161st Avenue over Boxelder Ck
Fair Condition53 years old780 vehicles/day
Location
| State | South Dakota |
| County | Pennington |
| Location | 0.6s New Underwood |
| Carries | 161st Avenue |
| Crosses | Boxelder Ck |
| Coordinates | 44.08849, -102.83418 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 81.0 ft (24.7 m) |
| Max Span | 39.0 ft (11.9 m) |
| Deck Width | 30.8 ft (9.4 m) |
| Deck Area | 232.2 sq m |
| Main Spans | 3 |
| Year Built | 1973 |
Traffic
| Avg Daily Traffic | 780 (2022) |
| Truck Traffic | 12% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000052608295 |