The Gunnar Mine near Uranium City was once the largest uranium mine in the world. (Image Credit: Chris Carr/CKOM)

By Susan McNeil

Licence renewal

Remediation to continue at former Gunnar uranium mine and mill

May 20, 2026 | 12:53 PM

The federal nuclear regulator has renewed the Saskatchewan Research Council’s licence to continue remediation work at the former Gunnar uranium mine and mill site in northern Saskatchewan for another five years.

The Canadian Nuclear Safety Commission announced Wednesday that the renewed licence is valid until May 31, 2031.

The Gunnar site is located near Lake Athabasca, about 25 kilometres southwest of Uranium City and roughly 600 kilometres north of Saskatoon.

The Saskatchewan Research Council will continue ongoing cleanup work at the decommissioned uranium mine, which operated from 1955 to 1963 before closing in 1964 with little decommissioning completed at the time.

The CNSC said the renewed licence does not authorize any new activities at the site.

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During the five-year licence period, the research council plans to complete remediation work, finalize long-term monitoring plans and update site-specific management plans.

Any future transition to long-term monitoring would require a separate licensing hearing and decision by the commission.

The CNSC said it considered written submissions and perspectives gathered during a public hearing process held in spring 2026 before making its decision.

The Gunnar site is located on Treaty 8 territory and within the traditional territories of the Denesųłiné, Cree and Métis.

by Susan McNeil

Remediation to continue at former Gunnar uranium mine and mill

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