McDonald: Entergy Chooses MISO Over Southwest Power Pool by Arkansas Business Staff Posted 4/25/2011 11:53 am Updated 6 years ago Arkansas ratepayers will then share in savings from Entergy's decision to join the Midwest Independent System Operator at about the same time, Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access articles older than 15 days. Articles newer than 15 days are not included in this offer. Purchase Now Already have archive access? Login to view this article.