405TH Ave over Fordham Creek
Spink County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 405TH Ave over Fordham Creek in Spink County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1940, making it 85 years old at the 2025 inventory.
- It carries about 11 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 100 of the 176 inventoried bridges in Spink County rated fair (56.8%); 53 (30.1%) 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 → (45.00673, -98.12556)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 51 ft |
| Location | 7.9N & 1W Doland |
| NBI structure number | 000000058290161 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Spink County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US281 over Turtle Ck | 1963 | 2,141 | Fair |
| US281 over Snake Ck | 1978 | 2,141 | Fair |
| US281 over BNSF RR | 1998 | 1,891 | Fair |
| US212 over Turtle Ck | 2017 | 1,638 | Fair |
| US212 over James Rv | 1968 | 1,554 | Fair |
| US212 over Timber Ck | 2007 | 1,202 | Good |
All bridges nearby: Spink County, SD bridge conditions · every bridge in Spink County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.