SPOKANE, Wash.--(BUSINESS WIRE)--May 24, 2004--Avista Corp. (NYSE:AVA) will hold a business update and progress report webcast on Wed., May 26, 2004, at 12:30 p.m. Eastern time (9:30 a.m. Pacific time).

This event is being webcast by CCBN and can be accessed at Avista's web site 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 access the webcast 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.
             Jessie Wuerst (Media), 509-495-8578
             jessie.wuerst@avistacorp.com

    SOURCE: Avista Corp.