The Brazeau Reservoir is a large man made reservoir in Alberta, Canada. It is located in the Brazeau County of west central Alberta, 55 kilometres (34 mi) south-west of Drayton Valley.
It was developed along the Brazeau River, at the confluence of the Elk River, in the hydrographic basin of the North Saskatchewan River.
Brazeau Reservoir is the largest hydroelectric plant owned by TransAlta and produces 394,000 MW·h per year, with an overall capacity of 355 megawatts.
An unusual feature of this hydroelectric development commissioned in 1965 is a pump system capable of lifting water from the reservoir into the 20 kilometres (12 mi) long canal leading to the power plant so that it can operate at low reservoir water levels.
For more an why the Dam was built click here