Avista files 2025 Natural Gas Integrated Resource Plan

The utility commissions will now review the IRP and provide an opportunity for public comment. The IRP is available for review at www.myavista.com/irp. About Avista Utilities Avista Utilities is involved in the production, transmission and distribution of energy. We provide energy services and electricity to 422,000 customers and natural gas to 383,000 customers in a service territory that covers 30,000 square miles in eastern Washington, northern Idaho and parts of southern and eastern Oregon, with a popul ...