| 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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| 1884 | Spencer | | Colliery | Shaft | Eastern | Dunmore | Lackawanna | Andrew D. & Frank M. Spencer | 0 | NYS&W 1 | 0 | 55,070 | 109 | 272 | Lackawanna County Deed Book 20 page 468 | | 1885 | Spencer | | Colliery | Shaft | 1 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 87,896 | NYS&W 1 | 0 | 95,096 | 155 | 267 | | | 1886 | Spencer | | Colliery | Shaft | 1 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 75,829 | NYS&W 1 | 0 | 83,131 | 133 | 255 | | | 1887 | Spencer | | Colliery | Shaft | 1 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 110,437 | NYS&W 1 | 0 | 117,509 | 131 | 291 | | | 1888 | Spencer | | Colliery | Shaft | 1 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 138,558 | NYS&W 1 | 0 | 147,795 | 208 | 339 | | | 1889 | Spencer | | Colliery | Shaft | 1 | Dunmore | Lackawanna | Spencer Brothers | 115,152 | NYS&W 1 | 0 | 125,397 | 160 | 350 | | | 1890 | Spencer | | Colliery | Shaft | 1 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 132,000 | NYS&W 1 | 0 | 141,597 | 181 | 541 | | | 1891 | Spencer | | Colliery | Shaft | 2 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 134,915 | NYS&W 1 | 0 | 146,100 | 182 | 326 | | | 1892 | Spencer | | Colliery | Shaft | 2 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 128,969 | NYS&W 1 | 0 | 137,824 | 169 | 338 | | | 1893 | Spencer | | Colliery | Shaft | 2 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 0 | | 0 | 1,731 | 58 | 22 | | | 1894 | Spencer | | Colliery | Shaft | 2 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 72,073 | | 0 | 83,036 | 106 | 323 | | | 1895 | Spencer | | Colliery | Shaft | 2 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 90,694 | | 0 | 106,131 | 121 | 290 | | | 1896 | Spencer | | Colliery | Shaft | 2 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 102,500 | | 0 | 114,329 | 123 | 284 | | | 1897 | Spencer | | Colliery | Shaft | 2 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 86,147 | | 0 | 96,533 | 103 | 221 | | | 1898 | Spencer | | Colliery | Shaft | 2 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 72,743 | E&WV | 0 | 81,140 | 87 | 232 | | | 1899 | Spencer | | Colliery | Shaft | 2 | Dunmore | Lackawanna | A. D. & F. M. Spencer | 75,195 | E&WV | 0 | 81,583 | 110 | 167 | | | 1900 | Spencer | | Colliery | Shaft | 2 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 64,937 | E&WV | 0 | 71,169 | 89 | 206 | | | 1901 | Spencer | | Colliery | Shaft | 2 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 64,937 | E&WV | 0 | 102,669 | 125 | 216 | | | 1902 | Spencer | | Colliery | Shaft | 2 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 27,909 | E&WV | 0 | 30,815 | 33 | | | | 1903 | Spencer | | Colliery | No. 1 Shaft / No. 2 Shaft | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 73,200 | Erie | 0 | 78,200 | 108 | 202 | | | 1904 | Spencer | | Colliery | No. 1 Shaft / No. 2 Shaft | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 58,680 | Erie | 0 | 64,680 | 92 | 247 | | | 1905 | Spencer | | Colliery | No. 1 Shaft / No. 2 Shaft | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 64,775 | DL&W / Erie | 0 | 64,775 | 84 | 218 | | | 1906 | Spencer | | Colliery | Shaft | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 30,005 | Erie | 0 | 32,005 | 60 | 121 | | | 1907 | Spencer | | Colliery | Shaft | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 19,669 | DL&W / Erie | 0 | 19,669 | 56 | 96 | | | 1907 | Spencer | | Washery | | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 60,485 | DL&W / Erie | 0 | 64,485 | | | | | 1908 | Spencer | | Colliery | Shaft | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 5,730 | DL&W / Erie | 0 | 7,101 | 50 | 53 | | | 1908 | Spencer | | Washery | | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer | 72,239 | DL&W / Erie | 0 | 75,739 | 166 | 54 | | | 1909 | Spencer | | Colliery | Shaft | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer Coal Co. | 6,368 | Erie | 0 | 9,079 | 59 | 30 | | | 1909 | Spencer | | Washery | | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer Coal Co. | 89,708 | DL&W / Erie | 0 | 92,708 | 220 | 65 | | | 1910 | Spencer | | Colliery | Shaft | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer Coal Co. | 9,465 | DL&W / Erie | 0 | 12,255 | 194 | 102 | | | 1910 | Spencer | | Washery | | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer Coal Co. | 49,662 | DL&W / Erie | 0 | 52,923 | 182 | 54 | | | 1911 | Spencer | | Colliery | Shaft | 3 | Dunmore 1 | Lackawanna | A. D. & F. M. Spencer Coal Co. | 23,359 | DL&W / Erie | 0 | 32,007 | 112 | 126 | | | 1912 | Spencer | | Colliery | No. 1 Shaft / No. 2 Shaft | 3 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 47,122 | Erie | 0 | 56,624 | 234 | 285 | | | 1912 | Spencer | | Washery | | 3 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 0 | Erie | 0 | 0 | | | Data included with Spencer Colliery. | | 1913 | Spencer | | Colliery | No. 1 Shaft / No. 2 Shaft | 3 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 67,705 | Erie | 0 | 83,660 | 279 | 207 | | | 1914 | Spencer | | Colliery | No. 1 Shaft / No. 2 Shaft | 3 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 52,462 | Erie | 0 | 68,193 | 234 | 197 | | | 1915 | Spencer | | Colliery | No. 1 Shaft / No. 2 Shaft | 3 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 55,313 | Erie | 0 | 72,871 | 223 | 200 | | | 1916 | Spencer | | Colliery | No. 1 Shaft / No. 2 Shaft | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 16,103 | Erie | 0 | 18,103 | 134 | 150 | | | 1917 | Spencer | | Colliery | Shaft | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 24,212 | Erie | 0 | 21,212 | 252 | 64 | | | 1918 | Spencer | | Colliery | No. 1 Shaft | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 5,186 | Erie | 0 | 5,186 | 320 | 85 | | | 1918 | Spencer | | Washery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 87,029 | Erie | 0 | 87,412 | | | | | 1919 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 46,217 | Erie | 0 | 50,258 | 280 | 170 | | | 1920 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 55,409 | Erie | 0 | 62,292 | 267 | 170 | | | 1921 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 45,471 | Erie | 0 | 57,869 | 276 | 170 | | | 1922 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 38,681 | Erie | 0 | 52,451 | 161 | 199 | | | 1923 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 51,762 | Erie | 0 | 59,255 | 218 | 170 | | | 1924 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 44,884 | Erie | 0 | 57,119 | 240 | 184 | | | 1925 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 42,976 | Erie | 0 | 57,152 | 149 | 194 | | | 1926 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 54,883 | Erie | 0 | 77,248 | 260 | 196 | | | 1927 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 48,172 | Erie | 0 | 78,738 | 255 | 222 | | | 1928 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 51,631 | Erie | 0 | 76,342 | 237 | 209 | | | 1929 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 48,305 | Erie | 0 | 67,374 | 228 | 219 | | | 1930 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 46,626 | Erie | 0 | 69,010 | 232 | 194 | | | 1931 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 44,787 | | 0 | 72,789 | 207 | 223 | | | 1932 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 32,456 | | 0 | 60,400 | 148 | 233 | | | 1933 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 40,997 | | 0 | 89,814 | 172 | 302 | | | 1934 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 34,927 | | 0 | 77,008 | 159 | 269 | | | 1935 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 54,318 | Erie | 23,091 | 78,409 | 181 | 265 | | | 1936 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 20,374 | | 20,000 | 61,821 | 182 | 194 | | | 1937 | Spencer | | Colliery | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 19,876 | | 24,596 | 45,972 | 129 | 162 | | | 1938 | Spencer | | Mine | | 6 | Dunmore 1 | Lackawanna | Spencer Coal Co. | 15,460 | | 3,333 | 25,959 | 66 | 172 | Now operated by Harper Coal Co. |
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