US 89 over Mill Coulee Creek
Fair Condition86 years old1,437 vehicles/day
Location
| State | Montana |
| County | Cascade |
| Location | 2m NE Sun River |
| Carries | US 89 |
| Crosses | Mill Coulee Creek |
| Coordinates | 47.55635, -111.75195 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 76.1 ft (23.2 m) |
| Max Span | 19.0 ft (5.8 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 211.1 sq m |
| Main Spans | 4 |
| Year Built | 1940 |
Traffic
| Avg Daily Traffic | 1,437 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00003011+00681 |