It is named after the town Tarbela , in Khyber Pakhtunkhwa , about 50 kilometres ( 31 mi ) northwest of Islamabad , at Haripur District .
It 's the largest earth - filled dam in the world and also the largest by structural volume .
dam is named after the town dam , in Khyber Pakhtunkhwa , about 50 kilometres ( 31 mi ) northwest of Islamabad , at Haripur District .
It 's the largest earth - filled dam in the world and also the largest by structural volume .