Spokane, WA-based Avista Corp. and Toronto-based Hydro One Ltd. have settled regarding their proposed merger in Oregon and filed an all-parties, all-issues agreement with the Oregon Public Utility Commission. Customers in Oregon would receive rate credits effective at the close of the merger. The Oregon settlement and agreements in Washington, Idaho, Alaska and Montana would collectively provide $78.6 million in benefits to utility customers, according to Avista. No merger costs are to be recovered from customers in any of the states.