Four Corners Road over Cheyenne Rv
Haakon County, South Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Four Corners Road over Cheyenne Rv in Haakon County, South Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1930, making it 95 years old at the 2025 inventory.
- It carries about 45 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 8 of the 69 inventoried bridges in Haakon County rated poor (11.6%); 8 (11.6%) 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 → (44.52052, -101.99221)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 5 | Fair condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Steel through truss |
| Length | about 1,520 ft |
| Location | 15.7W 4.4N Milesvill |
| NBI structure number | 000000028003156 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Haakon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US014 over Ck | 1955 | 978 | Fair |
| US014 over Ck | 1955 | 978 | Fair |
| US014 over North Fork Bad Rv | 1995 | 978 | Fair |
| SD073 over West Plum Ck | 1990 | 700 | Fair |
| SD073 over Grindstone Ck | 1954 | 700 | Fair |
| US014 over Ck | 1954 | 660 | Fair |
All bridges nearby: Haakon County, SD bridge conditions · every bridge in Haakon County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.