Sourdough RD over Sweet Grass Creek 027
Fair Condition29 years old100 vehicles/day
Location
| State | Montana |
| County | Sweet Grass |
| Location | 13m NE Big Timber |
| Carries | Sourdough RD |
| Crosses | Sweet Grass Creek 027 |
| Coordinates | 45.96568, -109.75754 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 60.0 ft (18.3 m) |
| Max Span | 59.1 ft (18 m) |
| Deck Width | 20.0 ft (6.1 m) |
| Deck Area | 111.6 sq m |
| Main Spans | 1 |
| Year Built | 1997 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | L49016006+02001 |