22-048 Boise River flows to start reducing as Lucky Peak is topped off next week

Walla Walla District Corps of Engineers
Published June 16, 2022
Lucky Peak Dam

Lucky Peak Dam

The U.S. Army Corps of Engineers and the Bureau of Reclamation have begun to reduce Boise River flows through the city of Boise.  Currently flows passing the Glenwood Bridge are approximately 2,400 cubic feet per second (cfs) which will be reduced by 500 cfs tomorrow Friday, June 17, 2022.

Flows through Boise are anticipated to stay constant through the weekend, with further adjustment being made early next week as inflow from the mountains continues to recede.  Flood control operations will cease tomorrow, and all future releases will be for flow augmentation and irrigation needs.

Currently Lucky Peak Dam is at approximately 3,053 ft and the final fill to elevation 3,055 ft will occur mid-next week before holding steady for the recreation season.  Lucky Peak Lake is expected to stay full through mid-August.

The public should be aware that river flows may frequently change during the snow-melt season. A flow rate of 7,000 cfs, or about 10 feet in water depth, as measured at the Glenwood Bridge gauge, is considered flood-stage level on the Boise River. 

Officials advise the public to be aware of risks associated with Boise River flows. The water is deep, cold and fast. Extreme caution should be used near the riverbanks. 

For real-time Boise River flows at Corps and Reclamation facilities, visit https://www.usbr.gov/pn/hydromet/rtindex/boise.html
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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.

Public Affairs Office

Release no. 22-049