Dunn LN over Boulder River 028
Good Condition11 years old100 vehicles/day
Location
| State | Montana |
| County | Jefferson |
| Location | 20m SE Boulder |
| Carries | Dunn LN |
| Crosses | Boulder River 028 |
| Coordinates | 46.06111, -111.87916 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 85.6 ft (26.1 m) |
| Max Span | 83.0 ft (25.3 m) |
| Deck Width | 26.2 ft (8 m) |
| Deck Area | 208.8 sq m |
| Main Spans | 1 |
| Year Built | 2015 |
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 | L22313000+06001 |