Structure 1380001P0000000 · Big Horn County, MT
Carries Battlefield Road over Deep Coulee, I-90 Exit 510 East On U.
A culvert 21 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 | Montana |
| County | Big Horn |
| Location | I-90 Exit 510 East On U |
| Carries | Battlefield Road |
| Crosses | Deep Coulee |
| Coordinates | 45.54936, -107.41619 |
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 21.3 ft (6.5 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Area | 35.8 sq m |
| Main Spans | 2 |
| Year Built | 1938 |
| Avg Daily Traffic | 150 (2019) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
| Last Inspection | August 2023 |
| Inspection Frequency | Every 24 months |
| Owner | National Park Service |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 1380001P0000000 |
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.