Marine City HWY over Marsac Creek Drain
GoodSt. Clair County, Michigan · Sec 32 Casco Twp · Structure no. 000000000010034
- Built
- 1946
- 79 years old, rebuilt 2012
- Condition
- Good
- inspected September 2024
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete
- Length
- 31 ft
- 1 main span
- Daily traffic
- 14,000
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Marine City HWY over Marsac Creek Drain is a prestressed concrete box beam or girders - single or spread carrying Marine City HWY over Marsac Creek Drain in St. Clair County, Michigan. It was built in 1946 and reconstructed in 2012, so it is 79 years old, older than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 14,000 vehicles a day, roughly 8% of them trucks, projected to reach 25,285 by 2040. The structure is 31 ft (9.6 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Marine City HWY over Marsac Creek Drain built?
It was built in 1946, making it 79 years old in 2025. It was reconstructed in 2012.
What condition is Marine City HWY over Marsac Creek Drain in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.
How much traffic does Marine City HWY over Marsac Creek Drain carry?
About 14,000 vehicles per day (2020 count), of which roughly 8% are trucks.
How long is Marine City HWY over Marsac Creek Drain?
The structure is 31 ft (9.6 m) long with a longest span of 29 ft (8.9 m) and a deck 42 ft wide.
Who owns Marine City HWY over Marsac Creek Drain?
It is owned by the County Highway Agency.