State Highway 47 over Big Bend Dam Spillway
Fair Condition63 years old676 vehicles/day
Location
| State | South Dakota |
| County | Buffalo |
| Location | 1 Mi. So. Of Ft. Thompson |
| Carries | State Highway 47 |
| Crosses | Big Bend Dam Spillway |
| Coordinates | 44.06080, -99.45388 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 134.8 ft (41.1 m) |
| Max Span | 16.1 ft (4.9 m) |
| Deck Width | 12.1 ft (3.7 m) |
| Deck Area | 152.1 sq m |
| Main Spans | 9 |
| Year Built | 1963 |
Traffic
| Avg Daily Traffic | 676 (2022) |
| Truck Traffic | 32% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 24 months |
| Owner | Corps of Engineers |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | CEPMROSD0000008 |