US Bridges

Sth 64 over Hay River

Fair

Dunn County, Wisconsin · 0.7M E JCT Cth F to S · Structure no. B17016900000000

Built
1936
89 years old, rebuilt 1989
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
195 ft
3 main spans
Daily traffic
4,000
2024 count
Owner
State
State Highway Agency

About this bridge

Sth 64 over Hay River is a steel stringer/multi-beam or girder carrying Sth 64 over Hay River in Dunn County, Wisconsin. It was built in 1936 and reconstructed in 1989, so it is 89 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 4,000 vehicles a day, roughly 11% of them trucks, projected to reach 4,510 by 2044. The structure is 195 ft (59.3 m) long and 31 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesSth 64
CrossesHay River
Location0.7M E JCT Cth F to S
RouteState Highway 64
Coordinates45.13623, -91.93769
Functional classRural Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating43.2 US tons
Inventory rating25 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length195 ft (59.3 m)
Longest span64 ft (19.4 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2024)
Projected traffic4,510 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 64 over Hay River built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1989.

What condition is Sth 64 over Hay 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 Hay River carry?

About 4,000 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Sth 64 over Hay River?

The structure is 195 ft (59.3 m) long with a longest span of 64 ft (19.4 m) and a deck 31 ft wide.

Who owns Sth 64 over Hay River?

It is owned by the State Highway Agency.