CR 489(red Oak Rd) over Au Sable River
Fair Condition67 years old1,540 vehicles/day
Location
| State | Michigan |
| County | Oscoda |
| Location | Sec 2-3 Big Creek Twp |
| Carries | CR 489(red Oak Rd) |
| Crosses | Au Sable River |
| Coordinates | 44.67674, -84.29214 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 129.9 ft (39.6 m) |
| Max Span | 35.1 ft (10.7 m) |
| Deck Width | 33.1 ft (10.1 m) |
| Deck Area | 400.0 sq m |
| Main Spans | 4 |
| Year Built | 1959 |
Traffic
| Avg Daily Traffic | 1,540 (2005) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000008667 |