Shamrock DR over Bbwa Canal 039
Fair Condition22 years old100 vehicles/day
Location
| State | Montana |
| County | Yellowstone |
| Location | Billings-shamrock DR |
| Carries | Shamrock DR |
| Crosses | Bbwa Canal 039 |
| Coordinates | 45.80860, -108.47981 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 48.9 ft (14.9 m) |
| Max Span | 48.9 ft (14.9 m) |
| Deck Width | 45.6 ft (13.9 m) |
| Deck Area | 207.1 sq m |
| Main Spans | 1 |
| Year Built | 2004 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | M56010000+00501 |