Yukon Energy Receives Emergency Amendment to Mayo Water Use Licence - Wareham Spillway Construction to Move Forward

Jun 30, 2026  Comment

Yukon Energy has received an emergency amendment to its water use licence for the Mayo Hydro Facility, authorizing the in-water construction required this year to advance the Wareham Dam Spillway Project. 

The emergency amendment was necessary to allow critical in-water construction activities to proceed during the limited summer construction window. Given the urgency of replacing the aging spillway, completing this work this season is essential to maintaining the project schedule and reducing risks to public safety, infrastructure and the environment. 

Yukon Energy is reviewing the conditions of the emergency water use licence amendment and will continue to work closely with the First Nation of Na-Cho Nyak Dun, Village of Mayo and other partners throughout construction. Yukon Energy, along with its contractor, Kiewit, will also keep the community informed as the work progresses. 

The Mayo Hydro Facility is a key part of Yukon's renewable electricity system. The Wareham Dam Spillway Project is a critical infrastructure project that will replace the existing spillway, which has reached the end of its service life. Replacing the spillway is essential to maintaining public safety and ensuring the continued, reliable generation of renewable hydroelectric power in Mayo. 

 More information about the project is available at yukonenergy.ca/mayo-spillway

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