States have started negotiating new rules to keep the Colorado River from crashing. Here’s what they want

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Hart Van Denburg/CPR News
Red rock stained white “bathtub rings” by evaporated minerals along the dropping waterline of Lake Powell on the Colorado River behind the Glen Canyon Dam, Page, Arizona, Feb. 20, 2023. Completed in 1964, the dam created a reservoir designed to help guarantee water delivery to states in the Lower Colorado River Basin in years of low flow. But now Lake Powell itself is depleting and silting up.