AHSAHKA, Idaho – Dworshak Dam will be increasing releases to 9,700 cubic feet per second (cfs), to support hatchery releases which begin Wednesday, March 31.
Increases will occur over two evenings: Monday, March 29 and Tuesday, March 30, from 7 p.m. to 11 p.m each evening. This increase, in combination with rising natural flows, will result in the Clearwater River near Peck rising approximately 1.5 feet each evening. Releases will remain constant through Friday, April 2 once they reach 9,700 cfs.
The rate of change in downstream river stage will be limited to below one foot per hour as measured at the United States Geological Survey (USGS) Clearwater River Near Peck, ID (gage #13341050).
The overall snowpack in the North Fork Clearwater basin is near average for this time of year. Reservoir releases will be adjusted throughout the month of April to support hatchery releases, meet flood control targets, and control refill. 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 total dissolved gas (TDG) below the Idaho State maximum threshold of 110%, when possible.
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 https://www.nwd.usace.army.mil/CRWM/Water-Control-Data/Project-Data/.
Release no. 21-014