| 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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| 1949 | Masters | | Stripping | | 1 | Kingsley 2 | Lackawanna | Masters Coal Co. | 17,802 | | 0 | 17,802 | 145 | 19 | Discontinued operation in August. Coal prepared at Powderly Breaker. | | 1956 | Masters | | Stripping | | 1 | | Lackawanna | Masters Contracting Co. | 6,642 | | 0 | 66,642 | 270 | 9 | Coal prepared at multiple breakers. | | 1957 | Masters | | Stripping | | 1 | | Lackawanna | Masters Contracting Co. | 4,803 | | 3,180 | 7,983 | 302 | 8 | Coal prepared at Bolands and Northwest breakers. |
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