In this April 23, 2019, file photo, Tennessee Valley Authority President Jeff Lyash speaks with the Times Free Press from the TVA Chattanooga Office Complex in Chattanooga, Tenn. Four environmental organizations are asking the Tennessee Valley Authority’s internal watchdog to investigate whether the nation’s largest public utility misused ratepayer money to lobby against federal environmental regulations. The request comes after the activist group Energy and Policy Institute released more than 500 pages of records it obtained through a Freedom of Information Act request. (C.B.