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Ecology and salmon related articles

Dworshak Dam Discharge to Increase
to Support Hatchery Releases

by US Army Corps of Engineers
Daily Fly, April 8, 2022

Officials from the U.S. Army Corps of Engineers announced that Dworshak is now ranked at 'low risk of failure' or 4 on a scale of 1 to 5, with 5 being the most safe. (File / The Spokesman-Review) AHSAHKA, Idaho -- Dworshak Dam is currently discharging 7,100 cubic feet per second (cfs). Discharges will remain steady for the next week before increasing to 9,500 cfs to support local hatchery releases. Discharge for the remainder of the month, after hatchery releases are concluded, is expected to be in the approximate range of 8,000 to 10,500 cfs.

Operations to increase discharge to 9,500 cfs at Dworshak will occur simultaneously with decreasing natural flows. The Clearwater River near Peck will remain at an approximately constant level, within half a foot.

The current operation will result in total dissolved gas (TDG) remaining below 110%. The Corps will continue to work with regional water managers, other agencies, tribes, and fish managers and hatcheries in joint efforts to meet reservoir objectives and keep TDG below the Idaho State maximum threshold of 110%, when possible.

The rate of change in downstream river stage limit of one foot per hour, as measured at the United States Geological Survey Clearwater River Near Peck, ID (gage #13341050), will not be violated due to project operations.

For safety, the public is advised to be aware of the danger associated with fluctuating river flows and elevations. The river at this time of year is deep, cold, and fast, so extreme caution should be used near riverbanks. Boaters, anglers, and other people using waterways both in Dworshak Reservoir and below the dam on the Clearwater River are advised to be alert to changes in water elevation and volume of flow. Current Dworshak water-management conditions can be viewed on the Walla Walla District website at

Related Pages:
Dworshak Reservoir Starts Water Release Early by Staff, Lewiston Tribune, 6/24/21
Cold Water Released from North Idaho Dam to Help Salmon by Associated Press, The Olympian, 6/25/21
Dworshak Flows Increase; Clearwater Level Expected to Rise by Staff, Lewiston Tribune, 5/23/19
Agency Plans to Cut Dworshak Reservoir Water Flows Today by Staff, Lewiston Tribune, 4/6/19
Clearwater River Level to Drop a Foot Below Dworshak; Dam Outflows Reduced for Juvenile Fish by Staff, Daily Fly, 7/19/18
Corps Reduces Dworshak Flows for Fish by Eric Barker, Lewiston Tribune, 3/27/18
Dworshak Dam Tests May Cause River Flow Changes by Staff, Lewiston Tribune, 6/28/18
Rehab of Dworshak's Unit 3 Has its Share of Hiccups by Elizabeth Morgan, Clearwater Tribune, 8/16/17
Dworshak Dam Discharge Flows Lowered to Reduce Flooding Impacts Downstream by Mia Carlson, Daily Fly, 3/20/17
Dworshak Reservoir Filling Up Early by Associated Press, KTVB, 4/26/15

US Army Corps of Engineers
Dworshak Dam Discharge to Increase to Support Hatchery Releases
Daily Fly, April 8, 2022

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