Structure 4020 · Ionia County, MI
Carries Grand River Avenue over Libhart Creek, 5 Mi S Of Ionia & 1 Mi E.
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 tee-beam bridge.
| State | Michigan |
| County | Ionia |
| Location | 5 Mi S Of Ionia & 1 Mi E |
| Carries | Grand River Avenue |
| Crosses | Libhart Creek |
| Coordinates | 42.88599, -85.05522 |
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 23.0 ft (7 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 38.1 ft (11.6 m) |
| Deck Area | 81.2 sq m |
| Main Spans | 1 |
| Year Built | 1936 |
| Avg Daily Traffic | 1,093 (2010) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
| Last Inspection | October 2024 |
| Inspection Frequency | Every 12 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 3 — Scour critical |
| Structure Number | 000000000004020 |
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.