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Tens of thousands of culverts lie beneath roads in the Pacific Northwest, successfully moving water under the roadbed to preserve the road and prevent flooding. Young salmon move both up and downstream throughout the year and must pass through culverts such as these, which may be blocking them from reaching thousands of miles of habitat.

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Document Title: Culverts
Category: Marine Science, Wildlife and Environmental Studies
Media Type: Photos
Date of Image/Photo: March 2002
Background: Pacific Northwest National Laboratory is participating in a consortium led by the Washington State Department of Transportation that includes the transportation departments of other West Coast states and Alaska. The consortium funds a program to find viable retrofits for the thousands of culverts in the Pacific Northwest that may be preventing juvenile salmon from completing their life cycles.
URL of this page: http://picturethis.pnl.gov/picturet.nsf/by+id/AMER-5UAPUD

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