| 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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| 1870 | Hartford | No. 6 | Colliery | | Middle | near Ashley 1 | Luzerne | Wilkes-Barre Coal & Iron Co. | 0 | | 0 | 0 | | 187 | Called Ashley No. 6 on some maps but not in the inspection reports. | | 1871 | Hartford | No. 6 | Colliery | | Middle | near Ashley | Luzerne | Wilkes-Barre Coal & Iron Co. | 0 | | 0 | 0 | | 278 | | | 1872 | Hartford | No. 6 | Colliery | | Middle | near Ashley | Luzerne | Wilkes-Barre Coal & Iron Co. | 0 | | 0 | 0 | | | | | 1875 | Hartford | No. 6 | Colliery | Slope / Tunnel | Middle | near Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 0 | | 0 | 116,193 | | 546 | | | 1876 | Hartford | No. 6 | Colliery | Slope | Middle | near Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 0 | | 0 | 118,257 | 140 | 140 | | | 1878 | Hartford | No. 6 | Colliery | | Middle | near Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 16,948 | | 0 | 0 | 19 | | Total production not individualy reported. | | 1879 | Hartford | No. 6 | Colliery | | Middle | near Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 186,184 | | 0 | 0 | 192 | 588 | Total production not reported. | | 1880 | Hartford | No. 6 | Colliery | Slopes | Middle | near Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 0 | | 0 | 203,675 | 184 | 580 | | | 1881 | Hartford | No. 6 | Colliery | Slopes | Middle | near Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 0 | | 0 | 213,155 | 231 | 567 | | | 1882 | Hartford | No. 6 | Colliery | Slopes | Middle | near Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 0 | | 0 | 216,762 | 231 | 609 | | | 1883 | Hartford | No. 6 | Colliery | Slopes | Middle | near Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 0 | | 0 | 207,664 | 211 | 700 | | | 1884 | Hartford | No. 6 | Colliery | | Middle | near Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 0 | Lehigh & Susquehanna | 0 | 67,580 | 123 | 430 | | | 1885 | Hartford | No. 6 | Colliery | | 3 | near Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 0 | Lehigh & Susquehanna | 0 | 116,098 | 173 | 517 | | | 1886 | Hartford | No. 6 | Colliery | | 3 | Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 141,307 | Lehigh & Susquehanna | 0 | 145,172 | 189 | 504 | | | 1887 | Hartford | No. 6 | Colliery | | 3 | Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 119,039 | | 0 | 123,118 | 184 | 478 | | | 1888 | Jersey | No. 8 | Colliery | | 3 | Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 127,872 | | 0 | 133,579 | 215 | 468 | | | 1889 | Jersey | No. 8 | Colliery | | 3 | Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 102,174 | | 0 | 107,566 | 149 | 447 | Name listed as "New Jersey" on report. | | 1890 | Jersey | No. 8 | Colliery | | 3 | Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 64,767 | | 0 | 69,630 | 113 | 376 | May 15 - Gas explosion kills 26. | | 1891 | Jersey | No. 8 | Colliery | | 4 | Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 128,600 | | 0 | 134,912 | 185 | 425 | | | 1892 | Jersey | No. 8 | Colliery | | 4 | Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 102,581 | | 0 | 108,473 | 167 | 391 | | | 1893 | Jersey | No. 8 | Colliery | | 4 | Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 100,907 | | 0 | 106,211 | 153 | 552 | | | 1894 | Jersey | No. 8 | Colliery | | 4 | Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 81,882 | | 0 | 87,074 | 117 | 416 | | | 1895 | Jersey | No. 8 | Colliery | | 4 | Ashley | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 102,963 | | 0 | 127,520 | 129 | 499 | | | 1899 | Jersey Annex | No. 8 | Colliery | | 4 | Ashley 1 | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 5,005 | | 0 | 7,405 | 19 | 22 | | | 1900 | Jersey Annex | No. 8 | Colliery | | 4 | Ashley 1 | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 63,106 | | 0 | 63,106 | 196 | 35 | | | 1901 | Jersey Annex | No. 8 | Colliery | | 4 | Ashley 1 | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 81,835 | CNJ | 0 | 81,835 | 179 | 32 | | | 1902 | Jersey Annex | No. 8 | Colliery | | 4 | Ashley 1 | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 49,650 | CNJ | 0 | 53,621 | 153 | 38 | | | 1903 | Jersey | | Washery | | 7 | Ashley 1 | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 64,321 | CNJ | 0 | 64,321 | 213 | 37 | | | 1904 | Jersey | | Washery | | 7 | Ashley 1 | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 91,543 | CNJ | 0 | 91,543 | 256 | 36 | | | 1905 | Jersey | | Washery | | 7 | Ashley 1 | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 90,302 | CNJ | 0 | 94,538 | 249 | 40 | | | 1906 | Jersey | | Washery | | 7 | Ashley 1 | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 71,074 | CNJ | 0 | 74,685 | 215 | 36 | | | 1907 | Jersey | No. 8 | Washery | | 7 | Ashley 1 | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 44,025 | CNJ | 0 | 48,475 | | 17 | | | 1908 | Jersey | No. 8 | Washery | | 7 | Ashley 1 | Luzerne | Lehigh & Wilkes-Barre Coal Co. | 12,406 | CNJ | 0 | 14,834 | | 20 | |
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