This frothy flume is what 300,000 gallons of water per second looks like. A 60-hour surge of almost 75 billion gallons, it’s part of an effort to revitalize the ecosystem of the Colorado River and the Grand Canyon. Teams from the U.S. Geological Survey, the Grand Canyon Trust and 25 other agencies have been working together since 1995 to develop a plan that will mimic natural flooding to redistribute sediment that would normally wash downriver.

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The AP is reporting that next month the U.S. Geological Survey will stage a controlled flood of the Colorado River in the Grand Canyon via the Glen Canyon Dam in order to learn whether they can approximate the natural conditions of the river.

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