US Bridges

Cth M over Pigeon River

FairPosted for load

Manitowoc County, Wisconsin · 1.7M S JCT Cth Xx · Structure no. P36006600000000

Built
1962
63 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
1,550
2023 count
Owner
County
County Highway Agency

About this bridge

Cth M over Pigeon River is a prestressed concrete box beam or girders - multiple carrying Cth M over Pigeon River in Manitowoc County, Wisconsin. It was built in 1962, so it is 63 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 load restriction.

It carries about 1,550 vehicles a day, projected to reach 1,800 by 2041. The structure is 40 ft (12.2 m) long and 30 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesCth M
CrossesPigeon River
Location1.7M S JCT Cth Xx
RouteCounty Highway 0M
CountyManitowoc County
StateWisconsin
Coordinates43.9038, -87.88143
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 protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating34.2 US tons
Inventory rating19.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length40 ft (12.2 m)
Longest span37 ft (11.3 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,550 (2023)
Projected traffic1,800 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Pigeon River built?

It was built in 1962, making it 63 years old in 2025.

What condition is Cth M over Pigeon 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 Pigeon River carry?

About 1,550 vehicles per day (2023 count).

How long is Cth M over Pigeon River?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.3 m) and a deck 30 ft wide.

Who owns Cth M over Pigeon River?

It is owned by the County Highway Agency.