As a consequence of partition of the Indo-Pakistan Sub-Continent in 1947, India and Pakistan became two independent sovereign states. The Irrigation System which existed at the time of partition in 1947 was divided between the two countries without any regards to the irrigation boundaries resulting in an international water dispute which was resolved by signing of the Indus Water Treaty in 1960 under the aegis of World Bank. The Treaty assigned three Eastern rivers (Ravi, Beas and Sutlej) to India and three Western rivers (Indus, Jhelum & Chenab) to Pakistan. IBIS ManglaIt also provided construction of replacement works called Indus Basin Project (IBP) to compensate for perpetual loss of Eastern river’s water. The works proposed under the Treaty included two multipurpose dams from one of which is Mangla Dam on Jhelum River having the provision of Power Generation.
Mangla Dam Project was actually conceived in 1950’s as a multipurpose project to be constructed at a place called Mangla on river Jhelum located about 30 km upstream of Jhelum city. The initial investigation & its feasibility studies were completed in 1958. Later on the project was included in the Indus Basin Project. The construction of Mangla Dam was started in 1962 and completed in 1967.