Manhattan S RD over Irrigation Canal 117
Fair Condition70 years old100 vehicles/day
Location
| State | Montana |
| County | Gallatin |
| Location | 1m S Manhattan |
| Carries | Manhattan S RD |
| Crosses | Irrigation Canal 117 |
| Coordinates | 45.84556, -111.32657 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Slab |
| Total Length | 31.5 ft (9.6 m) |
| Max Span | 31.5 ft (9.6 m) |
| Deck Width | 26.6 ft (8.1 m) |
| Deck Area | 77.8 sq m |
| Main Spans | 1 |
| Year Built | 1956 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | L16441000+02001 |