Structure 5679 · Lenawee County, MI
Carries Bruce HWY over Gleason Brook, 0 4 Mi N Of Horton.
Set by its lowest-rated component: Superstructure and Substructure at 7 of 9.
How ratings work20 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 | Lenawee |
| Location | 0 4 Mi N Of Horton |
| Carries | Bruce HWY |
| Crosses | Gleason Brook |
| Coordinates | 41.81112, -83.96573 |
| Material | Wood or Timber |
| Design | Slab |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 25.3 ft (7.7 m) |
| Deck Area | 47.0 sq m |
| Main Spans | 1 |
| Year Built | 1988 |
| Avg Daily Traffic | 57 (2012) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
| Last Inspection | March 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 000000000005679 |
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.