US Bridges

Cth M over Black River

Fair

Taylor County, Wisconsin · 1.7M W JCT Sth 13 · Structure no. B60009000000000

Built
2004
21 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
96 ft
2 main spans
Daily traffic
1,200
2022 count
Owner
County
County Highway Agency

About this bridge

Cth M over Black River is a concrete continuous slab carrying Cth M over Black River in Taylor County, Wisconsin. It was built in 2004, so it is 21 years old, younger 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 1,200 vehicles a day, roughly 4% of them trucks, projected to reach 1,239 by 2042. The structure is 96 ft (29.4 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCth M
CrossesBlack River
Location1.7M W JCT Sth 13
RouteCounty Highway 0M
CountyTaylor County
StateWisconsin
Coordinates45.206, -90.36244
Functional classRural Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length96 ft (29.4 m)
Longest span47 ft (14.3 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2022)
Projected traffic1,239 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 M over Black River built?

It was built in 2004, making it 21 years old in 2025.

What condition is Cth M 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 August 2023.

How much traffic does Cth M over Black River carry?

About 1,200 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Cth M over Black River?

The structure is 96 ft (29.4 m) long with a longest span of 47 ft (14.3 m) and a deck 36 ft wide.

Who owns Cth M over Black River?

It is owned by the County Highway Agency.