 In the following years , the name " Boulder Dam " failed to fully take hold , with many Americans using both names <unk> and <unk> divided as to which name should be printed . Memories of the Great Depression faded , and Hoover to some extent rehabilitated himself through good works during and after World War II . In 1947 , a bill passed both Houses of Congress unanimously restoring the name " Hoover Dam . " Ickes , who was by then a private citizen , opposed the change , stating , " I didn 't know Hoover was that small a man to take credit for something he had nothing to do with . " 
