US Bridges

Cth S over Br Big Rib River

PoorPosted for load

Marathon County, Wisconsin · 2.8M N JCT Cth U to E · Structure no. P37091500000000

Built
1938
87 years old, rebuilt 1975
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
634
2024 count
Owner
County
County Highway Agency

About this bridge

Cth S over Br Big Rib River is a steel stringer/multi-beam or girder carrying Cth S over Br Big Rib River in Marathon County, Wisconsin. It was built in 1938 and reconstructed in 1975, so it is 87 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 634 vehicles a day, projected to reach 496 by 2043. The structure is 33 ft (10.1 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCth S
CrossesBr Big Rib River
Location2.8M N JCT Cth U to E
RouteCounty Highway 0S
Coordinates45.01466, -89.90571
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, 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 inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating23.4 US tons
Inventory rating14.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length33 ft (10.1 m)
Longest span27 ft (8.3 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic634 (2024)
Projected traffic496 by 2043
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$195,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth S over Br Big Rib River built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1975.

What condition is Cth S over Br Big Rib River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Cth S over Br Big Rib River carry?

About 634 vehicles per day (2024 count).

How long is Cth S over Br Big Rib River?

The structure is 33 ft (10.1 m) long with a longest span of 27 ft (8.3 m) and a deck 30 ft wide.

Who owns Cth S over Br Big Rib River?

It is owned by the County Highway Agency.