30950 461 Ave over Ck
Clay County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 30950 461 Ave over Ck in Clay 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 1930, making it 95 years old at the 2025 inventory.
- It carries about 25 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 41 of the 93 inventoried bridges in Clay County rated fair (44.1%); 14 (15.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 2024, on a 24-month routine inspection cycle.
- 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 → (42.90159, -96.98399)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 25 ft |
| Location | 12.5S 9.0E Irene Sd |
| NBI structure number | 000000014090125 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Clay County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD050 over Sd 50 Wl So Dak Owned R | 1981 | 5,147 | Good |
| SD050 over Vermillion Rv | 1981 | 5,147 | Fair |
| SD046 over Blind Ck | 2020 | 3,303 | Good |
| SD050 E over SD050 L | 1977 | 3,094 | Fair |
| SD019 over Vermillion Rv | 1997 | 2,764 | Good |
| SD019 over BNSF RR | 1997 | 2,764 | Good |
All bridges nearby: Clay County, SD bridge conditions · every bridge in Clay County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.