S 89 over Blacktail Creek
Fair Condition43 years old1,804 vehicles/day
Location
| State | Montana |
| County | Beaverhead |
| Location | South Dillon |
| Carries | S 89 |
| Crosses | Blacktail Creek |
| Coordinates | 45.20490, -112.64847 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 98.1 ft (29.9 m) |
| Max Span | 95.1 ft (29 m) |
| Deck Width | 50.5 ft (15.4 m) |
| Deck Area | 460.5 sq m |
| Main Spans | 1 |
| Year Built | 1983 |
Traffic
| Avg Daily Traffic | 1,804 (2023) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 224 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00089000+03311 |