CHICAGO–(BUSINESS WIRE)–Exelon today announced that approximately $13 million will be returned to natural gas customers in the form of refunds and lower long-term costs, following the successful resolution of a multi-year federal pipeline rate case that would have increased natural gas delivery costs for customers. Exelon’s advocacy also helped avoid more than $12 million annually in additional costs that would have otherwise been passed on to customers. Customers of three Exelon operating co