McClean Lake Mill
Project information
As at 31 December 2025
Description
As at 31 December 2025
The McClean Lake uranium processing facility is owned by the MLJV (Denison 22.5%, Orano 77.5%) and operated by Orano Canada. Located on the eastern edge of the Athabasca Basin ~750 km north of Saskatoon, the mill is specially designed and constructed to process high-grade uranium ores using sulphuric acid + hydrogen peroxide leaching and solvent-extraction recovery. Ancillary on-site infrastructure includes a sulphuric acid plant, a ferric sulphate plant, an oxygen plant, an electricity transmission line, 14 MW back-up diesel power plant, warehouses, shops, offices and accommodation. In 2016 the CNSC authorised an expansion that raised licensed annual capacity from 13 Mlb U3O8 to 24 Mlb U3O8 to accommodate up to 18 Mlb/yr from the Cigar Lake mine; expansion was funded entirely by the CLJV. The mill toll-mills 100% of Cigar Lake production and processed 2025 SABRE McClean North ore. To process future Gryphon ore, modifications are required: leaching circuit expansion, additional filtration, additional tailings thickener, acid plant expansion.
Processing facilities
Multiple effective dates
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Royalties & streams
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