US Bridges

Cth-Ii over Rat River

Fair

Winnebago County, Wisconsin · 1.3M N JCT Cth Mm · Structure no. B70008300000000

Built
1975
50 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
96 ft
2 main spans
Daily traffic
625
2022 count
Owner
County
County Highway Agency

About this bridge

Cth-Ii over Rat River is a concrete continuous slab carrying Cth-Ii over Rat River in Winnebago County, Wisconsin. It was built in 1975, so it is 50 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 625 vehicles a day, roughly 9% of them trucks, projected to reach 687 by 2042. The structure is 96 ft (29.4 m) long and 48 ft wide. If it were closed, the detour would be 40.4 mi (65 km).

Location

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CarriesCth-Ii
CrossesRat River
Location1.3M N JCT Cth Mm
RouteCounty Highway 0II
CountyWinnebago County
StateWisconsin
Coordinates44.21329, -88.76189
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length96 ft (29.4 m)
Longest span48 ft (14.6 m)
Deck width48 ft (14.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic625 (2022)
Projected traffic687 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed40.4 mi (65 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-Ii over Rat River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Cth-Ii over Rat 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 November 2023.

How much traffic does Cth-Ii over Rat River carry?

About 625 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Cth-Ii over Rat River?

The structure is 96 ft (29.4 m) long with a longest span of 48 ft (14.6 m) and a deck 48 ft wide.

Who owns Cth-Ii over Rat River?

It is owned by the County Highway Agency.