in Vilas County, Wisconsin. It was built in 1978, so it is 47 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 4,300 vehicles a day, roughly 5% of them trucks, projected to reach 10,080 by 2043. The structure is 288 ft (87.7 m) long and 47 ft wide. If it were closed, the detour would be 72.7 mi (117 km).

CarriesSth 70
CrossesCatfish Lake
Location2.4M E JCT Ush 45 to S
RouteState Highway 70
Coordinates45.91974, -89.18007
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 protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating28.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length288 ft (87.7 m)
Longest span95 ft (29.1 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2023)
Projected traffic10,080 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed72.7 mi (117 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 Catfish Lake built?

It was built in 1978, making it 47 years old in 2025.

What condition is Sth 70 over Catfish Lake 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 2024.

How much traffic does Sth 70 over Catfish Lake carry?

About 4,300 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Sth 70 over Catfish Lake?

The structure is 288 ft (87.7 m) long with a longest span of 95 ft (29.1 m) and a deck 47 ft wide.

Who owns Sth 70 over Catfish Lake?

It is owned by the State Highway Agency.