Structure 202108041 · Fergus County, MT
Carries US 87 over Drainage, 7.125m E Hobson.
A culvert 20 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 | Montana |
| County | Fergus |
| Location | 7.125m E Hobson |
| Carries | US 87 |
| Crosses | Drainage |
| Coordinates | 46.98304, -109.70942 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Area | 74.4 sq m |
| Main Spans | 1 |
| Year Built | 2021 |
| Avg Daily Traffic | 2,319 (2023) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000202108041 |
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.