| 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 |
|---|
| 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. |
Note 1: Added, does not appear in the mine inspection report.
