| 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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| 1872 | Grassy Island | | Colliery | Shaft | Eastern | Blakely Twp. | Luzerne | Delaware & Hudson Canal Co. | 0 | | 0 | 152,499 | | 334 | | | 1873 | Grassy Island | | Colliery | Shaft | Eastern | Blakely Twp. | Luzerne | Delaware & Hudson Canal Co. | 0 | | 0 | 144,471 | | 341 | | | 1874 | Grassy Island | | Colliery | Shaft | Eastern | Blakely Twp. | Luzerne | Delaware & Hudson Canal Co. | 0 | | 0 | 112,186 | | 371 | | | 1875 | Grassy Island | | Colliery | Shaft | Eastern | Blakely Twp. | Luzerne | Delaware & Hudson Canal Co. | 0 | | 0 | 153,724 | | 319 | | | 1876 | Grassy Island | | Colliery | Shaft | Eastern | Olyphant | Luzerne | Delaware & Hudson Canal Co. | 77,939 | | 0 | 81,008 | 134 | 341 | | | 1877 | Grassy Island | | Colliery | Shaft | Eastern | Olyphant | Luzerne | Delaware & Hudson Canal Co. | 0 | | 0 | 86,703 | 140 | 357 | | | 1878 | Grassy Island | | Colliery | Shaft | Eastern | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 0 | | 0 | 88,803 | 143 | 347 | | | 1879 | Grassy Island | | Colliery | Shaft | Eastern | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 0 | | 0 | 147,194 | 211 | 360 | | | 1880 | Grassy Island | | Colliery | Shaft | Eastern | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 0 | | 0 | 125,795 | 189 | 353 | | | 1881 | Grassy Island | | Colliery | Shaft | Eastern | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 0 | | 0 | 142,283 | | 359 | | | 1882 | Grassy Island | | Colliery | Shaft | Eastern | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 0 | | 0 | 119,612 | 236 | 318 | | | 1883 | Grassy Island | | Colliery | Shaft | Eastern | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 0 | | 0 | 119,210 | 246 | 295 | | | 1884 | Grassy Island | | Colliery | Shaft | Eastern | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 0 | D&H Canal | 0 | 115,582 | 206 | 341 | | | 1885 | Grassy Island | | Colliery | Shaft | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 124,435 | D&H Canal | 0 | 134,832 | 210 | 353 | | | 1886 | Grassy Island | | Colliery | Shaft | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 100,903 | D&H Canal | 0 | 112,417 | 186 | 271 | | | 1887 | Grassy Island | | Colliery | Shaft | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 35,586 | | 0 | 45,627 | 82 | 351 | | | 1888 | Grassy Island | | Colliery | Shaft | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 169,268 | | 0 | 188,132 | 252 | 387 | | | 1889 | Grassy Island | | Colliery | Shaft / Drift | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 164,532 | | 0 | 176,763 | 235 | 400 | | | 1890 | Grassy Island | | Colliery | Shaft / Drift | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 145,292 | | 0 | 159,629 | 210 | 418 | | | 1891 | Grassy Island | | Colliery | Shaft / Drift | 2 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 150,601 | | 0 | 162,099 | 222 | 421 | | | 1892 | Grassy Island | | Colliery | Shaft / Slope 1 | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 161,602 | | 0 | 164,811 | 234 | 418 | | | 1893 | Grassy Island | | Colliery | Shaft / Slope 1 | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 186,961 | | 0 | 203,868 | 222 | 413 | | | 1894 | Grassy Island | | Colliery | Shaft / Slope 1 | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 183,803 | | 0 | 186,719 | 188 | 428 | | | 1895 | Grassy Island | | Colliery | Shaft / Slope 1 | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 222,767 | | 0 | 225,806 | 228 | 479 | | | 1896 | Grassy Island | | Colliery | Shaft / Slope 1 | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 223,438 | | 0 | 266,648 | 220 | 465 | | | 1897 | Grassy Island | | Colliery | Shaft / Slope 1 | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 190,977 | | 0 | 193,708 | 204 | 468 | | | 1898 | Grassy Island | | Colliery | Shaft / Slope 1 | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 179,482 | D&H | 0 | 198,328 | 186 | 474 | | | 1899 | Grassy Island | | Colliery | Shaft / Slope 1 | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 0 | D&H | 0 | 12,877 | 194 | 426 | | | 1899 | Grassy Island | | Washery | | 1 | Olyphant | Lackawanna | Delaware & Hudson Canal Co. | 85,598 | D&H | 0 | 85,598 | 216 | 28 | | | 1900 | Grassy Island | | Washery | Shaft / Slope 1 | 1 | Olyphant | Lackawanna | Delaware & Hudson Co. | 97,607 | D&H | 0 | 97,607 | 177 | 425 | | | 1900 | Grassy Island | | Colliery | | 1 | Olyphant | Lackawanna | Delaware & Hudson Co. | 0 | D&H | 0 | 0 | 191 | 30 | | | 1901 | Grassy Island | | Colliery | Shaft / Slope 1 | 1 | Olyphant | Lackawanna | Delaware & Hudson Co. | 0 | D&H | 0 | 0 | 232 | 455 | | | 1901 | Grassy Island | | Washery | | 1 | Olyphant | Lackawanna | Delaware & Hudson Co. | 63,257 | D&H | 0 | 63,257 | 117 | 33 | | | 1902 | Grassy Island | | Colliery | Shaft / Slope 1 | 1 | Olyphant 1 | Lackawanna | Delaware & Hudson Co. | 0 | D&H | 0 | 0 | | 425 | | | 1902 | Grassy Island | | Washery | | 1 | Olyphant 1 | Lackawanna | Delaware & Hudson Co. | 91,594 | D&H | 0 | 95,694 | 206 | 53 | | | 1903 | Grassy Island | | Colliery | Shaft / Slope | 2 | Olyphant 1 | Lackawanna | Delaware & Hudson Co. | 0 | D&H | 0 | 0 | 257 | 484 | Production included with Olyphant No. 2 | | 1903 | Grassy Island | | Washery | | 2 | Olyphant 1 | Lackawanna | Delaware & Hudson Co. | 131,052 | D&H | 0 | 134,552 | 184 | 49 | | | 1904 | Grassy Island | No. 1 | Colliery | Shaft (Idle) / Slope | 2 | Olyphant 1 | Lackawanna | Delaware & Hudson Co. | 0 | D&H | 0 | 0 | | 457 | Coal prepared at Olyphant No. 2 breaker. | | 1904 | Grassy Island | | Washery | | 2 | Olyphant 1 | Lackawanna | Delaware & Hudson Co. | 74,299 | D&H | 0 | 83,122 | 192 | 45 | | | 1905 | Grassy Island | | Washery | | 2 | Olyphant 1 | Lackawanna | Delaware & Hudson Co. | 40,456 | D&H | 0 | 47,756 | 200 | 37 | | | 1906 | Grassy Island | | Washery | | 2 | Olyphant 1 | Lackawanna | Delaware & Hudson Co. | 36,515 | D&H | 0 | 43,815 | 149 | 49 | | | 1907 | Grassy Island | | Washery | | 2 | Olyphant 1 | Lackawanna | Delaware & Hudson Co. | 71,118 | D&H | 0 | 146,299 | | 49 | | | 1908 | Grassy Island | | Washery | | 2 | Olyphant 1 | Lackawanna | Delaware & Hudson Co. | 300 | D&H | 0 | 620 | 11 | 13 | | | 1919 | Grassy Island | | Washery | | 6 | Olyphant 1 | Lackawanna | Staples & Bell Inc., and Dexter & Carpenter Inc. | 22,586 | D&H | 0 | 22,586 | 140 | 64 | | | 1920 | Grassy Island | | Washery | | 6 | Olyphant 1 | Lackawanna | Dexter & Carpenter Inc. | 0 | | 0 | 0 | | | Idle. | | 1963 | Erie Grassy | | Stripping | | 1 | | Lackawanna | Halsey Contracting Co. | 0 | | 0 | 1,621 | 266 | 10 | | | 1965 | Grassy Island | 110-2 | Stripping | | 1 | Olyphant 1 | Lackawanna | C. B. M. Coal Co. | 620 | | 650 | 2,503 | 40 | 3 | Coal prepared at Pompey and Ace breakers. | | 1966 | Grassy Island | 78-6A | Stripping | | 1 | Olyphant 1 | Lackawanna | C. & S. Excavating Co. | 17,471 | | 1,583 | 31,835 | 232 | 13 | Coal prepared at Pompey Breaker. | | 1966 | Grassy Island | 110-2 | Stripping | | 1 | Olyphant 1 | Lackawanna | C. B. M. Coal Co. | 357 | | 132 | 1,319 | 70 | 3 | Coal prepared at Pompey and Ace breakers. | | 1967 | Grassy Island | 78-6A | Stripping | | 1 | Olyphant 1 | Lackawanna | C. & S. Excavating Co. | 4,527 | | 514 | 10,319 | 93 | 0 | Coal prepared at Pompey and Penbrook breakers. | | 1967 | Grassy Island | 78-7 | Stripping | | 1 | Olyphant 1 | Lackawanna | C. & S. Excavating Co. | 704 | | 1,041 | 3,061 | 169 | 8 | Coal prepared at Raymond Breaker. | | 1968 | Grassy Island | 78-7 | Stripping | | 1 | Olyphant 1 | Lackawanna | C. & S. Excavating Co. | 115 | | 145 | 532 | 22 | 0 | Coal prepared at Raymond Breaker. |
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