US Bridges

Ush 12-STH 27/54-M over Black River

Fair

Jackson County, Wisconsin · 0.1M E JCT Sth 54 to W · Structure no. B27007300000000

Built
1980
45 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
562 ft
4 main spans
Daily traffic
18,825
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Ush 12-STH 27/54-M over Black River is a steel continuous stringer/multi-beam or girder carrying Ush 12-STH 27/54-M over Black River in Jackson County, Wisconsin. It was built in 1980, so it is 45 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 18,825 vehicles a day, roughly 3% of them trucks, projected to reach 20,707 by 2043. The structure is 562 ft (171.4 m) long and 66 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesUsh 12-STH 27/54-M
CrossesBlack River
Location0.1M E JCT Sth 54 to W
RouteU.S. Route 12
Coordinates44.295, -90.84667
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.6 US tons
Inventory rating39.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length562 ft (171.4 m)
Longest span155 ft (47.2 m)
Deck width66 ft (20.1 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,825 (2022)
Projected traffic20,707 by 2043
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Ush 12-STH 27/54-M over Black River built?

It was built in 1980, making it 45 years old in 2025.

What condition is Ush 12-STH 27/54-M over Black 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 October 2024.

How much traffic does Ush 12-STH 27/54-M over Black River carry?

About 18,825 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Ush 12-STH 27/54-M over Black River?

The structure is 562 ft (171.4 m) long with a longest span of 155 ft (47.2 m) and a deck 66 ft wide.

Who owns Ush 12-STH 27/54-M over Black River?

It is owned by the City or Municipal Highway Agency.