US Bridges

Sth 64 over Black River

Good

Taylor County, Wisconsin · 0.1M E JCT Cth E to S · Structure no. B60000100000000

Built
1953
72 years old, rebuilt 1987
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
214 ft
3 main spans
Daily traffic
1,880
2024 count
Owner
State
State Highway Agency

About this bridge

Sth 64 over Black River is a steel continuous stringer/multi-beam or girder carrying Sth 64 over Black River in Taylor County, Wisconsin. It was built in 1953 and reconstructed in 1987, so it is 72 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,880 vehicles a day, roughly 17% of them trucks, projected to reach 2,120 by 2044. The structure is 214 ft (65.3 m) long and 34 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesSth 64
CrossesBlack River
Location0.1M E JCT Cth E to S
RouteState Highway 64
Coordinates45.1326, -90.43927
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating25 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length214 ft (65.3 m)
Longest span80 ft (24.4 m)
Deck width34 ft (10.3 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,880 (2024)
Projected traffic2,120 by 2044
Trucks17%
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 Black River built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1987.

What condition is Sth 64 over Black 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 2024.

How much traffic does Sth 64 over Black River carry?

About 1,880 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is Sth 64 over Black River?

The structure is 214 ft (65.3 m) long with a longest span of 80 ft (24.4 m) and a deck 34 ft wide.

Who owns Sth 64 over Black River?

It is owned by the State Highway Agency.