Thursday, March 05, 2015

New numbers won't change debate about Snake River structures

 by Rocky Barker

Jim Waddell is walking the path blazed by McCall biologist Don Chapman.

Waddell, a retired U.S. Army Corps of Engineers economist, now says the agency's 1999 calculations - released in final form in 2002 - on the cost and benefits of the four lower Snake River dams in Washington were wrong. Breaching the dams, he says, was the most economically sound route for the Pacific Northwest, not gold-plating the dams with fish-passage devices, new electric-generating turbines, new locks and repeated, regular dredging.

Chapman is a former University of Idaho fisheries professor who went from beloved mentor for a generation of fisheries biologists to become the hydroelectric industry's most respected defender in the 1990s. He said until 2005 that the fish-bypass systems were adequate, until it became clear that the rising temperature of the Columbia River and its tributaries and the effects of global warming on ocean conditions made breaching those dams the best hope for Idaho's wild salmon to survive or flourish.

 It's a decade later and little has changed. Cyclical Pacific Ocean conditions - cold currents that increase the availability of food and keep predator numbers low - have allowed salmon and steelhead numbers to balloon since 2000, when the decision was made to forgo breaching despite the scientific consensus of the time. Fish-passage devices at the dams and increased spill of water over the dams ordered by a federal judge to aid migration have helped boost salmon populations, as have a host of other costly actions throughout the watershed.

But the overall scientific argument has changed very little. The science continues to show that breaching the four dams is the most effective way to restore salmon in what is the best, healthiest habitat left in the Pacific Northwest...



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