M-29 over Coxs Drain
FairSt. Clair County, Michigan · In Algonac · Structure no. 000000000009970
- Built
- 1952
- 73 years old, rebuilt 1997
- Condition
- Fair
- inspected March 2023
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete
- Length
- 26 ft
- 1 main span
- Daily traffic
- 5,939
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
M-29 over Coxs Drain is a prestressed concrete box beam or girders - single or spread carrying M-29 over Coxs Drain in St. Clair County, Michigan. It was built in 1952 and reconstructed in 1997, so it is 73 years old, older than the Michigan average of 48.3 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 5,939 vehicles a day, roughly 3% of them trucks, projected to reach 8,895 by 2018. The structure is 26 ft (7.8 m) long and 56 ft wide. If it were closed, the detour would be 5 mi (8 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was M-29 over Coxs Drain built?
It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1997.
What condition is M-29 over Coxs Drain 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 March 2023.
How much traffic does M-29 over Coxs Drain carry?
About 5,939 vehicles per day (2007 count), of which roughly 3% are trucks.
How long is M-29 over Coxs Drain?
The structure is 26 ft (7.8 m) long with a longest span of 24 ft (7.4 m) and a deck 56 ft wide.
Who owns M-29 over Coxs Drain?
It is owned by the State Highway Agency.