US Bridges

Cth-M (north) over Rat River

Good

Winnebago County, Wisconsin · 2.6M N JCT Cr-Ii · Structure no. B70092200000000

Built
1933
92 years old, rebuilt 2006
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
779
2022 count
Owner
County
County Highway Agency

About this bridge

Cth-M (north) over Rat River is a prestressed concrete stringer/multi-beam or girder carrying Cth-M (north) over Rat River in Winnebago County, Wisconsin. It was built in 1933 and reconstructed in 2006, so it is 92 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 779 vehicles a day, projected to reach 856 by 2042. The structure is 55 ft (16.8 m) long and 32 ft wide. If it were closed, the detour would be 10.6 mi (17 km).

CarriesCth-M (north)
CrossesRat River
Location2.6M N JCT Cr-Ii
RouteCounty Highway 0M
Coordinates44.23238, -88.64623
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating68.5 US tons
Inventory rating41.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length55 ft (16.8 m)
Longest span52 ft (16 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic779 (2022)
Projected traffic856 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed10.6 mi (17 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 (north) over Rat River built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 2006.

What condition is Cth-M (north) over Rat River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does Cth-M (north) over Rat River carry?

About 779 vehicles per day (2022 count).

How long is Cth-M (north) over Rat River?

The structure is 55 ft (16.8 m) long with a longest span of 52 ft (16 m) and a deck 32 ft wide.

Who owns Cth-M (north) over Rat River?

It is owned by the County Highway Agency.