IRR - US 87 over Big Sandy Creek
Good Condition36 years old1,694 vehicles/day
Location
| State | Montana |
| County | Chouteau |
| Location | 3m N Big Sandy |
| Carries | IRR - US 87 |
| Crosses | Big Sandy Creek |
| Coordinates | 48.21900, -110.07484 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 7 (Good) |
| Culvert | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 10.8 ft (3.3 m) |
| Deck Area | 79.6 sq m |
| Main Spans | 2 |
| Year Built | 1990 |
Traffic
| Avg Daily Traffic | 1,694 (2023) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00010082+09131 |