US Bridges

Cth C over Marengo River

Fair

Ashland County, Wisconsin · 2.0M S JCT Sth 112 · Structure no. B02003200000000

Built
1990
35 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
72 ft
2 main spans
Daily traffic
170
2024 count
Owner
County
County Highway Agency

About this bridge

Cth C over Marengo River is a concrete continuous slab carrying Cth C over Marengo River in Ashland County, Wisconsin. It was built in 1990, so it is 35 years old, younger 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 170 vehicles a day, roughly 8% of them trucks, projected to reach 177 by 2043. The structure is 72 ft (22 m) long and 30 ft wide. If it were closed, the detour would be 15.5 mi (25 km).

Location

Open in Google Maps
CarriesCth C
CrossesMarengo River
Location2.0M S JCT Sth 112
RouteCounty Highway 0C
CountyAshland County
StateWisconsin
Coordinates46.41936, -90.90384
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length72 ft (22 m)
Longest span35 ft (10.7 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2024)
Projected traffic177 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed15.5 mi (25 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 C over Marengo River built?

It was built in 1990, making it 35 years old in 2025.

What condition is Cth C over Marengo 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 August 2024.

How much traffic does Cth C over Marengo River carry?

About 170 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Cth C over Marengo River?

The structure is 72 ft (22 m) long with a longest span of 35 ft (10.7 m) and a deck 30 ft wide.

Who owns Cth C over Marengo River?

It is owned by the County Highway Agency.