Water being released from eastern Idaho reservoirs to support downstream fish migration will continue flowing over Shoshone Falls until July 20, providing the summer’s best opportunity to view the falls.
The U.S. Bureau of Reclamation is in the process of releasing approximately 240,000 acre feet of water at Milner Dam to help migrating salmon and steelhead in the lower stretch of the Snake River reach the Columbia River and, ultimately, the Pacific Ocean. The result is about 5,000 cubic feet per second (cfs) going over the falls.
Flows will begin ramping down July 17–20 to less than half of what they are now. By Aug. 5, water managers expect flows past Milner Dam to be at zero, leaving just a few hundred cfs at the falls.
For much of the late spring and summer, most of the Snake River is diverted upstream for agricultural irrigation. For more information and a live look at Shoshone Falls, visit tfid.org/309/Shoshone-Falls.