The hatchery provides over 1 million eyed coho salmon eggs and rears 1.5 million coho salmon for release as yearling smolts to meet mitigation and restoration programs in the Columbia River basin. At the hatchery, 350,000 coho smolts are released to meet mitigation responsibilities and to provide a viable source of eggs through the returning broodstock. The Yakama Nation receives 500,000 yearling coho salmon for the Yakima River basin (Yakama Nation Fisheries Resource Management) and the Nez Perce Tribe receives 550,000 yearling coho salmon for release in the Clearwater River basin in Idaho. Both of these programs have been established for the purpose of restoring coho salmon runs in those river systems.
The hatchery currently rears and releases at the hatchery 100,000 yearling winter steelhead smolts for mitigation purposes. These steelhead return and spawn during the months of January, February and March