WATCH: Controlled flood of the Grand Canyon begins a four-day exercise on the Colorado River https://www.azcentral.com/story/news/local/arizona-environment/2018/11/05/grand-canyon-flooded-high-flow-experiment-colorado-river-federal-officials-glen-canyon-dam-lake-mead/1861287002/ …pic.twitter.com/RiJXhQnTGS
10:28 PM - 5 Nov 2018
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