Retirement Plan For The Employees Of The Avista Corporation is a single-employer corporate pension fund based in Spokane, Washington. Established in 1948, the plan is a defined benefit plan established by Avista Corporation for the benefit of the employees of the Company. It provides normal retirement, death and disability benefits to its eligible beneficiaries. The plan is administered by the company's benefit plan administrative committee. The committee has overall responsibility for the operation and administration of the plan.