18131: Maiden Rock over Big Hole River
Fair Condition75 years old25 vehicles/day
Location
| State | Montana |
| County | Silver Bow |
| Location | 24 Mi SW Of Butte Mt |
| Carries | 18131: Maiden Rock |
| Crosses | Big Hole River |
| Coordinates | 45.70152, -112.73534 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel |
| Design | Truss - Thru |
| Total Length | 202.1 ft (61.6 m) |
| Max Span | 198.2 ft (60.4 m) |
| Deck Width | 21.0 ft (6.4 m) |
| Deck Area | 394.2 sq m |
| Main Spans | 1 |
| Year Built | 1951 (reconstructed 1993) |
Traffic
| Avg Daily Traffic | 25 (2022) |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | Bureau of Land Management |
| Historical Significance | Historical significance is not determined |
| Structure Number | 000000000L59197 |