Rhondda Mining disasters Mining disasters in the Rhondda Valley 1850 - 1965

| Colliery | Location_ | Date_ | Year_ | Death_toll | cause |
|---|---|---|---|---|---|
| Dinas Colliery | Dinas | 1 January | 1844 | 12 | gas explosion |
| Cymmer Colliery | Cymmer | 15 July | 1856 | 112 | gas explosion |
| Ferndale No. 1 Pit | Blaenllechau | 8 November | 1867 | 178 | gas explosion |
| Ferndale No. 1 Pit | Blaenllechau | 10 June | 1869 | 53 | gas explosion |
| Pentre Colliery | Pentre | 24 February | 1871 | 38 | gas explosion |
| Tynewydd Colliery | Porth | 11 April | 1877 | 5 | flooding |
| Dinas Middle Colliery | Dinas | 13 January | 1879 | 63 | gas explosion |
| Naval Colliery | Penygraig | 10 December | 1880 | 101 | gas explosion |
| Gelli Colliery | Gelli | 21 August | 1883 | 5 | gas explosion |
| Naval Colliery | Penygraig | 27 January | 1884 | 14 | gas explosion |