Port Austin, MI Mines
Mines in Port Austin, Michigan
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Grind Stone City Sandstone Quarry | Private | Sand and Gravel |
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Grind Stone City Sandstone Quarry | Private | Sand and Gravel |