463rd Avenue over Big Sioux River
Fair Condition73 years old119 vehicles/day
Location
| State | South Dakota |
| County | Hamlin |
| Location | 2w & 1.6n Of Estelline |
| Carries | 463rd Avenue |
| Crosses | Big Sioux River |
| Coordinates | 44.59598, -96.94575 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 181.4 ft (55.3 m) |
| Max Span | 48.9 ft (14.9 m) |
| Deck Width | 26.2 ft (8 m) |
| Deck Area | 442.4 sq m |
| Main Spans | 4 |
| Year Built | 1953 |
Traffic
| Avg Daily Traffic | 119 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000029270144 |