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Avista to begin Lake Coeur d’Alene drawdown
Annual slow drawdown will lower lake to winter level

Sept. 6, 2011: Avista is beginning its annual fall drawdown of Lake Coeur d’Alene Sept. 6. The lake will be gradually lowered approximately a foot from full pool by the end of September, and an additional 1½ feet per month thereafter until reaching its winter level. Property owners and boaters should take measures to secure docks and boats for the winter season during this period.
 
As part of Avista’s FERC license to operate its Spokane River Hydroelectric Project, which includes Post Falls Dam, Avista is required to maintain the level of Coeur d’Alene Lake at summer full-pool elevation of 2,128 feet from as early as practical in the spring until the Tuesday after Labor Day.
 
The slow drawdown will increase flows of the Spokane River downstream of Post Falls, and will slightly decrease river levels between the lake and Post Falls bridge. Spill gates at Post Falls Dam will not be opened for the drawdown, and the river should remain open for recreation until November; however, river users should be aware that water levels can fluctuate at any time depending upon weather and dam operations.
 
Avista has a 24-hour telephone information line that provides notification of anticipated elevation changes on Lake Coeur d’Alene, Lake Spokane and the Spokane River during the subsequent 24-hour and one-week periods. In Idaho, call (208) 769-1357; in Washington call (509) 495-8043.
 
The recorded information is provided to advise shoreline property owners, commercial and recreational users of changes in the lake and river elevation levels that may affect plans for water use.
 
Avista Corp. is an energy company involved in the production, transmission and distribution of energy as well as other energy-related businesses. Avista Utilities is our operating division that provides electric service to 357,000 customers and natural gas to 317,000 customers. Our service territory covers 30,000 square miles in eastern Washington, northern Idaho and parts of southern and eastern Oregon, with a population of 1.5 million. Avista's primary, non-utility subsidiary is Advantage IQ. Our stock is traded under the ticker symbol "AVA." For more information about Avista, please visit www.avistacorp.com.
 
Avista Corp. and the Avista Corp. logo are trademarks of Avista Corporation.

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