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Scope/Content: Abstract: The Klamath River in northern California and southern Oregon supports important runs of anadromous fish species including Coho and Chinook salmon and steelhead trout, as well as resident rainbow trout. The river also supports a variety of other beneficial uses, including recreational uses, water supply uses, cultural uses, and power generation. Poor water quality in the Klamath River currently threatens many of the beneficial uses of the river and is considered to be a major contributing factor in the decline of anadromous salmonid populations from historical levels. In 2008, PacifiCorp, the owner of Iron Gate Dam, Copco 1 and 2 dams, and J.C. Boyle Dam on the middle and upper Klamath River, reached an agreement with several other interested parties to consider dam removal as an approach to restoring salmonid access to spawning and rearing habitat and improving water quality in the river. This report describes our current understanding of the potential water quality impacts of dam removal, presents an assessment of data gaps, and offers a set of conceptual study plans for addressing identified data gaps and improving our understanding of water quality in the Klamath River. Scope/Content: Author affiliation: Stillwater Sciences
Ecology and river restoration Fisheries and fish passage Sediment and channel dynamics Dams Dam retirement
Klamath River, CA Klamath River, OR Copco 1 Dam Copco 2 Dam Iron Gate Dam J.C. Boyle Dam