I 90 over Big Ditch
Fair Condition56 years old6,161 vehicles/day
Location
| State | Montana |
| County | Stillwater |
| Location | 5.6m W Park City |
| Carries | I 90 |
| Crosses | Big Ditch |
| Coordinates | 45.60571, -109.03151 |
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 | Stringer/Multi-beam |
| Total Length | 73.2 ft (22.3 m) |
| Max Span | 73.2 ft (22.3 m) |
| Deck Width | 44.0 ft (13.4 m) |
| Deck Area | 298.8 sq m |
| Main Spans | 1 |
| Year Built | 1970 |
Traffic
| Avg Daily Traffic | 6,161 (2023) |
| Truck Traffic | 20% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | I00090420+05442 |