Wind

Avista outlines plan to meet future needs of its electric customers

SPOKANE, Wash., May 23, 2003 — Avista Corp. has submitted its 2003 Integrated Resource Plan (IRP) to the public utility commissions in Idaho and Washington. The IRP describes the mix of generating resources including an investment in wind power, as well as energy efficiency programs to meet future electric power needs at least cost.

“Avista’s long-term resource plan demonstrates our commitment to cost effective renewable energy and energy conservation,” said Ron Peterson, Avista Utilities vice president of energy resources and optimization. “Avista’s preliminary plan includes the acquisition of 75 megawatts of wind power starting in 2008. That’s enough power to serve 48,000 homes and businesses.”

The IRP includes a diverse portfolio of generating resources and the continuation of the company’s commitment to energy conservation. In the last 10 years, Avista has achieved a total of 599 million kilowatt-hours in energy savings through its conservation programs. The company’s future energy efficiency efforts are expected to save 788 million kilowatt-hours over the 20-year period covered by the IRP. The IRP also includes a mix of thermal generation, peaking resources and long-term contracts.

The plan was developed over the past 18 months in conjunction with a technical advisory committee comprised of consumer groups, conservation advocates, regulators and outside technical groups.

“We appreciate the considerable time and effort put into our planning activities by our stakeholders,” said Peterson. “The contributions from the technical advisory committee were very important to our planning process.”

The IRP is created every two years with a 20-year view to the future. Prior to accepting the plan, the Washington Utilities and Transportation Commission and the Idaho Public Utilities Commission will take public comments over the next several months. The plans are available on the company’s website, www.avistautilities.com/resources/plans/default.asp.

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, Avista Labs and Avista Energy. Avista Corp.’s stock is traded under the ticker symbol “AVA” and its Internet address is www.avistacorp.com.