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Ecology and salmon related articles

Warm Water Stalls Steelhead Run into Snake

by Rich Landers
Spokesman-Review, August 3, 2012

Graph of adult Steelhead migration over Bonneville Dam FISHING -- As the graphs suggest, steelhead are moving over Bonneville Dam and heading up the Columbia, but a thermal barrier of warm water in the Snake River is keeping the fish from heading into Idaho.

The chart for Lower Granite Dam shows low numbers of fish heading over the last dam before they reach Lewiston and the mouth of the Clearwater. As of this week, the number of fish over Lower Granite is about a third the number of summer run steelhead recorded this time last year.

But they will come, sooner or later. Graph of adult Steelhead migration over Lower Granite Dam


Rich Landers
Warm Water Stalls Steelhead Run into Snake
Spokesman-Review, August 3, 2012

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