US Bridges

Cth M over Big Rib River

FairPosted for load

Taylor County, Wisconsin · 2.3M E JCT Cth C · Structure no. B60000700000000

Built
1963
62 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
65 ft
2 main spans
Daily traffic
451
2022 count
Owner
County
County Highway Agency

About this bridge

Cth M over Big Rib River is a concrete continuous slab carrying Cth M over Big Rib River in Taylor County, Wisconsin. It was built in 1963, so it is 62 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. Its operating status is: posted for other load-capacity restriction.

It carries about 451 vehicles a day, projected to reach 496 by 2042. The structure is 65 ft (19.7 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCth M
CrossesBig Rib River
Location2.3M E JCT Cth C
RouteCounty Highway 0M
CountyTaylor County
StateWisconsin
Coordinates45.22319, -90.12125
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length65 ft (19.7 m)
Longest span31 ft (9.4 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic451 (2022)
Projected traffic496 by 2042
Trucks0%
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 Big Rib River built?

It was built in 1963, making it 62 years old in 2025.

What condition is Cth M over Big Rib 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 Big Rib River carry?

About 451 vehicles per day (2022 count).

How long is Cth M over Big Rib River?

The structure is 65 ft (19.7 m) long with a longest span of 31 ft (9.4 m) and a deck 29 ft wide.

Who owns Cth M over Big Rib River?

It is owned by the County Highway Agency.