Ninth Avenue over Thunder Bay River
Fair Condition55 years old5,123 vehicles/day
Location
| State | Michigan |
| County | Alpena |
| Location | 0.23 Mi E Of Us23 HWY |
| Carries | Ninth Avenue |
| Crosses | Thunder Bay River |
| Coordinates | 45.07090, -83.43729 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 244.8 ft (74.6 m) |
| Max Span | 81.7 ft (24.9 m) |
| Deck Width | 64.0 ft (19.5 m) |
| Deck Area | 1454.7 sq m |
| Main Spans | 3 |
| Year Built | 1971 (reconstructed 2006) |
Traffic
| Avg Daily Traffic | 5,123 (2005) |
| Truck Traffic | 3% |
| Lanes On Bridge | 3 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000000358 |