| 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 |
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| 1933 | M&M | | Washery | | 7 | | Luzerne | Harrison Coal Co. | 35,539 | | 3,845 | 39,784 | 139 | 28 | Formerly Clover Coal Co. | | 1934 | Clifford | | Washery | | 7 | | Luzerne | Harrison Coal Co. | 68,538 | | 3,722 | 72,770 | 309 | 37 | | | 1935 | Clifford | | Washery | | 7 | | Luzerne | Harrison Coal Co. | 84,597 | | 0 | 85,757 | 290 | 24 | | | 1944 | Harrison | | Stripping | | 6 | | Luzerne | Harrison Coal Co. | 0 | Truck 1 | 3,816 | 3,816 | 51 | 10 | |
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