Structure 6105180 · Bowman County, ND
Carries County Highway over Trib. Little Missouri, 20 South Marmarth.
A culvert 25 ft across with 2 openings. 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 | North Dakota |
| County | Bowman |
| Location | 20 South Marmarth |
| Carries | County Highway |
| Crosses | Trib. Little Missouri |
| Coordinates | 46.01999, -103.96420 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 24.6 ft (7.5 m) |
| Max Span | 12.1 ft (3.7 m) |
| Deck Width | 120.1 ft (36.6 m) |
| Deck Area | 274.5 sq m |
| Main Spans | 2 |
| Year Built | 2008 |
| Avg Daily Traffic | 90 (2017) |
| Lanes On Bridge | 2 |
| Last Inspection | October 2021 |
| Inspection Frequency | Every 48 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000006105180 |
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.