Miles Road CO 585 over Flat River
GoodMontcalm County, Michigan · 2.7 MI SW Six Lakes · Structure no. 000000000007473
- Built
- 1968
- 57 years old
- Condition
- Good
- inspected September 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 71 ft
- 1 main span
- Daily traffic
- 752
- 2016 count
- Owner
- County
- County Highway Agency
About this bridge
Miles Road CO 585 over Flat River is a prestressed concrete box beam or girders - multiple carrying Miles Road CO 585 over Flat River in Montcalm County, Michigan. It was built in 1968, so it is 57 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 752 vehicles a day, roughly 2% of them trucks, projected to reach 918 by 2036. The structure is 71 ft (21.6 m) long and 33 ft wide. If it were closed, the detour would be 16.2 mi (26 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 Miles Road CO 585 over Flat River built?
It was built in 1968, making it 57 years old in 2025.
What condition is Miles Road CO 585 over Flat 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 September 2024.
How much traffic does Miles Road CO 585 over Flat River carry?
About 752 vehicles per day (2016 count), of which roughly 2% are trucks.
How long is Miles Road CO 585 over Flat River?
The structure is 71 ft (21.6 m) long with a longest span of 69 ft (21 m) and a deck 33 ft wide.
Who owns Miles Road CO 585 over Flat River?
It is owned by the County Highway Agency.