Between 1953 and 1956, one hundred area prospects were opened, including one by one which developed into Greyhawk Mine.

[1] In 1954, Goldhawk Porcupine Mines Limited (who later became Goldhawk Uranium Mines Limited) undertook geology surveys, drilling to 450 feet deep.

[2][4] Over its two periods of operations, the mine produced 80,247 tons of uranium ore, of which 0.069% was U3O8[2] worth $834,899.

[3] In addition to uranium, the mine produced some of the world's best samples of Kainosite-(Y).

[5] 1978 and 1980 studies found that the natural weathering of the granite and gabbro rocks left on site has caused uranium leaching into the aquifer at concentrations ranging between 1.2 and 380 parts per billion, with higher concentrations measured deeper in the water table and in sediments.