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Spokane River

Avista to drawdown Lake Spokane   

Tags: Avista Utilities, Electricity, Hydro power, Safety, Spokane River, Washington, Weather

Lake Spokane
High water flows prompt action
Post by Anna Scarlett 
Avista will be drawing down the elevation of Lake Spokane (also known as Long Lake) over the next several days, in order to perform maintenance work required as a result of the current and projected high flows on the Spokane River.

As of May 9, the level of Lake Spokane was about 1,535 feet, which is about 1 foot below its normal summer elevation. We expect to decrease the level of the reservoir to bring it to an elevation approximately 3 feet below normal summer level by Thursday, and will return the reservoir to approximately 1 foot below its summer elevation beginning next week.

Due to high seasonal snowpack and warmer temperatures, the National Weather Service is predicting rapidly increasing river flows and high water on the Spokane River over the next several weeks. Avista operators at our Spokane River hydroelectric facilities, which include Post Falls, Upper Falls, Monroe Street, and our downstream dams, Nine Mile and Long Lake, work together to coordinate spilling so that we operate efficiently and manage reservoir levels. However, we want to remind you that weather conditions can cause river and reservoir levels to change rapidly, so please use caution on the water and comply with all posted notices and closures.

Avista wants you to stay safe during your spring and summer activities on area reservoirs and waterways. Please remember, especially during spring run-off, the waters near a dam can contain hidden dangers. Swirling water, submerged objects, strong currents and open spill gates can pose serious hazards to boaters and other recreationists, and sudden discharges of water from spillways and turbines can rapidly increase water levels and river flows. You can always check river and lake levels on our website at, or by calling 509-495-8043 or 208-769-1357.

We apologize for any inconvenience this may cause, and appreciate your understanding as we perform necessary maintenance and operations of our hydroelectric facilities on the Spokane River.

If you have any questions about this drawdown, please send us an e-mail.
Posted by  System Account  on  5/10/2011
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