Structure 13257 · Marquette County, MI
Carries County RD Oc over Nelson Creek, 0.5 Mi E Of Us-41.
A culvert 22 ft across. 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, so those are drawn as typical for a culvert.
| State | Michigan |
| County | Marquette |
| Location | 0.5 Mi E Of Us-41 |
| Carries | County RD Oc |
| Crosses | Nelson Creek |
| Coordinates | 46.36969, -87.22307 |
| Material | Aluminum/Wrought Iron/Cast Iron |
| Design | Culvert |
| Total Length | 21.7 ft (6.6 m) |
| Max Span | 21.7 ft (6.6 m) |
| Deck Area | 56.1 sq m |
| Main Spans | 1 |
| Year Built | 2004 |
| Avg Daily Traffic | 40 (2004) |
| 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 | 000000000013257 |
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.