River Ops Review 2017: Overall Hydrosystem Survival For Chinook/Steelhead Smolts Below Average

For the third straight year, overall hydrosystem survival – Lower Granite Dam on the lower Snake River to Bonneville Dam on the lower Columbia River – for yearling chinook smolts during spring 2017 was below average (this year about 6 percent below average), with an overall survival rate of 44 percent, according to a preliminary report.

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