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Dyno Mine is a decommissioned underground uranium mine located at Cardiff, near Farrel Lake, approximately 30km southwest of Bancroft, Ontario. It operated from 1958 to 1960.
Mining commenced in 1958 via a 525 meter deep shaft. There was a mill on site.
The mine produced to 363,758 kg of Uranium trioxide before closing in 1960 when ore supplies were depleted.
In 1981, ownership transferred to International Mogul Mines Limited. Rehabilitation work was undertaken by AEC West Consultants in 2006. In 2022, EWL Management Limited dissolved into its parent company Ovintiv Canada ULC, and ownership therefore shifted to Ovintiv.
Environmental monitoring by the Canadian Nuclear Safety Commission found no safety risks.
On May 6, 2022, CNSC took regulatory action against Ovintiv. Ovintiv absorbed EWL Management Limited on February 22, 2022 and assumed responsibilities for the mine, but not updated any of the licensing documentation to reflect the change. Using powers of the Nuclear Safety and Control Act, CNSC issued an order for Ovintiv to comply with the licensing requirements previously issued to EWL Management Limited. Order under section 35 or Paragraph 37(2)(f) of the Nuclear Safety and Control Act, 6 May 2022, Canadian Nuclear Safety Commission
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