M-231 over Sleeper Street
Good Condition12 years old3,500 vehicles/day
Location
| State | Michigan |
| County | Ottawa |
| Location | 3.5 Mi N Of M-45 |
| Carries | M-231 |
| Crosses | Sleeper Street |
| Coordinates | 43.02322, -86.09167 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 143.0 ft (43.6 m) |
| Max Span | 139.8 ft (42.6 m) |
| Deck Width | 49.5 ft (15.1 m) |
| Deck Area | 658.4 sq m |
| Main Spans | 1 |
| Year Built | 2014 |
Traffic
| Avg Daily Traffic | 3,500 |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000013456 |