River Road over Au Sable River
Fair Condition63 years old4,920 vehicles/day
Location
| State | Michigan |
| County | Iosco |
| Location | 0.5 Mi W Of Us-23 |
| Carries | River Road |
| Crosses | Au Sable River |
| Coordinates | 44.42099, -83.34069 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 300.9 ft (91.7 m) |
| Max Span | 43.0 ft (13.1 m) |
| Deck Width | 34.4 ft (10.5 m) |
| Deck Area | 962.9 sq m |
| Main Spans | 7 |
| Year Built | 1963 |
Traffic
| Avg Daily Traffic | 4,920 (2006) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000004139 |