Carmichael Road over South Boulder River
Fair Condition27 years old100 vehicles/day
Location
| State | Montana |
| County | Madison |
| Location | 9.5m S Jefferson Island |
| Carries | Carmichael Road |
| Crosses | South Boulder River |
| Coordinates | 45.72844, -111.97217 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete |
| Design | Slab |
| Total Length | 26.6 ft (8.1 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 26.6 ft (8.1 m) |
| Deck Area | 65.6 sq m |
| Main Spans | 1 |
| Year Built | 1999 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000007085 |