The 5 Biggest Dams in Pakistan By Engr. Rehan Zeb Khan At present there are over one hundred and fifty large and small dams and reservoirs in Pakistan. Most of the dams and reservoirs had constructed during 1960 and 1975. According to the International Commission on Large Dams (ICOLD), total dams and reservoirs in Pakistan over the height of 15 meter are 150. Below is the list of top five biggest dams in Pakistan.