| 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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| 1938 | Harper | | Mine | | 6 | Dunmore 1 | Lackawanna | Harper Coal Co. | 0 | Truck 1 | 12,078 | 12,078 | 79 | 0 | Formerly operated by Spencer Coal Co. Coal prepared by Drinker Coal Co. | | 1939 | Harper | | Mine | | 6 | Dunmore 1 | Lackawanna | Harper Coal Co. | 9,906 | | 0 | 9,906 | 61 | 66 | | | 1939 | Harper | | Mine | | 6 | Dunmore 1 | Lackawanna | James Harper Co. | 4,939 | | 0 | 4,939 | 43 | 35 | Part of mine operated by Harper Coal Co. | | 1940 | Harper | | Mine | | 6 | Dunmore 1 | Lackawanna | James Harper Co. | 0 | | 0 | 7,583 | 83 | 8 | Part of mine operated by Harper Coal Co. | | 1941 | Harper | | Mine | | 6 | Dunmore 1 | Lackawanna | James Harper Co. | 2,694 | | 0 | 3,848 | 201 | 8 | Part of mine operated by Harper Coal Co. | | 1942 | Harper | | Mine | | 6 | Dunmore 1 | Lackawanna | James Harper Co. | 3,657 | | 3,050 | 9,143 | 161 | 7 | Part of mine operated by Harper Coal Co. | | 1943 | Harper | | Mine | | 3 | Dunmore 1 | Lackawanna | James Harper Coal Co. | 726 | | 1,089 | 1,815 | 190 | 5 | Part of mine operated by Harper Coal Co. Transferred from 6th District. |
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