M-66 over Grand River
Fair Condition78 years old17,638 vehicles/day
Location
| State | Michigan |
| County | Ionia |
| Location | In Ionia |
| Carries | M-66 |
| Crosses | Grand River |
| Coordinates | 42.97227, -85.06930 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 374.0 ft (114 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 59.7 ft (18.2 m) |
| Deck Area | 2074.8 sq m |
| Main Spans | 5 |
| Year Built | 1948 |
Traffic
| Avg Daily Traffic | 17,638 (2015) |
| Truck Traffic | 3% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000003970 |