ST Ignace RD FH84 over Nuns Creek
GoodMackinac County, Michigan · 4.0 MI E of M-134 · Structure no. 000000000005978
- Built
- 1985
- 40 years old
- Condition
- Good
- inspected October 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 52 ft
- 1 main span
- Daily traffic
- 220
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
ST Ignace RD FH84 over Nuns Creek is a prestressed concrete box beam or girders - multiple carrying ST Ignace RD FH84 over Nuns Creek in Mackinac County, Michigan. It was built in 1985, so it is 40 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 220 vehicles a day, roughly 3% of them trucks, projected to reach 290 by 2035. The structure is 52 ft (15.8 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 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 | 8 Very Good | No problems noted. |
| Channel and channel protection | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was ST Ignace RD FH84 over Nuns Creek built?
It was built in 1985, making it 40 years old in 2025.
What condition is ST Ignace RD FH84 over Nuns Creek 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 ST Ignace RD FH84 over Nuns Creek carry?
About 220 vehicles per day (2015 count), of which roughly 3% are trucks.
How long is ST Ignace RD FH84 over Nuns Creek?
The structure is 52 ft (15.8 m) long with a longest span of 48 ft (14.6 m) and a deck 31 ft wide.
Who owns ST Ignace RD FH84 over Nuns Creek?
It is owned by the County Highway Agency.