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Field and laboratory tests by Pacific Northwest National Laboratory confirmed that juvenile lamprey were getting stuck in the 1/8-inch gaps in the bar screens used to guide juvenile migrating salmon away from turbine intakes at hydropower dams. PNNL's data convinced the US Army Corps of Engineers to switch to screens with 2/24-inch bar spacing for its juvenile bypass system screens. This photo was taken at an operating dam using an infrared underwater camera.

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Document Title: Lamprey Studies
Category: Energy Production and Conservation, Environmental Remediation, Wildlife and Environmental Studies
Media Type: Photos
Date of Image/Photo: N/A
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URL of this page: http://picturethis.pnl.gov/picturet.nsf/by+id/AMER-6DN_4J

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