I 15 over Marias River
Good Condition50 years old1,311 vehicles/day
Location
| State | Montana |
| County | Toole |
| Location | 6m S Shelby |
| Carries | I 15 |
| Crosses | Marias River |
| Coordinates | 48.42733, -111.89158 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 483.9 ft (147.5 m) |
| Max Span | 126.6 ft (38.6 m) |
| Deck Width | 44.3 ft (13.5 m) |
| Deck Area | 1991.2 sq m |
| Main Spans | 5 |
| Year Built | 1976 |
Traffic
| Avg Daily Traffic | 1,311 (2023) |
| Truck Traffic | 34% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | I00015357+00752 |