SD025 over West Fork Vermillion Rv
Miner County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SD025 over West Fork Vermillion Rv in Miner 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 1953, making it 72 years old at the 2025 inventory.
- It carries about 762 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 25 of the 63 inventoried bridges in Miner County rated fair (39.7%); 19 (30.2%) 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 → (44.13883, -97.55107)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 31 ft |
| Location | 3.9 S Kingsbury Co Line |
| NBI structure number | 000000049150040 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Miner County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD034 over West Fork Vermillion Rv | 1987 | 2,168 | Good |
| SD034 over Rock Ck | 1986 | 1,462 | Good |
| SD034 over Ck | 2023 | 970 | Good |
| SD034 over Ck | 2023 | 970 | Good |
| SD025 over Rock Ck | 1976 | 485 | Fair |
| 435 Ave over West Fork Vermillion Rv | 2020 | 336 | Good |
All bridges nearby: Miner County, SD bridge conditions · every bridge in Miner County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.