On the morning of October 21, 1966, a landslide of coal waste
crashed into a small Welsh mining village, killing 116 children
and 28 adults. The accident left just five survivors and wiped
out half the town’s youth. The Aberfan disaster became one
of the UK’s worst coal mining accidents.

The landslide sent 140,000 cubic yards of coal waste in a tidal
wave 40-feet high hurtling down the mountainside where Merthyr
Vale Colliery stood, destroying farmhouses, cottages, houses
and part of the neighboring County Secondary School.

The avalanche is thought to have been the result of shoddy
construction and a build-up of water in one of the colliery’s
spoil tips—piles of waste material removed during mining.