Structure 2219 · Eaton County, MI
Carries M-79 over Little Thornapple River, 3.0 Mi W Of Charlotte.
23 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.
| State | Michigan |
| County | Eaton |
| Location | 3.0 Mi W Of Charlotte |
| Carries | M-79 |
| Crosses | Little Thornapple River |
| Coordinates | 42.56817, -84.90012 |
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 23.3 ft (7.1 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 47.2 ft (14.4 m) |
| Deck Area | 102.2 sq m |
| Main Spans | 1 |
| Year Built | 1946 (reconstructed 1990) |
| Avg Daily Traffic | 5,470 (2007) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Last Inspection | April 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000002219 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.