Madrid, IA Mines
Mines in Madrid, Iowa
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| G. Eckert Yard | Unknown | Clays | ||
| Gast Pit | Hallett Construction Co. | Unknown | Sand and Gravel | |
| Hodges Pit | Place Brothers | Unknown | Sand and Gravel | |
| S N Wilson | Ray Cook | Unknown | Sand and Gravel | |
| Unknown | Unknown | Sand and Gravel | ||
| Unknown | Unknown | Sand and Gravel | ||
| Unknown | Unknown | Clays |