The regional energy giant announced it will launch the barge-like technology this week.
In 2012, State Department of Fish and Wildlife planted two million Fingerling sockeye in the lake known for its low numbers of salmon.
The launch is a test to gauge salmon population growth and see if the fish will move from the lower reservoir and closer to prime habitats.
Roger Thompson with Puget Sound Energy says the collector mimics river currents to attract and move the fish.
He says it is very similar to another that was put into service at Baker Lake in 2008.
Thompson confirms the technology has contributed to higher returns of adult sockeye in the area over the last three years, topping out at over 48,000 in 2012.