Mackinaw Road over Johnson Drain
Good Condition5 years old409 vehicles/day
Location
| State | Michigan |
| County | Bay |
| Location | 1000 Ft S Of Townline RD |
| Carries | Mackinaw Road |
| Crosses | Johnson Drain |
| Coordinates | 43.82246, -83.98655 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Single/Spread |
| Total Length | 44.9 ft (13.7 m) |
| Max Span | 43.6 ft (13.3 m) |
| Deck Width | 34.4 ft (10.5 m) |
| Deck Area | 143.8 sq m |
| Main Spans | 1 |
| Year Built | 2021 |
Traffic
| Avg Daily Traffic | 409 (2020) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000000707 |