On-Going Experiment In High-Volume CO River Releases From Glen Canyon Dam Set for November 5

Arizona Water News

Glen Canyon Dam high flow release photo

Science is all about experimentation, and one of the more spectacular experiments in the movement of Colorado River sediment is set to begin in a matter of days.

Beginning November 5, the Department of Interior will begin a High-Flow Experiment (HFE) release of water out of Glen Canyon Dam, slowly ramping up the volume to 38,100 cubic feet per second, which it will maintain for 60 hours over three days.

The forceful water release is intended to mimic the floods that once drove enormous volumes of sand through the river canyons prior to the construction of Glen Canyon Dam, which rebuilt eroded sandbars downstream.

Those reconstituted, enlarged beaches serve a number of valuable purposes – from providing camping space for river-rafters to creating backwater habitat for native fish populations. The enlarged eddies and pools enhanced by those bigger sandbars also encourage the growth of riparian vegetation that provides…

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