230 ST over Patterson Ck
Good Condition20 years old9 vehicles/day
Location
| State | South Dakota |
| County | Pennington |
| Location | 10.8e 2.0s N.underwood |
| Carries | 230 ST |
| Crosses | Patterson Ck |
| Coordinates | 44.06706, -102.60874 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 7 (Good) |
| Culvert | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 20.3 ft (6.2 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Area | 45.3 sq m |
| Main Spans | 2 |
| Year Built | 2006 |
Traffic
| Avg Daily Traffic | 9 (2022) |
| Truck Traffic | 31% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 922 |
| Inspection Frequency | Every 48 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000052719310 |