Otho, IA Clays Mines
Clays Mines in Otho, Iowa
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Johnston Clay Works | Roll, Inc. | Unknown | Clays | |
| Kalo Brick and Tile Co. | Kalo Brick And Tile Co | Unknown | Clays | |
| Vincent Clay Products Co. | Vincent Clay Products Co. | Unknown | Clays |