 To further help recover threatened chinook salmon and bull trout populations, in the Willamette River Basin, the U.S. Army Corps of Engineers constructed a fish collection and sorting facility on the South Fork McKenzie River below Cougar Dam which was completed in 2010.From 2003 to 2005, state-of-the-art turbine runners were installed in the turbine-generator units at the Cougar powerhouse, and were designed to resist cavitation and operate efficiently at very large head ranges.Cougar Dam was completed in 1963 at a cost of $54.2 million and the two turbine units were completed in 1964.