M-18|lake ST over S Br Au Sable River
Fair Condition91 years old5,505 vehicles/day
Location
| State | Michigan |
| County | Roscommon |
| Location | E Lts Of Roscommon |
| Carries | M-18|lake ST |
| Crosses | S Br Au Sable River |
| Coordinates | 44.50106, -84.58963 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 7 — Countermeasures installed |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Single/Spread |
| Total Length | 49.9 ft (15.2 m) |
| Max Span | 48.6 ft (14.8 m) |
| Deck Width | 42.3 ft (12.9 m) |
| Deck Area | 196.1 sq m |
| Main Spans | 1 |
| Year Built | 1935 (reconstructed 1995) |
Traffic
| Avg Daily Traffic | 5,505 (2018) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000009015 |