The coal mine under Black Billy Head probably operated in the early 1900s.
Fill behind a stone retaining wall provided a level working area outside the adits. Coal was tipped into a chute to roll down the hill to the roadway where it could be loaded for transport.
Coal was brought from the adits via skips to a tipping platform. Skips would be placed on the platform, locked in place & emptied into the chute.
The roadway, the retaining wall, the tipping platform & a hinge, a water tank as well as much of the chute can still be seen at the mine site.
Blue Mountains National Park (NSW)