Aka Conowingo Furnace
| 1768 | Jacob & Elizabeth Barr |
| 1776 | Jacob Bear |
| 1800 | Jonathan Good |
| 1809 | Michael Withers built Conowingo Furnace |
| 1810 | John & George Withers |
| 1828 | James Hopkins Sr. buys Conowingo Furnace |
| 1850 | First mill torn down |
| 1861 | James M. Hopkins has a mill at Conowingo Furnace |
| 1866 | Conowingo Furnace ceases operations |
| 1868 | James M. Hopkins built new mill |
| 1899 | Jacob Tome estate |
| 1969 | Used as a sawmill |
| 19?? | Tanglewood Golf Course |
The mill is located at 600 Scotland Road, Quarryville, PA.
| Built | 1868 |
| Structure | 4.5 Story Stone |
| Water Source | Conowingo Creek |
| Township | East Drumore |
| Type | Grist, Flour, Saw |
| Head race | 1,000 feet |
| Tailrace | 1,000 feet |
| Dam Height | 6 feet |
| Power | 2 Turbines, 1 Overshot |
| Capacity | 8 bbls / day |