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Corps testing waters at Foster Lake to learn whether fish weir works effectively


May 2, 2018

CORY GRANT, right, of Normandeau Associates of Pennsylvania, activates balloons in a sensor fish held by Christopher Grant of Pacific Northwest National Laboratory of Richland, Wash., for release through the new fish weir at Foster Dam.

U.S. Army Corps of Engineers fish biologist Fenton Khan is confident the new weir at Foster Dam will improve fish passage downstream for winter steelhead and spring Chinook.

Providing more flow and a fish-friendly shape, he believes it will cause less injury and improve downstream passage, but at this point, it's just a hypothesis.

Now he must find out if the weir is working as intended.

Corps officials last week spent Monday through Sunday in a post-construction evaluation testing that hypothesis at low pool and running hatchery fish through over the weir to determine if it decreased inj...

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