How much longer can Glen Canyon Dam last?
This spring, the Bureau of Reclamation revealed damage to the river outlet works system of Glen Canyon Dam. While there is no structural risk to the huge dam on the Colorado River, the incident drew attention to the dam’s antiquated infrastructure and brought into question its ability to sustain water releases from Lake Powell at lower elevations. At risk are both the lower Colorado River Basin’s ecosystems—including the Grand Canyon—and the 30 million people who rely on the Colorado’s water. The damage was caused by a High Flow Experiment Release in April, 2023, by cavitation, a process that happens when water passing through pipes at high velocity creates air bubbles that cause erosion. During the 2023 release, 3,500 CFS (cubic feet per second) of water was released through the outlet works pipes for 72 hours. The aim was to distribute sediment throughout the Grand Canyon to maintain healthy beaches and riparian habitats.