This consultation closes at 11:59 p.m. on:
October 27, 2025
Proposal summary
This proposal is for an amendment to Environmental Compliance Approval No. 2290-CAVKGN for industrial sewage works serving the Rainy River Mine located at 5967 Highway 11/71, in the Township of Emo, Ontario.
Location details
Site address
ON
Canada
Site location details
Rainy River Mine is located in the Municipality of Chapple, approximately 50 km north of Emo, Ontario.
Site location map
The location pin reflects the approximate area where environmental activity is taking place.
View this location on a map opens link in a new windowProponent(s)
New Gold Inc.
5967 Highway 11/71
Emo,
ON
P0W 1E0
Canada
Proposal details
This proposal is for an amendment to Environmental Compliance Approval No. 2290-CAVKGN for industrial sewage works serving the Rainy River Mine located at 5967 Highway 11/71, in the Township of Emo, Ontario.
New Gold Inc. is proposing to amend its existing Environmental Compliance Approval to increase the total effluent treatment capacity at the Rainy River Mine to 59,000 cubic metres per day and the authorized discharge to the Pinewood River to 126,000 cubic metres per day. The proposed increase is required to manage site-wide water volumes and ensure ongoing regulatory compliance as mine operations expand.
Scope of Proposed Changes:
- increase maximum effluent treatment capacity to 59,000 cubic metres per day
- increase maximum discharge limit to the Pinewood River to 126,000 cubic metres per day
- expand the Domestic Sewage Treatment Plant to support up to 900 site personnel
- install a new septic system to serve an additional 200 personnel at the Underground Laydown Area
Rationale:
The amendment is driven by long-term mine water balance forecasts, which show that higher treatment and discharge capacities are necessary to control pond volumes within the Tailings Management Area. This requirement becomes more pronounced after 2029 due to increased pore water release from the tailings. Additionally, with the ramp-up of underground operations, the mine requires expanded sewage treatment infrastructure to support the projected workforce.
Supporting materials
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135 St. Clair Avenue West
Floor 1
Toronto,
ON
M4V 1P5
Canada
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Client Services and Permissions Branch
135 St Clair Ave West
1st Floor
Toronto,
ON
M4V 1P5
Canada
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Contact
Client Services and Permissions Branch
135 St Clair Ave West
1st Floor
Toronto, ON
M4V 1P5
Canada