Removing Pre-smolts from Hatchery Raceways

U.S. Fish and Wildlife Service employees move (known as 'crowding' juvenile Tule Fall Chinook salmon to the end of a raceway, or "pond," where the fish will enter an opened raceway gate, swim down a Hatchery channel, and then out the Hatchery intake pipe their parents once swam up and into the Columbia River, where they will being their migration to the Pacific Ocean. Image taken from USFWS Pacific Region Flickr page.