US Bridges

Cth Mmm over S Br Rock River

FairPosted for load

Fond du Lac County, Wisconsin · 0.7M N JCT Sth 49 · Structure no. B20004700000000

Built
1964
61 years old
Condition
Fair
inspected October 2023
Type
Frame
Concrete Continuous
Length
47 ft
1 main span
Daily traffic
1,053
2022 count
Owner
County
County Highway Agency

About this bridge

Cth Mmm over S Br Rock River is a concrete continuous frame carrying Cth Mmm over S Br Rock River in Fond du Lac County, Wisconsin. It was built in 1964, so it is 61 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 1,053 vehicles a day, projected to reach 1,158 by 2042. The structure is 47 ft (14.3 m) long and 37 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesCth Mmm
CrossesS Br Rock River
Location0.7M N JCT Sth 49
RouteCounty Highway 0MMM
CountyFond du Lac County
StateWisconsin
Coordinates43.64374, -88.75932
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
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 protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.4 US tons
Inventory rating19.6 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length47 ft (14.3 m)
Longest span44 ft (13.5 m)
Deck width37 ft (11.3 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,053 (2022)
Projected traffic1,158 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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 Mmm over S Br Rock River built?

It was built in 1964, making it 61 years old in 2025.

What condition is Cth Mmm over S 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 Mmm over S Br Rock River carry?

About 1,053 vehicles per day (2022 count).

How long is Cth Mmm over S Br Rock River?

The structure is 47 ft (14.3 m) long with a longest span of 44 ft (13.5 m) and a deck 37 ft wide.

Who owns Cth Mmm over S Br Rock River?

It is owned by the County Highway Agency.