450th Avenue over Lake St. John Outlet
Fair Condition96 years old324 vehicles/day
Location
| State | South Dakota |
| County | Hamlin |
| Location | 2.6s Of Lake Norden |
| Carries | 450th Avenue |
| Crosses | Lake St. John Outlet |
| Coordinates | 44.54916, -97.20914 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 7 (Good) |
| Culvert | 5 (Fair) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 29.9 ft (9.1 m) |
| Max Span | 10.5 ft (3.2 m) |
| Deck Width | 33.1 ft (10.1 m) |
| Deck Area | 91.9 sq m |
| Main Spans | 2 |
| Year Built | 1930 (reconstructed 1979) |
Traffic
| Avg Daily Traffic | 324 (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 | 000000029140176 |