County RD 478 over Greenwood Reservoir
Poor Condition54 years old350 vehicles/day
Location
| State | Michigan |
| County | Marquette |
| Location | 4.0 Miles South Of Us41 |
| Carries | County RD 478 |
| Crosses | Greenwood Reservoir |
| Coordinates | 46.44393, -87.81379 |
Condition Ratings
| Overall Condition | Poor |
| Channel/Waterway | 7 (Good) |
| Culvert | 3 (Serious) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Culvert |
| Total Length | 29.9 ft (9.1 m) |
| Max Span | 29.9 ft (9.1 m) |
| Deck Area | 121.9 sq m |
| Main Spans | 1 |
| Year Built | 1972 |
Traffic
| Avg Daily Traffic | 350 (1996) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 12 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000006544 |