The Ogmore Valley eventually had many deep coal mines and numerous levels (drift mines). The deep pits included:
- Rhondda Main – sunk in 1914 and closed in 1924
- Aber – sunk in approx 1865, closure date unknown
- Penllwyngwent – sunk in 1905 and closed in 1969
- Wyndham – sunk in 1984 and closed in 1886
- Western – sunk in 1984 and closed in 1887
You can explore this map yourself on the Old-Maps website.