| Year | Operation Name | Number | Type | Opening | District | City | County | Company Name | Railroad Shipments (tons) | Railroad to Mine | Truck Shipments (tons) | Total Production (tons) | Days Worked | Employees | Notes |
|---|
| 1899 | Plymouth Mountain | | Colliery | | 4 | Plymouth 1 | Luzerne | Delaware & Hudson Canal Co. | 0 | D&H | 0 | 0 | | 54 | Idle. | | 1901 | Plymouth Mountain | | Colliery | | 4 | Plymouth 1 | Luzerne | Delaware & Hudson Canal Co. | 0 | D&H | 0 | 0 | 174 | 65 | |
|