Replacement of the Stanleigh Mine treatment facility

Environment assessment (EA) start date: January 19, 2006
Type: Screening
CEAR reference number: 06-01-17079
Proponent: Rio Algom Ltd.
Location: Elliot Lake, Ontario

Latest update

• March 9, 2007 – The Canadian Nuclear Safety Commission (CNSC) announces decision on screening EA for the proposed replacement of Rio Algom Limited's Stanleigh Effluent Treatment Plant near Elliot Lake, Ontario
• December 15, 2006 – Request for public comment – Draft screening report – Proposed replacement of the Stanleigh Effluent Treatment Facility at the Stanleigh Mine Site, Elliot Lake, Ontario
• April 25, 2006 – CNSC announces decision on EA guidelines for the proposed replacement of Rio Algom Ltd.'s Stanleigh Effluent Treatment Plant

Project description

Rio Algom Ltd. has proposed to replace the existing sand filtration treatment plant located at the Stanleigh Mine with a system similar to those used at the Quirke, Panel, Nordic and Pronto sites. The project involves demolishing the existing treatment plant, construction of a new water treatment plant, the construction of a settling pond, and the construction of a settling pond dam and spillway. The project also includes the operation of these newly constructed physical works.

Before the Commission makes its decision on the proposal, an EA must be completed in compliance with the Canadian Environmental Assessment Act. The purpose of an EA is to identify the possible environmental effects of a proposed project, and to determine whether these effects can be mitigated before the project is allowed to proceed.

Further information

CNSC maintains a public registry of documents related to its environmental assessments. Lists and copies of documents may be obtained upon request. For questions or information directly related to this environmental assessment, contact the CNSC.

The CNSC regulates the use of nuclear energy and materials to protect health, safety, security and the environment, and to implement Canada's international commitments on the peaceful use of nuclear energy; and to disseminate objective scientific, technical and regulatory information to the public.