County RD 478 over Black River
Good Condition7 years old44 vehicles/day
Location
| State | Michigan |
| County | Marquette |
| Location | 3 Miles N E Of Republic |
| Carries | County RD 478 |
| Crosses | Black River |
| Coordinates | 46.42595, -87.92797 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 8 (Very Good) |
| Culvert | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 46.9 ft (14.3 m) |
| Max Span | 46.9 ft (14.3 m) |
| Deck Area | 121.5 sq m |
| Main Spans | 1 |
| Year Built | 2019 |
Traffic
| Avg Daily Traffic | 44 (2019) |
| Truck Traffic | 4% |
| 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 | 000000000006543 |