28830 421 Ave. over South Br Lonetree Ck
Fair Condition87 years old69 vehicles/day
Location
| State | South Dakota |
| County | Hutchinson |
| Location | 9.6e & 1.3s Tripp |
| Carries | 28830 421 Ave. |
| Crosses | South Br Lonetree Ck |
| Coordinates | 43.20849, -97.77626 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 36.4 ft (11.1 m) |
| Max Span | 16.1 ft (4.9 m) |
| Deck Width | 27.2 ft (8.3 m) |
| Deck Area | 92.1 sq m |
| Main Spans | 2 |
| Year Built | 1939 |
Traffic
| Avg Daily Traffic | 69 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Structure Number | 000000034170203 |