US Bridges

Cth O over Little Rib River

Fair

Marathon County, Wisconsin · 1.9M N JCT Cth U · Structure no. B37015100000000

Built
1970
55 years old, rebuilt 2021
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
190 ft
3 main spans
Daily traffic
1,250
2023 count
Owner
County
County Highway Agency

About this bridge

Cth O over Little Rib River is a prestressed concrete continuous stringer/multi-beam or girder carrying Cth O over Little Rib River in Marathon County, Wisconsin. It was built in 1970 and reconstructed in 2021, so it is 55 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 1,250 vehicles a day, projected to reach 1,200 by 2039. The structure is 190 ft (57.8 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCth O
CrossesLittle Rib River
Location1.9M N JCT Cth U
RouteCounty Highway 0O
CountyMarathon County
StateWisconsin
Coordinates45.01575, -89.76777
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length190 ft (57.8 m)
Longest span62 ft (19 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,250 (2023)
Projected traffic1,200 by 2039
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Little Rib River built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2021.

What condition is Cth O over Little 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 September 2023.

How much traffic does Cth O over Little Rib River carry?

About 1,250 vehicles per day (2023 count).

How long is Cth O over Little Rib River?

The structure is 190 ft (57.8 m) long with a longest span of 62 ft (19 m) and a deck 37 ft wide.

Who owns Cth O over Little Rib River?

It is owned by the County Highway Agency.