| Lat / long: | 41.87721, -93.82242 |
| Primary: | Clay |
| Operation type: | Surface |
| Development status: | Past Producer |
| MAS | 190150030 |
| DEP | 10266817 |
| Reference | {Deposit:: TOWN OF MADRID IS POINT OF REFERENCE}{Deposit:: L. L. WHEELER ALSO OPERATES A YARD IN THIS VICINITY}{Deposit:: IOWA GEOLOGICAL SURVEY, ANNUAL REPORT 1895, VOL 5, P 228} |
| Reporter | Igs / Mm |