| Business | Phone |
| Green Mountain Slate Co Inc Middle Granville 12849 | (518) 642-1050 |
| Rising & Nelson Slate Co Slyboro Rd, Middle Granville 12849 | (518) 642-3333 |
| Ritchie Brothers 146 State Route 22a, Middle Granville 12849 | (518) 642-2400 |
| Sheldon Slate Co Middle Granville 12849 | (518) 642-1561 |