Structure 1418 · Calhoun County, MI
Carries Marshall Avenue over Mill Race, Marshall Michigan.
24 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 | Calhoun |
| Location | Marshall Michigan |
| Carries | Marshall Avenue |
| Crosses | Mill Race |
| Coordinates | 42.26269, -84.95418 |
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 41.0 ft (12.5 m) |
| Deck Area | 91.2 sq m |
| Main Spans | 1 |
| Year Built | 1980 (reconstructed 2008) |
| Avg Daily Traffic | 1,853 (2005) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
| Last Inspection | July 2023 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000001418 |
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.