Structure 13972 · Midland County, MI
Carries North Jefferson RD over Herner Drain, Mills Twp Sec 3/4.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.
How ratings work23 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 slab bridge.
| State | Michigan |
| County | Midland |
| Location | Mills Twp Sec 3/4 |
| Carries | North Jefferson RD |
| Crosses | Herner Drain |
| Coordinates | 43.82347, -84.22728 |
| Material | Wood or Timber |
| Design | Slab |
| Total Length | 23.0 ft (7 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 36.4 ft (11.1 m) |
| Deck Area | 77.7 sq m |
| Main Spans | 1 |
| Year Built | 2016 |
| Avg Daily Traffic | 283 (2016) |
| Lanes On Bridge | 2 |
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000013972 |
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.