M-33 over Thunder Bay River
Fair Condition58 years old1,647 vehicles/day
Location
| State | Michigan |
| County | Montmorency |
| Location | 1.5 Mi S Of M-32 |
| Carries | M-33 |
| Crosses | Thunder Bay River |
| Coordinates | 44.97197, -84.03212 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 65.3 ft (19.9 m) |
| Max Span | 63.6 ft (19.4 m) |
| Deck Width | 47.6 ft (14.5 m) |
| Deck Area | 288.6 sq m |
| Main Spans | 1 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 1,647 (2007) |
| Truck Traffic | 18% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000007536 |