The site is owned and operated by Rio Algom Ltd,[1] has been rehabilitated and is currently undergoing environmental monitoring.

[2] The Pronto mine is located on lot 3, concession II, Long township.

It is located 11 miles east of Blind River, it is near the Canadian Pacific Railway and highway 17.

[4] Messrs. Joubin and Hirshhorn, aided by staff from Preston East Dome gold mine, staked 1,400 claims and discovered more locations with uranium ore.[4] The summer 1953 publication of the success of Messrs. Joubin and Hirshhorn caused "the greatest staking rush in the history of Ontario" In 1954, after establishing the size of the find, a contract for the sale of the uranium to the value of $55 million was signed and Pronto Uranium Mines Limited was formed as a subsidiary company to operate the mine.

[4] 1958 the shaft was dug deeper to a seventh level and the treatment plant was upgraded to be able to process 1,500 tons per day.