Winthrop, IA Mines
Mines in Winthrop, Iowa
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Cook Pit | Maudlin Const. Co. | Unknown | Sand and Gravel | |
| Huffman Pit | Paul Niemann Const. Co. | Unknown | Sand and Gravel | |
| Unknown | Unknown | Sand and Gravel | ||
| Unknown | Unknown | Sand and Gravel |