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Posted 4/9/2018

Release no. 18-033

Public Affairs Office

AHSAHKA, Idaho – Discharge flows from Dworshak Dam and Reservoir will be decreased tomorrow, April 10, 2018, beginning at about 9 a.m., from approximately 10,000 c.f.s. (cubic feet per second) to about 7,500 c.f.s., according to reservoir managers at the U.S. Army Corps of Engineers' Walla Walla District.

The water surface elevation of the mainstem Clearwater River is expected to lower by about 3-4 inches during this outflow decrease, as measured at the U.S.G.S. stream gage located near Peck, Idaho, about 4 miles downstream of Ahsahka. Additional changes in water releases may be necessary as weather and inflow conditions change.

For safety, boaters, anglers and other people using waterways both in Dworshak Reservoir and downstream of the dam are advised to be alert to changes in water elevation and volume of flow. Be sure to wear a life jacket whenever you are in, on or near the water. Current water-management conditions can be viewed on the District website at www.nwd-wc.usace.army.mil/nww/rreports.htm.

The Corps works with regional water managers, other agencies and tribes, and fish managers and hatcheries as the Corps reduces flood risk. That includes joint efforts to keep total dissolved gasses (TDG) below the Idaho State maximum threshold, when possible. When water is released from the dam, gasses can be absorbed into the water. High TDG levels can be unhealthy for fish.

The Corps’ highest priority is public safety, so we operate to provide flood risk reduction benefits, while continuing our efforts working with other agencies to reduce the impact of flood operations on fish, according to Corps reservoir managers. The Corps will continue to monitor river basin conditions, weather forecasts and impacts on fish.

Dworshak Dam flood risk management