US Bridges

Ush 8 over ST Croix River 07

Fair

Polk County, Wisconsin · Minnesota State Line · Structure no. B48000300000000

Built
1955
70 years old, rebuilt 1986
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
405 ft
3 main spans
Daily traffic
14,900
2023 count
Owner
State
State Highway Agency

About this bridge

Ush 8 over ST Croix River 07 is a steel continuous stringer/multi-beam or girder carrying Ush 8 over ST Croix River 07 in Polk County, Wisconsin. It was built in 1955 and reconstructed in 1986, so it is 70 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 5 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 14,900 vehicles a day, roughly 9% of them trucks, projected to reach 15,240 by 2043. The structure is 405 ft (123.3 m) long and 63 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesUsh 8
CrossesST Croix River 07
LocationMinnesota State Line
RouteU.S. Route 8
CountyPolk County
StateWisconsin
Coordinates45.40176, -92.65117
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.4 US tons
Inventory rating19.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length405 ft (123.3 m)
Longest span160 ft (48.8 m)
Deck width63 ft (19.1 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,900 (2023)
Projected traffic15,240 by 2043
Trucks9%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ush 8 over ST Croix River 07 built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1986.

What condition is Ush 8 over ST Croix River 07 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 April 2024.

How much traffic does Ush 8 over ST Croix River 07 carry?

About 14,900 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ush 8 over ST Croix River 07?

The structure is 405 ft (123.3 m) long with a longest span of 160 ft (48.8 m) and a deck 63 ft wide.

Who owns Ush 8 over ST Croix River 07?

It is owned by the State Highway Agency.