Royston over Big Thornapple Drain
Fair Condition74 years old78 vehicles/day
Location
| State | Michigan |
| County | Eaton |
| Location | 2 Mi SE Potterville |
| Carries | Royston |
| Crosses | Big Thornapple Drain |
| Coordinates | 42.60287, -84.71934 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 43.0 ft (13.1 m) |
| Max Span | 31.8 ft (9.7 m) |
| Deck Width | 24.3 ft (7.4 m) |
| Deck Area | 96.9 sq m |
| Main Spans | 1 |
| Year Built | 1952 |
Traffic
| Avg Daily Traffic | 78 (2011) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 523 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000002376 |