I090 W over Spearfish Ck
Fair Condition55 years old5,322 vehicles/day
Location
| State | South Dakota |
| County | Lawrence |
| Location | 0.3 W US 85 Interch |
| Carries | I090 W |
| Crosses | Spearfish Ck |
| Coordinates | 44.52054, -103.86718 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 153.9 ft (46.9 m) |
| Max Span | 63.0 ft (19.2 m) |
| Deck Width | 40.7 ft (12.4 m) |
| Deck Area | 581.6 sq m |
| Main Spans | 3 |
| Year Built | 1971 |
Traffic
| Avg Daily Traffic | 5,322 (2024) |
| Truck Traffic | 12% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 125 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000041091058 |