Island 8 Road over Hill Channel Lake Huron
GoodMackinac County, Michigan · 2 M E & 1 M S of Cedarvil · Structure no. 000000000005991
- Built
- 1984
- 41 years old
- Condition
- Good
- inspected October 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 90 ft
- 3 main spans
- Daily traffic
- 250
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Island 8 Road over Hill Channel Lake Huron is a prestressed concrete box beam or girders - multiple carrying Island 8 Road over Hill Channel Lake Huron in Mackinac County, Michigan. It was built in 1984, so it is 41 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 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 250 vehicles a day, roughly 3% of them trucks, projected to reach 350 by 2035. The structure is 90 ft (27.4 m) long and 34 ft wide. If it were closed, the detour would be 124.9 mi (201 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 | 8 Very Good | No problems noted. |
| 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 Island 8 Road over Hill Channel Lake Huron built?
It was built in 1984, making it 41 years old in 2025.
What condition is Island 8 Road over Hill Channel Lake Huron 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 2023.
How much traffic does Island 8 Road over Hill Channel Lake Huron carry?
About 250 vehicles per day (2015 count), of which roughly 3% are trucks.
How long is Island 8 Road over Hill Channel Lake Huron?
The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 34 ft wide.
Who owns Island 8 Road over Hill Channel Lake Huron?
It is owned by the County Highway Agency.