US Bridges

Cth M over W Br Rock River

FairPosted for load

Fond du Lac County, Wisconsin · 0.4M N JCT Cth T(west) · Structure no. B20067900000000

Built
1929
96 years old, rebuilt 1976
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
28 ft
1 main span
Daily traffic
1,400
2021 count
Owner
County
County Highway Agency

About this bridge

Cth M over W Br Rock River is a concrete stringer/multi-beam or girder carrying Cth M over W Br Rock River in Fond du Lac County, Wisconsin. It was built in 1929 and reconstructed in 1976, so it is 96 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. Its operating status is: posted for other load-capacity restriction.

It carries about 1,400 vehicles a day, projected to reach 1,680 by 2041. The structure is 28 ft (8.4 m) long and 36 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

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CarriesCth M
CrossesW Br Rock River
Location0.4M N JCT Cth T(west)
RouteCounty Highway 0M
CountyFond du Lac County
StateWisconsin
Coordinates43.74785, -88.7199
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity 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 rating41.4 US tons
Inventory rating23.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length28 ft (8.4 m)
Longest span27 ft (8.1 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2021)
Projected traffic1,680 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 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 over W Br Rock River built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1976.

What condition is Cth M over W Br Rock 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 October 2023.

How much traffic does Cth M over W Br Rock River carry?

About 1,400 vehicles per day (2021 count).

How long is Cth M over W Br Rock River?

The structure is 28 ft (8.4 m) long with a longest span of 27 ft (8.1 m) and a deck 36 ft wide.

Who owns Cth M over W Br Rock River?

It is owned by the County Highway Agency.