SPOKANE, Wash., May 14, 2010 /PRNewswire via COMTEX/ --Avista Corp.'s (NYSE: AVA) board of directors has declared a quarterly dividend of $0.25 per share on the company's common stock. The common stock dividend is payable June 15, 2010, to shareholders of record at the close of business on May 27, 2010.

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 356,000 customers and natural gas to 316,000 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-regulated 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.

SOURCE Avista Corp.