Aka Groffdale Mill
| 1758 | Peter Graaf (Groff) |
| 1770 | Adrian Groff |
| 1772 | Magdalin Groff |
| 1801 | Abraham Groff built current mill |
| 1811 | Abraham Groff estate |
| 1899 | George Martin |
| 1925 | Martin Weaver |
Currently part of MM Weaver Farm Equipment, the mill is located at 169 North Groffdale Road, Leola, PA.
| Built | c1801 |
| Structure | 2.5 Story Stone |
| Water Source | Groff’s Run |
| Township | West Earl |
| Type | Flour/Grist/Saw |
| Headrace | 1,000 feet |
| Tailrace | 50 feet |
| Power | 1 Overshot |
| Capacity | 8 bbl / day |