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A collaborative partnership formed to protect and revitalize anadromous fish populations in California by promoting collaboration among public and private sectors for fish passage improvement projects and programs

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  • Juvenile Fish Passage Criteria Assessment Project

    This research project tested the leaping abilities of juvenile steelhead and coho salmon ranging from 40–130mm at the Warm Springs Fish Hatchery on Dry Creek in Sonoma County, using a flume with waterfall heights of 6, 12, and 18 inches. Four experiments examined waterfall height, fish size, species differences, and water temperature. Findings directly informed the 2019 NMFS Guidelines for Salmonid Passage at Stream Crossings, including an increase in the allowable maximum hydraulic drop for juvenile salmonids from 6 to 12 inches.