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![BROOD YEAR 2017 JUVENILE SALMONID PRODUCTION AND PASSAGE INDICES AT RED BLUFF DIVERSION DAM](/sites/default/files/styles/max_325x325/public/documents/by2017_rbdd_rst_final_annual_report_072519.pdf-p1.jpeg?itok=xyiX6-XI)
Brood year 2017 (BY2017) juvenile winter Chinook salmon estimated passage at Red Bluff Diversion Dam (RBDD) was 601,677 for fry and pre-smolt/smolts combined. The fry-equivalent rotary trap juvenile production index (JPI) was estimated at 734,432 with the lower and upper 90% confidence intervals (CI) extending from 471,292 to 997,572 juveniles, respectively. The estimated egg-to-fry (ETF) survival rate, based on the BY2017 winter Chinook fry-equivalent JPI was 48.7%, the highest value detected since monitoring began. The range of ETF survival rates based on the 90% CI were 31.3% to 66.2%.
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