| 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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| 1879 | Enterprise | | Colliery | Shaft | Middle | Plains Twp. | Luzerne | H. C. Roberts & Co. | 0 | | 0 | 100,000 | 190 | 266 | | | 1880 | Enterprise | | Colliery | Shaft | Middle | Plains Twp. | Luzerne | H. C. Roberts & Co. | 0 | | 0 | 106,113 | 168 | 292 | | | 1881 | Enterprise | | Colliery | Shaft | Middle | Plains Twp. | Luzerne | H. C. Roberts & Co. | 0 | | 0 | 137,930 | 219 | 326 | |
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