IRR - SR 480 over Missouri River
Fair Condition58 years old80 vehicles/day
Location
| State | Montana |
| County | Richland |
| Location | 9m SW Brockton |
| Carries | IRR - SR 480 |
| Crosses | Missouri River |
| Coordinates | 48.06400, -105.03140 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Girder and Floorbeam |
| Total Length | 1056.8 ft (322.1 m) |
| Max Span | 265.7 ft (81 m) |
| Deck Width | 33.1 ft (10.1 m) |
| Deck Area | 3253.2 sq m |
| Main Spans | 4 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 80 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 523 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00480003+00001 |