Population-Specific Mainstem SAR Data Updated

Mainstem smolt to adult return rate (SAR) data from the Fish Passage Center were updated December 24, 2018. We annually obtain mainstem SAR data from Fish Passage Center, determine the natural populations represented by each, and make these data available in the Coordinated Assessments query system. We now provide these data for the upper Columbia, middle Columbia, and Snake rivers for the years 1994-2006.