US Bridges

Sth 64 over Br Willow River

Fair

St. Croix County, Wisconsin · 3.6M E JCT Sth 65 to N · Structure no. B55069300000000

Built
1941
84 years old, rebuilt 1992
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
27 ft
1 main span
Daily traffic
8,200
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 64 over Br Willow River is a steel stringer/multi-beam or girder carrying Sth 64 over Br Willow River in St. Croix County, Wisconsin. It was built in 1941 and reconstructed in 1992, so it is 84 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 8,200 vehicles a day, roughly 9% of them trucks, projected to reach 9,840 by 2042. The structure is 27 ft (8.1 m) long and 38 ft wide. If it were closed, the detour would be 36.7 mi (59 km).

Location

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CarriesSth 64
CrossesBr Willow River
Location3.6M E JCT Sth 65 to N
RouteState Highway 64
CountySt. Croix County
StateWisconsin
Coordinates45.13694, -92.45772
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating93.6 US tons
Inventory rating55.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length27 ft (8.1 m)
Longest span27 ft (8.1 m)
Deck width38 ft (11.7 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,200 (2022)
Projected traffic9,840 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36.7 mi (59 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 64 over Br Willow River built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1992.

What condition is Sth 64 over Br Willow 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 September 2024.

How much traffic does Sth 64 over Br Willow River carry?

About 8,200 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Sth 64 over Br Willow River?

The structure is 27 ft (8.1 m) long with a longest span of 27 ft (8.1 m) and a deck 38 ft wide.

Who owns Sth 64 over Br Willow River?

It is owned by the State Highway Agency.