Airport Road over Thunder Bay River
Good Condition57 years old160 vehicles/day
Location
| State | Michigan |
| County | Montmorency |
| Location | Sections 7-18 Avery Twp |
| Carries | Airport Road |
| Crosses | Thunder Bay River |
| Coordinates | 45.00035, -84.11883 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 7 (Good) |
| Culvert | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Culvert |
| Total Length | 38.1 ft (11.6 m) |
| Max Span | 7.2 ft (2.2 m) |
| Deck Area | 105.6 sq m |
| Main Spans | 4 |
| Year Built | 1969 |
Traffic
| Avg Daily Traffic | 160 (2005) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000012719 |