SPOKANE, Wash.--(BUSINESS WIRE)--June 30, 2004--Avista Corp. (NYSE:AVA) will hold its quarterly conference call and webcast to discuss second quarter 2004 results on Wed., July 28, 2004, at 10:30 a.m. EDT (7:30 a.m. PDT). A news release with second quarter 2004 earnings information will be issued at 7 a.m. EDT (4 a.m. PDT).

This call is being webcast by CCBN and can be accessed at Avista's web site at www.avistacorp.com or you may listen to the call by dialing 1.800.901.5231 in the United States, Passcode 17101012.

A replay of the call will be available until Aug. 4, 2004, by calling 888.286.8010, Passcode 74154237. The webcast will be archived for one year on the Avista Corp. website at www.avistacorp.com.

The webcast is also being distributed over CCBN's Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through CCBN's individual investor center at www.fulldisclosure.com or by visiting any of the investor sites in CCBN's Individual Investor Network. Institutional investors can access the call via CCBN's password-protected event management site, StreetEvents (www.streetevents.com).

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 a company operating division that provides electric and natural gas service to customers in four western states. Avista's non-regulated subsidiaries include Avista Advantage and Avista Energy. Avista Corp.'s stock is traded under the ticker symbol "AVA" and its Internet address is www.avistacorp.com.

    CONTACT: Avista Corp.
             Media Contact
             Jessie Wuerst, 509-495-8578
             jessie.wuerst@avistacorp.com

    SOURCE: Avista Corp.