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Using WEAP and SALMOD models, the study finds that climate change leads to lower summer base flows and higher water temperatures in Butte Creek, increasing adult thermal mortality for spring-run Chinook salmon. While ceasing water diversion for power production improves survival time, the authors conclude that simple operational changes are unlikely to prevent the long-term extinction of the species in this location.

The document details the struggle to protect spring-run Chinook salmon in Butte Creek, California, from the effects of water diversions by Pacific Gas & Energy's DeSabla-Centerville hydroelectric project. It highlights the species' vulnerability to low flows and high temperatures, the role of the Centerville Head Dam in blocking habitat access, and the legal pressure applied by Earthjustice to secure adequate water for spawning fish.