Exelon, the Chicago-based electric, is progressing smoothly with its noncore power plant divestitures. Just this week, Exelon and its sellside adviser Bank of America Merrill Lynch, reached an agreement to sell its interests in two Pennsylvania power plants to ArcLight Capital, a Boston-based private equity firm. Keystone is a 720 megawatt plant located in Plumcreek Township and Conemaugh is a 536 megawatt facility in New Florence. Exelon has a 42% stake in Keystone and a 31% interest in Conemaugh. Its final asset on the block is its Hillabee plant, a 774 megawatt gas-fired facility in Alabama. That auction is being run by JPMorgan and sources say that the process late stage.