| 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 |
|---|
| 1887 | Glenwood | | Colliery | Shaft | 1 | Glenwood | Lackawanna | Hillside Coal & Iron Co. | 0 | | 0 | 0 | | 122 | Sinking shaft and building breaker. |
| 1888 | Glenwood | | Colliery | Shaft | 1 | Mayville Borough | Lackawanna | Hillside Coal & Iron Co. | 107,362 | | 0 | 112,996 | 206 | 373 | |
| 1889 | Glenwood | | Colliery | No. 1 Shaft / No. 2 Shaft | 1 | Mayville Borough | Lackawanna | Hillside Coal & Iron Co. | 231,007 | | 0 | 245,607 | 186 | 551 | |
| 1890 | Glenwood | | Colliery | No. 1 Shaft / No. 2 Shaft | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 208,107 | | 0 | 216,319 | 176 | 483 | |
| 1891 | Glenwood | | Colliery | No. 1 Shaft / No. 2 Shaft | 2 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 267,663 | | 0 | 278,911 | 244 | 482 | |
| 1892 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 269,875 | | 0 | 281,929 | 250 | 581 | |
| 1893 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 179,620 | | 0 | 195,074 | 174 | 511 | |
| 1894 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 189,431 | | 0 | 203,175 | 179 | 490 | |
| 1895 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 140,188 | | 0 | 154,249 | 164 | 431 | |
| 1896 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 123,099 | | 0 | 134,643 | 143 | 434 | |
| 1897 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 112,825 | | 0 | 123,983 | 133 | 448 | |
| 1898 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 89,273 | New York, Lake Erie and Western Railroad | 0 | 100,816 | 116 | 409 | |
| 1899 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 96,184 | | 0 | 107,124 | 132 | 363 | |
| 1900 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 83,617 | D&H | 0 | 93,434 | 119 | 294 | |
| 1901 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield | Lackawanna | Hillside Coal & Iron Co. | 41,813 | D&H | 0 | 60,035 | 57 | 270 | |
| 1901 | Glenwood | | Washery | | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 33,844 | D&H | 0 | 33,844 | 182 | 11 | |
| 1902 | Glenwood | | Colliery | Shaft 1 | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 36,717 | Erie | 0 | 59,548 | 61 | 238 | |
| 1902 | Glenwood | | Washery | | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 28,990 | Erie | 0 | 31,456 | 201 | 11 | |
| 1903 | Glenwood | | Colliery | Shaft | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 86,420 | D&H | 0 | 110,728 | 128 | 239 | |
| 1903 | Glenwood | | Washery | | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 5,328 | D&H | 0 | 5,328 | 83 | 11 | |
| 1904 | Glenwood | | Colliery | Shaft | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 76,500 | D&H | 0 | 97,377 | 130 | 298 | |
| 1905 | Glenwood | | Colliery | Shaft | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 70,081 | D&H | 0 | 91,294 | 147 | 269 | |
| 1906 | Glenwood | | Colliery | Shaft | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 63,497 | Erie | 0 | 89,104 | 137 | 267 | |
| 1907 | Glenwood | | Colliery | Shaft | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 80,438 | Erie | 0 | 105,730 | 189 | 296 | |
| 1908 | Glenwood | | Colliery | Shaft | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 67,933 | Erie | 0 | 93,166 | 175 | 250 | |
| 1909 | Glenwood | | Colliery | Shaft (abandoned) | 1 | Mayfield 1 | Lackawanna | Hillside Coal & Iron Co. | 19,273 | Erie | 0 | 29,000 | 60 | 259 | |
| 1927 | Glenwood | | Washery | | 2 | Mayfield 1 | Lackawanna | Lackawanna Valley Fuel Co. | 2,950 | NYO&W | 0 | 5,658 | 90 | 8 | |
| 1928 | Glenwood | | Washery | | 2 | Mayfield 1 | Lackawanna | Lackawanna Valley Fuel Co. | 20,358 | NYO&W | 0 | 20,358 | 226 | 9 | |
Note 1: Added, does not appear in the mine inspection report.
