Three Mile Road over Munuscong River
Good Condition48 years old40 vehicles/day
Location
| State | Michigan |
| County | Mackinac |
| Location | 9.2mi N Of Hessel And M-1 |
| Carries | Three Mile Road |
| Crosses | Munuscong River |
| Coordinates | 46.13967, -84.42569 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 111.9 ft (34.1 m) |
| Max Span | 55.8 ft (17 m) |
| Deck Width | 30.5 ft (9.3 m) |
| Deck Area | 317.1 sq m |
| Main Spans | 2 |
| Year Built | 1978 |
Traffic
| Avg Daily Traffic | 40 (2015) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000005987 |