IRR Sd020 over Irish Ck
Good Condition51 years old125 vehicles/day
Location
| State | South Dakota |
| County | Ziebach |
| Location | 7.5 E Of Glad Valley |
| Carries | IRR Sd020 |
| Crosses | Irish Ck |
| Coordinates | 45.38584, -101.62578 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 7 (Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 157.5 ft (48 m) |
| Max Span | 56.1 ft (17.1 m) |
| Deck Width | 38.7 ft (11.8 m) |
| Deck Area | 566.4 sq m |
| Main Spans | 3 |
| Year Built | 1975 |
Traffic
| Avg Daily Traffic | 125 (2024) |
| Truck Traffic | 27% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000069195060 |