21-025 Dworshak Dam has transitioned to refill for the spring

Published April 21, 2021

AHSAHKA, Idaho –Dworshak Dam has decreased discharges to minimum releases of 1,600 cubic feet per second (cfs) as the reservoir enters the spring refill season.

Discharges are expected to remain at 1,600 cfs through the end of April and into the first week of May. Natural flows in the mainstem of the Clearwater are increasing as Dworshak releases are minimized. The natural flows will continue to support out-migrating fish. Dworshak will continue to adjust reservoir releases to meet flood control targets and manage the rate of refill.

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 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. 21-025