| 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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| 1937 | Ridgewood | | Colliery | | 14 | Plains Twp. 1 | Luzerne | Ridgewood Coal Co. | 1,671 | | 0 | 1,731 | 151 | 37 | | | 1938 | Ridgewood | | Colliery | | 14 | Plains Twp. 1 | Luzerne | Ridgewood Coal Co. | 1,000 | | 0 | 1,000 | 40 | 55 | |
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