BOISE, Idaho -- The U.S. Army Corps of Engineers plans to reduce flows through the City of Boise by 600 cubic feet per second (cfs) on Wednesday, June 26, reaching approximately 2,750 cfs by late-morning. They will follow that by decreasing flows by 600 cfs on Thursday and 600 cfs on Friday, reaching 1,550 cfs at the Glenwood gauge on Friday morning.
Currently, Boise River flows through town are approximately 3,350 cfs, as measured at the Glenwood Bridge gauge.
The decrease in flows from Lucky Peak Dam and Lake is in response to recently reduced inflows. The flow decrease is necessary to help balance reservoir-refill as the system transitions to summer operations in the coming weeks.
Ada County Parks & Waterways will release information on when the Boise River float season begins. Please visit their Facebook page at https://m.facebook.com/FloatTheBoiseRiver/ for float season kick-off and river safety guidelines.
Currently, the Boise River reservoirs are at about 96% of capacity. As of June 25, the Boise River system of reservoirs has about 35,677 acre-feet of available storage space. A full supply of irrigation water is anticipated this summer.
The Corps of Engineers and the Bureau of Reclamation operate three dams on the Boise River as a system to manage flood control and irrigation storage needs -- Lucky Peak Dam, Arrowrock Dam and Anderson Ranch Dam. Storage capacity provided by Reclamation’s Arrowrock and Anderson Ranch dams, and the Corps’ Lucky Peak Dam, combined with well-planned water releases, help manage Boise River flows through the City of Boise. For real-time Boise River flows at Reclamation facilities in the Pacific Northwest Region, visit https://www.usbr.gov/pn/hydromet/rtindex/boise.html.
Release no. 19-073