Alcorn Ridge Road over Polo Ck
Good Condition8 years old1,000 vehicles/day
Location
| State | South Dakota |
| County | Lawrence |
| Location | 0.9e Jct Us85s -spearfish |
| Carries | Alcorn Ridge Road |
| Crosses | Polo Ck |
| Coordinates | 44.48373, -103.72466 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 9 (Excellent) |
| Culvert | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 50.2 ft (15.3 m) |
| Max Span | 12.1 ft (3.7 m) |
| Deck Area | 149.9 sq m |
| Main Spans | 4 |
| Year Built | 2018 |
Traffic
| Avg Daily Traffic | 1,000 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000041163083 |