Roundhouse RD over Big Spring Creek 135
Good Condition10 years old100 vehicles/day
Location
| State | Montana |
| County | Fergus |
| Location | 2m S Lewistown |
| Carries | Roundhouse RD |
| Crosses | Big Spring Creek 135 |
| Coordinates | 47.03938, -109.40949 |
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 | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 54.1 ft (16.5 m) |
| Max Span | 51.8 ft (15.8 m) |
| Deck Width | 32.5 ft (9.9 m) |
| Deck Area | 163.3 sq m |
| Main Spans | 1 |
| Year Built | 2016 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000002828 |