Koocanusa Weir Feasibility Study and Virtual Town Hall

January 8, 2021

The B.C. government has released an independent report outlining preliminary costs, benefits and impacts related to the feasibility of building a weir/dam across Koocanusa Reservoir. The report was commissioned by the Province in response to calls from some local residents to construct a weir across Koocanusa Reservoir, which spans the B.C.-Montana border south of Jaffray. The suggestion came as a result of ongoing concerns about summer changes to Koocanusa water levels and their impact on recreation on the Canadian side of the reservoir. Water levels rise and fall as a result of the U.S. Army Corps of Engineers’ operations at Libby Dam on the U.S. side of the border.

View and/or download the report: Lake Koocanusa: High Level Assessment of a Proposed Dam

Feedback on the report will be accepted until midnight on February 12, 2021, and can be sent by email to columbiarivertreaty@gov.bc.ca or by mail to Ministry of Energy, Mines and Low Carbon Innovation, Columbia River Treaty, PO Box 9314 Stn Prov Govt, Victoria BC V8W 9N1.


The Province held a Virtual Town Hall on Jan. 12, 2021 to share the results of this study and to seek feedback. Materials from that session will be posted below as they are finalized.