U.S. Sen. Richard Blumenthal, D-Conn. and U.S. Rep. Rosa DeLauro, D-3, said in statement Wednesday night that they received notice from Federal Energy Regulatory Commission Chairman John Wellinghoff that the agency and FirstLight, the company that controls the Stevenson Dam, would immediately begin a review of the Lower Housatonic River flood plan in response to their letters of concern after the March flooding.