I090 W over Big Ck I90 Wf
Good Condition55 years old3,720 vehicles/day
Location
| State | South Dakota |
| County | Lyman |
| Location | 2.2 W Oacoma Interch |
| Carries | I090 W |
| Crosses | Big Ck I90 Wf |
| Coordinates | 43.81677, -99.43042 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 196.9 ft (60 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 40.7 ft (12.4 m) |
| Deck Area | 744 sq m |
| Main Spans | 3 |
| Year Built | 1971 |
Traffic
| Avg Daily Traffic | 3,720 (2024) |
| Truck Traffic | 29% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000043466261 |