186TH Street over Foster Creek
Spink County, South Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 186TH Street over Foster Creek in Spink County, South Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1915, making it 110 years old at the 2025 inventory.
- It carries about 31 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 53 of the 176 inventoried bridges in Spink County rated poor (30.1%); 53 (30.1%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (44.68993, -98.10702)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 4 | Poor condition |
| Substructure | 3 | Serious condition |
Bridge details
| Structure | Steel through truss |
| Length | about 41 ft |
| Location | 4N & 0.4W Bloomfield |
| NBI structure number | 000000058296380 |
| Condition class | Poor |
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.