Cth M over Black Creek
FairMarathon County, Wisconsin · 0.7M S JCT Cth F · Structure no. P37016500000000
- Built
- 1972
- 53 years old, rebuilt 2011
- Condition
- Fair
- inspected October 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 46 ft
- 1 main span
- Daily traffic
- 244
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Cth M over Black Creek is a prestressed concrete box beam or girders - multiple carrying Cth M over Black Creek in Marathon County, Wisconsin. It was built in 1972 and reconstructed in 2011, so it is 53 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.
It carries about 244 vehicles a day, projected to reach 333 by 2042. The structure is 46 ft (14.1 m) long and 29 ft wide. If it were closed, the detour would be 11.8 mi (19 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Cth M over Black Creek built?
It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2011.
What condition is Cth M over Black Creek 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 Black Creek carry?
About 244 vehicles per day (2023 count).
How long is Cth M over Black Creek?
The structure is 46 ft (14.1 m) long with a longest span of 44 ft (13.4 m) and a deck 29 ft wide.
Who owns Cth M over Black Creek?
It is owned by the County Highway Agency.