US Bridges

Sth 13-STH 77-MAIN over Bad River

Good

Ashland County, Wisconsin · 3.1M N JCT Cth Mm · Structure no. B02007400000000

Built
2023
2 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete Continuous
Length
73 ft
2 main spans
Daily traffic
3,000
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 13-STH 77-MAIN over Bad River is a concrete continuous slab carrying Sth 13-STH 77-MAIN over Bad River in Ashland County, Wisconsin. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,000 vehicles a day, roughly 12% of them trucks, projected to reach 3,600 by 2042. The structure is 73 ft (22.1 m) long and 54 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

Open in Google Maps
CarriesSth 13-STH 77-MAIN
CrossesBad River
Location3.1M N JCT Cth Mm
RouteState Highway 13
CountyAshland County
StateWisconsin
Coordinates46.32427, -90.66046
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating42.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length73 ft (22.1 m)
Longest span35 ft (10.7 m)
Deck width54 ft (16.5 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2022)
Projected traffic3,600 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed44.7 mi (72 km)
TollOn a free road
National Highway SystemYes

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 13-STH 77-MAIN over Bad River built?

It was built in 2023, making it 2 years old in 2025.

What condition is Sth 13-STH 77-MAIN over Bad River 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 October 2023.

How much traffic does Sth 13-STH 77-MAIN over Bad River carry?

About 3,000 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Sth 13-STH 77-MAIN over Bad River?

The structure is 73 ft (22.1 m) long with a longest span of 35 ft (10.7 m) and a deck 54 ft wide.

Who owns Sth 13-STH 77-MAIN over Bad River?

It is owned by the State Highway Agency.