S 1 over Clark Fork
Poor Condition60 years old1,354 vehicles/day
Location
| State | Montana |
| County | Granite |
| Location | Drummond |
| Carries | S 1 |
| Crosses | Clark Fork |
| Coordinates | 46.66156, -113.15711 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 3 (Serious) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 300.9 ft (91.7 m) |
| Max Span | 61.0 ft (18.6 m) |
| Deck Width | 31.8 ft (9.7 m) |
| Deck Area | 889.5 sq m |
| Main Spans | 5 |
| Year Built | 1966 |
Traffic
| Avg Daily Traffic | 1,354 (2023) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00019063+02511 |