21-010 Dworshak Dam discharges to decrease to 10,500 cfs for upcoming week

Walla Walla Corps of Engineers
Published March 11, 2021

AHSAHKA, Idaho – In order to meet flood control targets for March and April, Dworshak Dam will be decreasing releases starting Friday night, March 12, at midnight. This decrease will result in the river lowering less than 1 foot over the hour between midnight on Friday and 1 a.m. Saturday morning, and less than 1 foot between 1 a.m. and 2 a.m., after which time flows will remain constant.

The rate of change in downstream river stage will be limited to below one foot per hour as measured at the United States Geologic Survey (USGS) Clearwater River Near Peck, ID (gage #13341050).

The basin’s snowpack remains above average. Forecasts project both normal temperatures and normal precipitation for this time of year over the next week. This forecast, in combination with current basin conditions, has prompted the slight decrease in releases from Dworshak Dam and Reservoir near Orofino, Idaho. The release will be decreased from 13,800 cubic feet per second (cfs) and held constant at 10,500 cfs through Friday, March 19. 10,500 cfs is within the powerhouse capacity, so all water will be released through the powerhouse, with no flow spilling.

The Corps works with regional water managers, other agencies, tribes, and fish managers and hatcheries in joint efforts to 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. 21-010