M-99 over Spring Brook
Fair Condition27 years old2,089 vehicles/day
Location
| State | Michigan |
| County | Jackson |
| Location | 0.1 Mi S Of Eaton Co Line |
| Carries | M-99 |
| Crosses | Spring Brook |
| Coordinates | 42.42061, -84.64996 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 55.1 ft (16.8 m) |
| Max Span | 51.8 ft (15.8 m) |
| Deck Width | 46.9 ft (14.3 m) |
| Deck Area | 240.2 sq m |
| Main Spans | 1 |
| Year Built | 1999 |
Traffic
| Avg Daily Traffic | 2,089 (2007) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000004382 |