I 90 over Antelope Creek
Poor Condition55 years old100 vehicles/day
Location
| State | Montana |
| County | Granite |
| Location | 11.2m W Drummond |
| Carries | I 90 |
| Crosses | Antelope Creek |
| Coordinates | 46.70392, -113.34307 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 43.0 ft (13.1 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 20.0 ft (6.1 m) |
| Deck Area | 79.9 sq m |
| Main Spans | 2 |
| Year Built | 1971 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | I00090142+08784 |