S Boulder RD over Upr S Boulder River 055
Fair Condition23 years old100 vehicles/day
Location
| State | Montana |
| County | Madison |
| Location | 4m S Jefferson Island |
| Carries | S Boulder RD |
| Crosses | Upr S Boulder River 055 |
| Coordinates | 45.75999, -111.95971 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 46.3 ft (14.1 m) |
| Max Span | 44.9 ft (13.7 m) |
| Deck Width | 25.9 ft (7.9 m) |
| Deck Area | 111.4 sq m |
| Main Spans | 1 |
| Year Built | 2003 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | L29062003+07001 |