| 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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| 1940 | Westminster | | Washery | | 10 | | Luzerne | Westminster Washery | 2,172 | | 0 | 2,242 | 65 | 6 | New operation. |
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