| Location | |
|---|---|
  McClean Lake Mine Location in Saskatchewan Show map of Saskatchewan McClean Lake Mine McClean Lake Mine (Canada) Show map of Canada | |
| Location | Athabasca Basin |
| Province | Saskatchewan |
| Country | Canada |
| Coordinates | 58°15′40″N103°48′09″W / 58.26111°N 103.80250°W /58.26111; -103.80250 |
| Production | |
| Products | Uranium |
| History | |
| Discovered | 1979 |
| Opened | 1999 |
| Owner | |
| Company | Orano (77.5%),Denison Mines (22.5%) |
| Year of acquisition | 1979 (Discovery) |
TheMcClean Lake mine is auranium mine and milling operation located west ofWollaston Lake, about 700 kilometres north ofSaskatoon, in theAthabasca Basin region ofSaskatchewan, Canada.[1] The McClean ore body was discovered in 1979, followed by the discovery of the JEB ore body in 1982. From 1985 to 1990, a cluster of deposits named Sue A, Sue B, and Sue C were discovered.
Production from the JEB and Sue C open pits commenced in 1999. Upon depletion, the JEB pit was converted to a Tailings Management Facility (TMF). The Sue C pit will be converted to a TMF for the disposal of waste from the McLean Lake andCigar Lake operations. Production from the Sue A mine and development of the Sue E mine, commenced in mid-2005.
After the tailings from the milling operations and waste rock from the mining operations are chemically treated to precipitatearsenic andnickel they are pumped into the TMF. There they form a consolidated mass of much lower permeability than the surroundingsandstone. As a result, thegroundwater flow is diverted around the tailings. By these means the water quality in adjacent Fox and Pat Lakes is expected to be maintained within Saskatchewan Surface Water Quality Objectives over the long term (10,000 years). This expectation has to be confirmed by monitoring subject to oversight by theCanadian Nuclear Safety Commission (CNSC).[citation needed]
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