# List of collieries in the Rhondda Valleys

The Rhondda Valleys were, between 1860 and 1939, one of the world's most important coal mining regions. The list below attempts to show a complete list of levels and collieries opened within the Rhondda. A level is seen as a horizontal cut into a hill or mountain to access a seam of coal, while a colliery consists of shafts mined into the earth to reach seams of coal underground.

## List entries

Colliery states the name the colliery or level was known as when it first opened; many sites were enlarged, and some levels were developed into collieries. If a site was expanded from a level to a colliery, or significant additional shafts were added, the column Formerly draws attention to the original site name.
The Date opened records the first attempt to open a level or pit at the site, though often the level or colliery was abandoned without production due to problems; which including flooding, financing or failure to reach a seam. The Original owner category lists the person or organisation that first attempted to open the mine, though again they may not have been the first person or group to successfully extract coal from the site. The Closed date is the year where the colliery or level stopped extracting coal, though many mines were kept open as ventilation or pumping shafts after they became economically nonviable.
Men employed returns the numbers of workers at each mine at the colliery's peak. This does not reflect the tonnage of coal extracted, just the numbers of men working. Many dates reoccur as these are the years when the Inspector of Mines took official head counts.
| Number | Colliery | Formerly | Date opened | Original owner | Location | Closed | Men employed | Coal seam mined |
| 1 | Dinas Levels | | 1809 | Walter Coffin | Dinas | Unknown | Unknown | Rhondda No. 2 |
| 2 | Dinas Lower Colliery | | 1812 | Walter Coffin | Dinas | 1893 | Unknown | Rhondda No. 3 |
| 3 | Dinas Middle Colliery | | 1832 | Walter Coffin | Dinas | 1893 | Unknown | Rhondda No. 3 |
| 4 | Brithweunydd Level | | 1839 | Walter Coffin | Trealaw | Unknown | Unknown | Unknown |
| 5 | South Cymmer Level | | 1841 | Richard Lewis | Cymmer | Unknown | Unknown | Unknown |
| 6 | Nythbran Level | | 1844 | Lewis Edwards/George Gethin | Porth | Unknown | Unknown | Unknown |
| 7 | Cymmer Level | | 1844 | George Insole | Cymmer | Unknown | Unknown | Unknown |
| 8 | Gellifaelog Colliery | | 1845 | Walter Coffin | Tonypandy | Unknown | Unknown | Unknown |
| | Newbridge Colliery | | 1845 | John Calvert | Gelliwion, Pontypridd | 1897 | 486 (1896) | Rhondda No. 3 |
| 9 | Porth Colliery | | 1845 | David W. James | Porth | Unknown | Unknown | Unknown |
| 10 | Troedyrhiw (Aber Rhondda) Colliery | | 1845 | Leonard Hadley | Ynyshir | 1901 | 130 (1896) | Rhondda No. 3 |
| 11 | Ynyshir House | | 1845 | Shepherd & Evans | Ynyshir | 1909 | 55 (1908) | Rhondda No. 2 |
| 12 | Perch Levels | | 1847 | William Perch | Blaenclydach | Unknown | Unknown | Rhondda No. 2 |
| 13 | Cymmer (Old) Colliery | | 1847 | George Insole & Son | Cymmer | 1940 | 780 (1918) | Rhondda No. 3 |
| 14 | Coedcae Colliery | | 1850 | Edward Mills | Trehafod | 1935 | 585 (1923) | Rhondda No. 3 |
| 15 | Hafod (Lewis Merthyr) | | 1850 | D. & J. Thomas | Trehafod | 1983 | 3288 (1918) | Two foot, Five feet, Six feet, Nine feet, Red, Gellideg |
| 16 | Llwyncelyn Colliery | | 1851 | David W. James | Porth | 1895 | Unknown | Unknown |
| 17 | Rhondda Merthyr (Bute) Colliery | | 1851 | Marquess of Bute | Treherbert | 1926 | 801 (1918) | Seven feet |
| 18 | Upper Cymmer Colliery | | 1851 | J.H. Insole | Cymmer | ≤1918 | 182 (1896) | Unknown |
| 19 | Glynfach Colliery | | 1851 | Issac Williams | Porth | Unknown | Unknown | Unknown |
| 20 | Tynewydd Colliery | | 1852 | Cope, Lewis & Thomas | Porth | 1901 | 118 (1896) | Rhondda No. 3 |
| 21 | Lady Margaret Colliery | | 1853 | Marquess of Bute | Treherbert | 1940s | 1053 (1938) | Six feet, Seven feet, Gorllwyn |
| 22 | New Cymmer Colliery | | 1855 | J.H. Insole | Porth | 1940 | 1636 (1923) | Five feet, Nine feet, Gellideg |
| 23 | Ellis Level | | 1855 | Richard Ellis | Porth | Unknown | Unknown | Unknown |
| 24 | Tylecoch Colliery | | 1855 | J.Carr, Morrsion & Co. | Treorchy | 1930 | Unknown | Unknown |
| 25 | Dunraven Levels | | 1856 | Philip Taylor | Blaencwm | ≤1930 | 478 (1918) | Rhondda No. 2 |
| 26 | Gelligaled Colliery | | 1856 | V. L. Lewis | Ystrad | Unknown | Unknown | Unknown |
| 27 | Tyntyla Level | | 1856 | Robert Parsons | Ystrad | Unknown | Unknown | Unknown |
| 28 | Bodringallt Level | | 1856 | D. Jones & D. James | Ystrad | Unknown | Unknown | Unknown |
| 29 | Blaenllechau Colliery | | 1857 | D. Davies | Blaenllechau | 1959 | Unknown | Unknown |
| 30 | Pentre Level | | 1857 | Edward Curtis | Pentre | Unknown | Unknown | Unknown |
| 31 | Church Level | | 1857 | Edward Curtis | Pentre | Unknown | Unknown | Unknown |
| 32 | Penygraig Drift | | 1857 | Thomas Ellis | Penygraig | Unknown | Unknown | Unknown |
| 33 | Dunraven Level | | 1858 | Thomas Joseph | Blaencwm | Unknown | Unknown | Unknown |
| 34 | Graig Level | | 1858 | Thomas Jones | Blaencwm | Unknown | Unknown | Unknown |
| 35 | Penygraig Level | | 1858 | M. Rowlands | Penygraig | 1919 | 220 (1896) | Rhondda No. 3 |
| 36 | Cynllwyn Du Colliery | | 1858 | Thomas Wayne | Tylorstown | 1936 | | Gellideg seam |
| 37 | Ynysfeio Colliery | | 1859 | Troedyrhiw Colliery Coal Co. | Treherbert | 1930s | 1382 (1923) | Gorllwyn, Four Foot, Five Foot, Seven Foot |
| 38 | Llwynypia Level | | 1859 | Isaac Smith | Llwynypia | Unknown | Unknown | Unknown |
| 39 | Abergorchy Level | | 1859 | Huxham, Hopkin & Morgan | Treorchy | 1935 | 2278 (1908) | Rhondda No. 3 |
| 40 | Glyncoli Level | | 1860 | C James | Treorchy | Unknown | Unknown | Unknown |
| 41 | Bwllfa Level | | 1862 | Richardson & Carr | Ton Pentre | Unknown | Unknown | Unknown |
| 42 | Brithweunydd Level | | 1862 | Daniel Thomas | Trealaw | Unknown | Unknown | Unknown |
| 43 | Glamorgan (Llwynypia) Colliery (No. 1 & 2) | | 1863 | Glamorgan Coal Co. | Llwynypia | 1945 | Unknown | Rhondda No. 2 and No. 3 |
| 44 | Blaenclydach Colliery | | 1863 | Bush & Co. | Blaenclydach | 1947 | 606 (1923) | Pentre seam |
| 45 | Pentre Colliery | Pentre Level | 1864 | Curteis, Greenhill & Ware | Pentre | 1929 | 1190 (1908) | Five feet, Yard seam, Bute seam |
| 46 | Bodringallt Colliery | | 1864 | Warner, Simpson & Co. | Ystrad | 1936 | 930 (1896) | Six feet, Nine feet, Two feet, Red seam |
| 47 | Cwmclydach Colliery | | 1864 | D. & E. Thomas | Cwmclydach | c. 1895 | Unknown | Unknown |
| 48 | Tydraw Colliery | Dunraven Level | 1865 | Thomas Joseph | Blaencwm | 1959 | 1049 (1923) | Four feet, Five feet, Six feet, Gorllwyn, Yard seam |
| 49 | Tynewydd Colliery | | 1865 | Ebenezer Lewis | Tynewydd | 1911 | Unknown | Number 2, Four and Six feet |
| 50 | Parc Colliery | | 1865 | D. Davies & Partners | Cwmparc | 1966 | 2000+ (1945) | Two feet Nine, Six feet, Garw, New seam |
| 51 | Maendy (Maindy) Colliery | | 1865 | D. Davies & Partners | Ton Pentre | 1948 | 1155 (1896) | Two feet Nine, Seven feet, Bute, New seam |
| 52 | Adare Colliery | | 1866 | Daniel Thomas | Penygraig | Unknown | Unknown | Unknown |
| 53 | Ynyswen Level | | 1869 | Morgan Jones | Treorchy | Unknown | Unknown | Unknown |
| 54 | Dinas Colliery | | 1869 | Daniel Thomas | Dinas | Unknown | Unknown | Unknown |
| 55 | Blaenrhondda (Dunraven) Colliery | | 1869 | Cardiff & Merthyr Steam Co. | Blaenrhondda | 1920s | 386 (1908) | Rhondda No. 2 |
| 56 | Gelli Colliery | | 1870 | E. Thomas & G. Griffiths | Gelli | 1962 | 905 (1908) | Seven feet, Five feet, Yard seam, Pentre seam |
| 57 | Dare Colliery | | 1870 | D. Davies and Co. | Cwmparc | 1966 | 1121 (1923) | Six feet, Three feet Ten, Red seam, Brunt, Little |
| 58 | Trealaw (Llwynypia No. 3) Colliery | | 1872 | | Trealaw | ≤1918 | Unknown | Rhondda No. 3 |
| 59 | Glynmoch Colliery | | 1872 | | Treorchy | Unknown | Unknown | Unknown |
| 60 | Fernhill Colliery | | 1872 | Ebenezer Lewis | Blaenrhondda | 1978 | 1712 (1938) | Gorllwyn, Four feet, Two Feet Nine |
| 61 | Clydach Vale (Cambrian) Colliery (No. 1) | | 1872 | S. Thomas & J. Riches | Clydach Vale | 1965 | 1933 (1923) | Pentre seam, Five feet, Coronation |
| 62 | Llwynypia Colliery (No. 4 & 5) | | 1872 | Glamorgan Coal Co. | Llwynypia | Unknown | Unknown | Unknown |
| 63 | Pendyrys Colliery | | 1874 | Tylor Colliery Co. | Tylorstown | 1936 | | |
| 64 | Clydach Vale (Cambrian) Colliery (No. 2) | | 1874 | Samuel Thomas & J. Riches | Clydach Vale | 1965 | 1253 (1923) | Nine feet |
| 65 | Mardy Colliery | | 1875 | M. Jones & W. Cobb | Maerdy | 1985 | 2024 (1918) | Four, Five, Six and Nine feet, Red, Abagorki, Gorllwyn, New and Bute seams |
| 66 | Standard Colliery | | 1875 | Ynyshir Steam Coal Co. | Ynyshir | 1968 | 1454 (1908) | Four foot |
| 67 | Tynybedw Colliery | | 1876 | E. Thomas & G. Griffiths | Pentre | 1933 | 787 (1908) | Nine feet, Seven feet |
| 68 | Eastern Colliery | | 1877 | D. Davies & Co. | Pentre | 1948 | 923 (1923) | Bute seam, Lower seam |
| 69 | Cymmer Colliery | Cymmer (Old) Colliery | 1877 | G. Insole & Son | Porth | 1940 | 2331 (1914) | Five feet, Nine feet, Hafod seam, Gellideg seam |
| 70 | Pandy Colliery (Naval No. 1) | | 1879 | Naval Colliery Co. | Tonypandy | 1958 | 699 (1896) | Pentre |
| 71 | National Colliery (Cwch) | | 1880 | M. Cope & H. Tennet | Wattstown | 1968 | 1500 (1905) | Nine feet, Five feet, Gellideg |
| 72 | Ely Colliery (Naval No. 2) | | 1880 | New Naval Colliery Co. | Penygraig | c. 1928 | 699 (1896) | Nine feet, Bute, Pentre |
| 73 | Dinas Colliery | | 1881 | Dinas Steam Coal Co. | Dinas | Unknown | Unknown | Unknown |
| 74 | Merthyr Navigation | Hafod | 1881 | William Thomas Lewis | Trehafod | 1983 | 3844 | Five feet, Six feet, Nine feet, Gellideg, Red seam, Two foot Nine |
| 75 | Clydach Vale (Cambrian) Colliery (No. 3) | | 1891 | Cambrian Colliery Co, | Clydach Vale | 1936 | Unknown | Pentre seam, Five feet, Coronation |
| 76 | Nantgwyn Colliery (Naval No. 3) | | 1892 | Naval Colliery Co, | Penygraig | ≤1945 | 1333 (1923) | Four feet, Six feet, Nine Feet, Bute seam |
| 77 | Hendrewen (Glenrhondda) Colliery | | 1899 | Glenavon Garw Colliery Co. | Blaencwm | 1966 | 434 (1923) | Rhondda No. 2, Gorllwyn |
| 78 | Lady Lewis Colliery | | 1904 | Lewis MErthyr Consolidated Collieries Co, | Ynyshir | 1930s | 1265 (1923) | Two feet Nine, Four feet, Six feet, Nine feet, Red |
| 79 | Anthony Colliery (Naval No. 4) | | 1910 | Naval Colliery Co, | Tonypandy | 1958 | Unknown | Pentre seam |