Sadly, the distillery no longer produces whisky, but it is still open to the public thanks to the heroic efforts of Historic Scotland.
The distillery rarely had an easy time, but it was Dallas Dhu's unreliable water supply that finally saw its demise; the supply even dried up entirely for a while during the drought of 1976. The works limped on, thanks to its use as a testing station for new variations in the production process, but the end finally came in 1983. The last barrel was filled on 16 March 1983, an event recorded on the filling store wall.
The whisky that you taste at the end of the tour is around 30 years old - but the supply will not last for ever. It is becoming a very rare whisky!