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Special report

Emergency-action plans lacking for some Arizona dams

Some Arizona dams considered to pose high or significant risk to people, property or the environment don't have updated emergency action plans on file, as required by law.... Read more»

Artificial floods in Grand Canyon could reduce non-native trout

Artificial floods over 14 years helped rebuild sandbars in the Grand Canyon but may have pushed non-native rainbow trout into an area frequented by the endangered humpback chub,... Read more»