S 37 Fh 57 over Rock Gut
Poor Condition52 years old346 vehicles/day
Location
| State | Montana |
| County | Lincoln |
| Location | 22m N Libby Dam |
| Carries | S 37 Fh 57 |
| Crosses | Rock Gut |
| Coordinates | 48.62861, -115.26703 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 269.0 ft (82 m) |
| Max Span | 89.9 ft (27.4 m) |
| Deck Width | 40.0 ft (12.2 m) |
| Deck Area | 1000.4 sq m |
| Main Spans | 3 |
| Year Built | 1974 |
Traffic
| Avg Daily Traffic | 346 (2023) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 125 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00033037+09261 |