IRR BIA RTE 121 over Big Spring Creek
Good Condition8 years old75 vehicles/day
Location
| State | South Dakota |
| County | Roberts |
| Location | 18.2 Km SW Of Sisseton |
| Carries | IRR BIA RTE 121 |
| Crosses | Big Spring Creek |
| Coordinates | 45.49692, -97.04061 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 7 (Good) |
| Culvert | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 20.3 ft (6.2 m) |
| Max Span | 20.3 ft (6.2 m) |
| Deck Width | 24.3 ft (7.4 m) |
| Deck Area | 45.9 sq m |
| Main Spans | 1 |
| Year Built | 2018 |
Traffic
| Avg Daily Traffic | 75 (2024) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 24 months |
| Owner | Bureau of Indian Affairs |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0000A09347B0105 |