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Dyno Mine

Mine headframe, 1956
Location
Dyno MineLocation in Cardiff Township, OntarioShow map of Haliburton CountyDyno MineDyno Mine (Southern Ontario)Show map of Southern OntarioDyno MineDyno Mine (Ontario)Show map of Ontario
Location	Cardiff, Ontario
Province	Ontario
Country	Canada
Coordinates	44°57′0″N 78°5′52″W / 44.95000°N 78.09778°W / 44.95000; -78.09778
Production
Products	Uranium oxide
Production	363,758 kg
History
Opened	1958
Closed	1960
Owner
Company	Ovintiv

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.

Uranium discovery - 1922 to 1956

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.

Mine operations - 1956 to 1960

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.

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 before closing in 1960 when ore supplies were depleted.

Post mining - 1960 to present day

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. 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.

See also

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

References

1. ^ Reynolds, Nila (1979). Bancroft. A Bonanza of Memories. Bancroft Centennial Committee. p. 192.
2. A.H. Lang, J. W. Griffith, H. R Steacy (1962). Canadian Deposits of Uranium and Thorium (PDF). Yukon University: Geological Survey of Canada - Department of Mines and Technical Surveys. p. 175.{{cite book}}: CS1 maint: multiple names: authors list (link)
3. ^ Voisin, Stella (28 July 2007). "Report on The Caring for Kids in Cardiff Research Project" (PDF). Fay And Associates. Archived (PDF) from the original on 2021-11-24.
4. ^ "Dyno Mine, Cardiff Township, Haliburton County, Ontario, Canada". www.mindat.org. Retrieved 2021-11-24.
5. "Mineral Deposit Inventory Record MDI31D16NE00032: Canadian Dyno, Dyno Mine, International Mogul". www.geologyontario.mndm.gov.on.ca. Retrieved 2021-11-24.
6. Kneen, Jamie (30 Nov 2006). "Uranium Mining in Canada – Past and Present. Background notes for a presentation to the Indigenous World Uranium Summit" (PDF). Mining Watch Canada. Archived (PDF) from the original on 2021-11-24.
7. "Independent Environmental Monitoring Program: Dyno, Bicroft, and Madawaska Mines". Canadian Nuclear Safety Commission. 2020-09-21. Archived from the original on 2021-11-24. Retrieved 2021-11-24.
8. "Regulatory Action – Ovintiv Canada ULC". Canadian Nuclear Safety Commission. 2022-05-19. Retrieved 2022-06-23.
9. "3 decommissioned uranium mines near Bancroft, Ont. deemed protected, no health impacts: study - Peterborough | Globalnews.ca". Global News. Retrieved 2021-11-24.
10. "Sampling near old mine sites finds 'no expected health impacts'". Haliburton Echo. 2020-10-06. Retrieved 2021-11-24.
11. Smith-Millar, Trevor (2020-10-15). "Old Uranium Mines in Bancroft Area Deemed Safe". My Bancroft Now. Retrieved 2021-11-24.
12. ^ "Regulatory Action – Ovintiv Canada ULC". Canadian Nuclear Safety Commission. 2022-05-19. Retrieved 2022-11-13.
13. Order under section 35 or Paragraph 37(2)(f) of the Nuclear Safety and Control Act, 6 May 2022, Canadian Nuclear Safety Commission

• Uranium mines in Ontario
• Underground mines in Canada
• Former mines in Ontario
• History of Haliburton County
• EWL Management Limited
• Ovintiv