1ST St Plankinton over Ck
Aurora County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 1ST St Plankinton over Ck in Aurora County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 2008, making it 17 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 29 of the 61 inventoried bridges in Aurora County rated fair (47.5%); 7 (11.5%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (43.71387, -98.47283)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Steel culvert |
| Length | about 33 ft |
| Location | East Edge of Plankinton |
| NBI structure number | 000000002164151 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Aurora County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I090 over Ck | 1965 | 9,890 | Fair |
| I090 W over Platte Ck | 1964 | 4,425 | Fair |
| I090 E over Platte Ck | 1964 | 4,425 | Fair |
| US281 over I090 | 1965 | 1,694 | Fair |
| US281 over Ck | 2007 | 1,434 | Good |
| US281 over West Br Firesteel Ck | 1959 | 1,284 | Fair |
All bridges nearby: Aurora County, SD bridge conditions · every bridge in Aurora County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.