| 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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| 1934 | Northwest | | Colliery | | 1 | Simpson 1 | Lackawanna | D. F. M. Coal Co. | 11,973 | | 36,217 | 48,411 | 37 | | | | 1935 | Northwest | | Mine | | 2 | Simpson 1 | Lackawanna | Northwest Coal Co. | 36,047 | | 21,485 | 63,396 | 283 | 97 | | | 1936 | Northwest | | Mine | | 2 | Simpson 1 | Lackawanna | Northwest Coal Co. | 76,874 | | 0 | 76,874 | 229 | 120 | | | 1938 | MBS | | Mine | | 6 | | Lackawanna | M. B. S. Coal Co. | 0 | Truck 1 | 927 | 927 | 58 | 17 | Coal prepared by Ace Coal Co. | | 1939 | MBS | | Mine | | 6 | | Lackawanna | M. B. S. Coal Co. | 0 | Truck 1 | 7,121 | 7,121 | 190 | 19 | | | 1939 | MBS | | Stripping | | 6 | | Lackawanna | M. B. S. Coal Co. | 0 | Truck 1 | 725 | 725 | 26 | 3 | | | 1940 | MBS | | Mine | | 6 | | Lackawanna | M. B. S. Coal Co. | 0 | Truck 1 | 11,243 | 11,243 | 151 | 23 | | | 1941 | MBS | | Mine | | 6 | | Lackawanna | M. B. S. Coal Co. | 0 | Truck 1 | 12,406 | 12,406 | 186 | 18 | | | 1942 | MBS | | Mine | | 6 | | Lackawanna | M. B. S. Coal Co. | 2,351 | | 7,054 | 9,405 | 186 | 15 | | | 1942 | Northwest | | Mine | | 6 | Simpson 1 | Lackawanna | Northwest Coal Co. | 1,563 | | 0 | 1,563 | 42 | 36 | Formerly operated by M. B. S. Coal Co. | | 1943 | Northwest | | Mine | | 1 | Simpson 1 | Lackawanna | Simoncelli Coal Co. | 0 | Truck 1 | 2,043 | 2,043 | 103 | 9 | |
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