Main Boulder RD over Boulder River
Fair Condition76 years old529 vehicles/day
Location
| State | Montana |
| County | Sweet Grass |
| Location | 3m NE Mcleod |
| Carries | Main Boulder RD |
| Crosses | Boulder River |
| Coordinates | 45.68921, -110.06519 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 152.9 ft (46.6 m) |
| Max Span | 58.1 ft (17.7 m) |
| Deck Width | 22.6 ft (6.9 m) |
| Deck Area | 321.5 sq m |
| Main Spans | 3 |
| Year Built | 1950 |
Traffic
| Avg Daily Traffic | 529 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00298013+00001 |