The large main adit is adjacent to the prominent Klondyke Mill at the base of the Geirionydd Gorge. The level has been driven along three parallel N-S lodes although no stoping was undertaken. This abridged story from MOTGF is too good not to include:

The Klondyke Fraud

It seems that during the period 1918 to 1921, the Klondyke was the scene of a massive fraud. The story is related in some detail in Mines of the Gwydyr Forest, but briefly what happened was this. A certain Joseph Aspinall took over the mine in 1918 and claimed to have discovered a huge vein of silver. What he did was to clean the passages of dirt, purchase 20 tons of powdered lead concentrate and glue it onto the walls giving the impression that the entire passage passed through a huge vein of silver. He then bought parties up from London to view the vein and procure an investment in the venture. A mass of miners were employed who actually did no work, let alone any mining. Whenever Aspinall turned up with a viewing party, a hoot of his car horn triggered the miners to busy themselves around the premises - some guarding the adit with cudgels, others running around the place like ants on an ant hill. By the time he was rumbled, he managed to secure £166,000 ! He got 22 months.