BOISE, Idaho – The U.S. Army Corps of Engineers and the Bureau of Reclamation will begin lowering the pool elevation of Lucky Peak Reservoir on Friday, July 23 to meet irrigation demand. This drawdown is earlier than previous years due to extremely dry and hot weather conditions and below normal runoff.
Lucky Peak Reservoir will reach its winter pool elevation of approximately 2950 feet by mid-September, depending on future irrigation demand and precipitation. As water levels decrease, recreators should be aware of boat ramp elevations as the drawdown will ultimately impact recreation.
The Boise system, comprised of Anderson Ranch, Arrowrock and Lucky Peak reservoirs, is at 59% of total capacity. Below normal carryover is projected in the Boise River system reservoirs at the end of the irrigation season.
For real-time Boise River flows at Corps and Reclamation facilities, please visit https://www.usbr.gov/pn/hydromet/boipaytea.html.
Graph showing elevations of Lucky Peak Reservoir from February to October for recent years.
Release no. 21-046