Humboldt, SD Mines
Mines in Humboldt, South Dakota
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Highway Gravel Pit | Private | Sand and Gravel | ||
| Highway Pit | Unknown | Sand and Gravel | ||
| Hillcrest Pit | Unknown | Sand and Gravel | ||
| Swift Gravel Pit | Private | Sand and Gravel |
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