US Bridges

Cth O over Black River

Fair

Taylor County, Wisconsin · 1.1M E JCT Cth Q · Structure no. P60091600000000

Built
1971
54 years old, rebuilt 2017
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
91 ft
1 main span
Daily traffic
3,600
2022 count
Owner
County
County Highway Agency

About this bridge

Cth O over Black River is a prestressed concrete stringer/multi-beam or girder carrying Cth O over Black River in Taylor County, Wisconsin. It was built in 1971 and reconstructed in 2017, so it is 54 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 3,600 vehicles a day, projected to reach 3,900 by 2043. The structure is 91 ft (27.7 m) long and 33 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCth O
CrossesBlack River
Location1.1M E JCT Cth Q
RouteCounty Highway 0O
CountyTaylor County
StateWisconsin
Coordinates45.12064, -90.34836
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 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 rating62.8 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length91 ft (27.7 m)
Longest span90 ft (27.4 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (2022)
Projected traffic3,900 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Cth O over Black River built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2017.

What condition is Cth O 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 April 2024.

How much traffic does Cth O over Black River carry?

About 3,600 vehicles per day (2022 count).

How long is Cth O over Black River?

The structure is 91 ft (27.7 m) long with a longest span of 90 ft (27.4 m) and a deck 33 ft wide.

Who owns Cth O over Black River?

It is owned by the County Highway Agency.