Kalabagh Dam for financing assistance, but due to strained relations with Afghanistan (a Soviet ally), this request was denied. The government then approached the World Bank, which agreed to finance the project. At this point in Pakistan's history, previous dam projects such as Mangla (under Ayub Khan) and Tarbela (under Zulfikar Ali Bhutto) never faced any opposition. Even Kalabagh was approved by the Central Development Working Party, without dissent. The issue of Kalabagh started to become politicized after the execution of the former Prime Minister Zulfikar Ali Bhutto, a highly popular leader from the downstream province of Sindh. Adding to the controversy,
Mangla Dam stemmed from the seasonal variations in the river flow due to monsoons and the absence of storage reservoirs to conserve the vast amounts of surplus water during those periods of high river discharge. The Mangla Dam was the first of the two dams constructed to reduce this shortcoming and strengthen the irrigation system of the country as part of the Indus Basin Project, the other being Tarbela Dam on River Indus. Mangla Dam was constructed at a cost of Rs. 15.587 billion (US$1.473 billion) with the funding being provided by the World Bank and the Asian Development Bank. The dam