McArthur River Electrical Substation

Powering expansion of the world's largest high-grade uranium mine

Cameco Corporation | Canada | 2013–2015

largest high-grade uranium mine

18 million tpa
of uranium produced

2015 CIM Award
for project safety

New 138 kV
substation for mine power


  • Supply power for future infrastructure expansions at the McArthur River mine operation, the world's largest high-grade uranium mine.
  • Ore grades within the deposit are one hundred times the world average.
  • The operation can produce more than 18 million pounds of uranium each year by mining only 150 to 200 tonnes of ore per day.


  • Basic engineering was completed and full EPCM services were provided for the design and construction of a 32 MW, 138 kV electrical substation and standby power-generation facility.
  • The electrical substation was constructed, with power distribution and backup generation.
  • Diesel storage tanks and power distribution throughout the mine site were included.
  • Site preparation was initiated in 2012 and full construction was completed.


  • The McArthur River operation is the world's largest high-grade uranium mine.
  • Site is located in a remote area of northern Saskatchewan.
  • With challenging logistics and winter conditions, the project was executed with excellent local procurement and local contractor engagement.
  • Completed below budget.
  • Received the 2015 CIM Award for Project Safety.

Project numbers

C$100 million-plus capital value
18 million tpa of uranium
138 kV substation

What's your challenge?