| 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 |
|---|
| 1936 | Mrochka | | Mine | | 2 | | Lackawanna | Paul Mrochka Coal Co. | 2,750 | | 1,419 | 5,615 | 277 | 14 | | | 1937 | Mrochka | | Mine | | 2 | | Lackawanna | Paul Mrochka Coal Co. | 0 | Truck 1 | 464 | 464 | 24 | 12 | |
|