Believed
to be the first shaft in the Rhondda
valley, Walter Coffin sunk Dinas
Lower Colliery in 1812 near to
his Dinas levels, which date from
1809.
The
Dinas Middle Colliery was sunk
in 1832. The collieries were 560
yards apart and they worked the
No.3 Rhondda seam.
This
fine coking was known as "Coffins
celebrated Coal".
An explosion at Dinas in 1839
caused by the naked flame of a
candle igniting a pocket of firedamp
killed three miners.
Dinas Lower and Middle pits closed
in 1893.
