Shamrock Road over Boulder River
Fair Condition46 years old40 vehicles/day
Location
| State | Montana |
| County | Jefferson |
| Location | 2 Mi Past Whitehouse C. G |
| Carries | Shamrock Road |
| Crosses | Boulder River |
| Coordinates | 46.25075, -112.51404 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 28.2 ft (8.6 m) |
| Max Span | 26.9 ft (8.2 m) |
| Deck Width | 16.1 ft (4.9 m) |
| Deck Area | 42.1 sq m |
| Main Spans | 1 |
| Year Built | 1980 |
Traffic
| Avg Daily Traffic | 40 (2018) |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | U.S. Forest Service |
| Historical Significance | Historical significance is not determined |
| Structure Number | 010207000003047 |