US Bridges

Cth H over Black Creek

Poor

Marathon County, Wisconsin · 3.5M N JCT Cth U · Structure no. B37013500000000

Built
1969
56 years old
Condition
Poor
inspected August 2024
Type
Slab
Concrete Continuous
Length
126 ft
3 main spans
Daily traffic
807
2024 count
Owner
County
County Highway Agency

About this bridge

Cth H over Black Creek is a concrete continuous slab carrying Cth H over Black Creek in Marathon County, Wisconsin. It was built in 1969, so it is 56 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 807 vehicles a day, projected to reach 451 by 2043. The structure is 126 ft (38.5 m) long and 35 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

CarriesCth H
CrossesBlack Creek
Location3.5M N JCT Cth U
RouteCounty Highway 0H
Coordinates45.02426, -89.96378
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 rating50.4 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length126 ft (38.5 m)
Longest span50 ft (15.2 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic807 (2024)
Projected traffic451 by 2043
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$686,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth H over Black Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Cth H over Black Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Cth H over Black Creek carry?

About 807 vehicles per day (2024 count).

How long is Cth H over Black Creek?

The structure is 126 ft (38.5 m) long with a longest span of 50 ft (15.2 m) and a deck 35 ft wide.

Who owns Cth H over Black Creek?

It is owned by the County Highway Agency.