Colby Road over Flat River
Fair Condition46 years old723 vehicles/day
Location
| State | Michigan |
| County | Montcalm |
| Location | 0.80 Mile West Of M-91 |
| Carries | Colby Road |
| Crosses | Flat River |
| Coordinates | 43.26459, -85.26891 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 74.8 ft (22.8 m) |
| Max Span | 70.9 ft (21.6 m) |
| Deck Width | 34.1 ft (10.4 m) |
| Deck Area | 237.1 sq m |
| Main Spans | 1 |
| Year Built | 1980 |
Traffic
| Avg Daily Traffic | 723 (2003) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000007515 |