"Ambuklao water reservoir" . . "129.0" . "Ambuklao Dam" . . "1956-12-23" . "Ambuclao" . "452.0" . "Ambuklao" . "1956" . . "Central Core Rock-fill Embankment" . . . . "1950" . . . . "July 1950" . . . . . . "Ambuklao Dam" . . .