SPOKANE, Wash., Aug. 13 /PRNewswire-FirstCall/ -- Avista Corp.'s (NYSE: AVA) board of directors has declared a quarterly dividend of $0.21 per share on the company's common stock. The common stock dividend is payable Sept. 15, 2009, to shareholders of record at the close of business on Aug. 27, 2009. (Logo: http://www.newscom.com/cgi-bin/prnh/20040128/SFW031LOGO) 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 353,000 homes and businesses and natural gas to 313,000 homes and businesses in three Western states, serving more than 492,000 customers. Avista's primary, non-regulated subsidiary is Advantage IQ. Our stock is traded under the ticker symbol "AVA." For more information about Avista, please visit http://www.avistacorp.com/. Avista Corp. and the Avista Corp. logo are trademarks of Avista Corporation. http://www.newscom.com/cgi-bin/prnh/20040128/SFW031LOGO http://photoarchive.ap.org/ DATASOURCE: Avista Corp. CONTACT: Media, Jessie Wuerst, +1-509-495-8578, , or Investors, Jason Lang, +1-509-495-2930, , both of Avista Corp., or Avista 24/7 Media Access, +1-509-495-4174 Web Site: http://www.avistacorp.com/

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