Dyno Mine

Uranium was first discovered in the area of Cardiff in 1922 by W. M. Richardson. Between 1953 and 1956, one hundred area prospects were opened, including one by Paul Mulliette of Toronto who discovered uranium in 1953, which was developed into Dyno Mine.{{Cite book|last=Reynolds|first=Nila|title=Bancroft. A Bonanza of Memories|publisher=Bancroft Centennial Committee|year=1979|pages=192}}{{Cite book|last=A.H. Lang, J. W. Griffith, H. R Steacy|url=https://emrlibrary.gov.yk.ca/gsc/economic_geology_series/16-1962/egs_16.pdf|title=Canadian Deposits of Uranium and Thorium|publisher=Geological Survey of Canada - Department of Mines and Technical Surveys|year=1962|location=Yukon University|pages=175}}

In 1956, brush was cleared to create 200 houses in Cardiff, some for executives of nearby Bicroft Mine and a settlement called Dyno Estates was built near Ontario Highway 28 for executives of Dyno Mine. Other construction quickly followed, including, two single-men's bunkhouses, a canteen, an eleven-room school, an ice-curling rink, and a recreation center. In 1957, a swimming pool was started.{{Cite web|last=Voisin|first=Stella|date=28 July 2007|title=Report on The Caring for Kids in Cardiff Research Project|url=http://fayandassociates.com/pdf/cardiff.pdf|url-status=live|website=Fay And Associates|archive-url=https://web.archive.org/web/20211124232751/http://fayandassociates.com/pdf/cardiff.pdf |archive-date=2021-11-24 }}

Mining commenced in 1958 via a 525 meter deep shaft. There was a mill on site.

The mine produced to 363,758 kg of U₃0₈{{Cite web|title=Dyno Mine, Cardiff Township, Haliburton County, Ontario, Canada|url=https://www.mindat.org/loc-10846.html|access-date=2021-11-24|website=www.mindat.org}} before closing in 1960 when ore supplies were depleted.

After the closure, the tailing site attracted mineral collectors, especially to the annual Bancroft Rockbound Gemboree in which tourists travelled to Bancroft in search of gems and minerals.

In 1981, ownership transferred to International Mogul Mines Limited.{{Cite web|title=Mineral Deposit Inventory Record MDI31D16NE00032: Canadian Dyno, Dyno Mine, International Mogul|url=http://www.geologyontario.mndm.gov.on.ca/mndmfiles/mdi/data/records/MDI31D16NE00032.html|access-date=2021-11-24|website=www.geologyontario.mndm.gov.on.ca}} Rehabilitation work was undertaken by AEC West Consultants in 2006.{{Cite web|last=Kneen|first=Jamie|date=30 Nov 2006|title=Uranium Mining in Canada – Past and Present. Background notes for a presentation to the Indigenous World Uranium Summit|url=https://miningwatch.ca/sites/default/files/uranium_canada_0.pdf|url-status=live|website=Mining Watch Canada|archive-url=https://web.archive.org/web/20211124230541/https://miningwatch.ca/sites/default/files/uranium_canada_0.pdf |archive-date=2021-11-24 }} In 2022, EWL Management Limited dissolved into its parent company Ovintiv Canada ULC, and ownership therefore shifted to Ovintiv.{{Cite web |last= |first= |date=2020-09-21 |title=Independent Environmental Monitoring Program: Dyno, Bicroft, and Madawaska Mines |url=https://nuclearsafety.gc.ca/eng/resources/maps-of-nuclear-facilities/iemp/dyno-bicroft-madawaska-mines.cfm?pedisable=true |url-status=live |archive-url=https://web.archive.org/web/20211124203003/https://nuclearsafety.gc.ca/eng/resources/maps-of-nuclear-facilities/iemp/dyno-bicroft-madawaska-mines.cfm?pedisable=true |archive-date=2021-11-24 |access-date=2021-11-24 |website=Canadian Nuclear Safety Commission |language=en}}{{Cite web |last= |date=2022-05-19 |title=Regulatory Action – Ovintiv Canada ULC |url=http://nuclearsafety.gc.ca/eng/acts-and-regulations/regulatory-action/ovintiv-canada-ulc.cfm |access-date=2022-06-23 |website=Canadian Nuclear Safety Commission |language=en}}

Environmental monitoring by the Canadian Nuclear Safety Commission found no safety risks.{{Cite web |title=3 decommissioned uranium mines near Bancroft, Ont. deemed protected, no health impacts: study - Peterborough {{!}} Globalnews.ca |url=https://globalnews.ca/news/7366368/bancroft-uranium-mine-safety/ |access-date=2021-11-24 |website=Global News |language=en-US}}{{Cite web|date=2020-10-06|title=Sampling near old mine sites finds 'no expected health impacts'|url=https://haliburtonecho.ca/sampling-near-old-mine-sites-finds-no-expected-health-impacts/|access-date=2021-11-24|website=Haliburton Echo|language=en-CA}}{{Cite web|last=Smith-Millar|first=Trevor|date=2020-10-15|title=Old Uranium Mines in Bancroft Area Deemed Safe|url=https://www.mybancroftnow.com/49355/old-uranium-mines-in-bancroft-area-deemed-safe/|access-date=2021-11-24|website=My Bancroft Now|language=en-CA}}

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.{{Cite web |last= |date=2022-05-19 |title=Regulatory Action – Ovintiv Canada ULC |url=http://nuclearsafety.gc.ca/eng/acts-and-regulations/regulatory-action/ovintiv-canada-ulc.cfm |access-date=2022-11-13 |website=Canadian Nuclear Safety Commission |language=en}} 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.[https://www.nuclearsafety.gc.ca/eng/pdfs/Regulatory_Action/2022/2022-05-06-Order_Issued_to_Ovintiv_-Madawaska_Dyno_Order_Web%20Ready.pdf Order under section 35 or Paragraph 37(2)(f) of the Nuclear Safety and Control Act], 6 May 2022, Canadian Nuclear Safety Commission

• Uranium mining in the Bancroft area
• Uranium ore deposits
• List of uranium mines
• Uranium mining
• List of mines in the Bancroft area

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Category:Uranium mines in Ontario

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Category:Ovintiv