County RD 612 over Au Sable River
GoodCrawford County, Michigan · 0.5 MI W of Frederic · Structure no. 000000000002064
- Built
- 2023
- 2 years old
- Condition
- Good
- inspected October 2024
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete
- Length
- 65 ft
- 1 main span
- Daily traffic
- 1,131
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
County RD 612 over Au Sable River is a prestressed concrete box beam or girders - single or spread carrying County RD 612 over Au Sable River in Crawford County, Michigan. It was built in 2023, so it is 2 years old, younger 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,131 vehicles a day, roughly 6% of them trucks, projected to reach 2,104 by 2042. The structure is 65 ft (19.8 m) long and 37 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 | 9 Excellent | No problems noted. |
| Superstructure | 9 Excellent | No problems noted. |
| Substructure | 9 Excellent | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was County RD 612 over Au Sable River built?
It was built in 2023, making it 2 years old in 2025.
What condition is County RD 612 over Au Sable River 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 October 2024.
How much traffic does County RD 612 over Au Sable River carry?
About 1,131 vehicles per day (2021 count), of which roughly 6% are trucks.
How long is County RD 612 over Au Sable River?
The structure is 65 ft (19.8 m) long with a longest span of 62 ft (18.9 m) and a deck 37 ft wide.
Who owns County RD 612 over Au Sable River?
It is owned by the County Highway Agency.