Structure 13729 · Marquette County, MI
Carries Old Camp 4 Road over Sand River, Use Lat Lon & Hope 2 Find.
24 ft end to end, longest span 13 ft. 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 multi-beam bridge.
| State | Michigan |
| County | Marquette |
| Location | Use Lat Lon & Hope 2 Find |
| Carries | Old Camp 4 Road |
| Crosses | Sand River |
| Coordinates | 46.45078, -87.15044 |
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 13.1 ft (4 m) |
| Deck Width | 14.1 ft (4.3 m) |
| Deck Area | 31.4 sq m |
| Main Spans | 2 |
| Year Built | 1980 |
| Avg Daily Traffic | 5 (2013) |
| Lanes On Bridge | 1 |
| Last Inspection | October 2024 |
| Inspection Frequency | Every 12 months |
| Owner | Other State Agencies |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 3 — Scour critical |
| Structure Number | 000000000013729 |
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.