The Brief St. Petersburg's 30-year franchise agreement with Duke Energy expires at the end of Friday, but Duke says customers will continue receiving electric service. St. Petersburg & Duke Energy agreementWhat we know:The city's 30-year franchise agreement with Duke Energy expires at the end of the day. Duke Energy says it will continue delivering reliable electric service to its customers in St. Pete after the franchise agreement expires. Duke Energy grid modernizationThe other side:Duke Energy says renewing the franchise agreement is the best path forward for customers. St. Pete energy studyWhat's next:The expiration of the franchise agreement does not mean St. Pete is creating its own electric utility.