US Bridges

Cth S over Big Rib River

Fair

Marathon County, Wisconsin · 0.1M S JCT Cth U to E · Structure no. B37001400000000

Built
1954
71 years old, rebuilt 1998
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
265 ft
3 main spans
Daily traffic
302
2023 count
Owner
County
County Highway Agency

About this bridge

Cth S over Big Rib River is a prestressed concrete continuous stringer/multi-beam or girder carrying Cth S over Big Rib River in Marathon County, Wisconsin. It was built in 1954 and reconstructed in 1998, so it is 71 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.

It carries about 302 vehicles a day, projected to reach 325 by 2042. The structure is 265 ft (80.9 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCth S
CrossesBig Rib River
Location0.1M S JCT Cth U to E
RouteCounty Highway 0S
CountyMarathon County
StateWisconsin
Coordinates44.97212, -89.90554
Functional classRural Minor 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.
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 above top of footing
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 typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length265 ft (80.9 m)
Longest span104 ft (31.7 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic302 (2023)
Projected traffic325 by 2042
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 S over Big Rib River built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1998.

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

About 302 vehicles per day (2023 count).

How long is Cth S over Big Rib River?

The structure is 265 ft (80.9 m) long with a longest span of 104 ft (31.7 m) and a deck 32 ft wide.

Who owns Cth S over Big Rib River?

It is owned by the County Highway Agency.