Tarbela Dam
Where is Tarbela Dam located?
What was the purpose of building Tarbela Dam?
How much electricity does Tarbela Dam generate?
What were the impacts of Tarbela Dam construction on local communities?
Tarbela Dam, earth-and-rock-fill dam on the Indus River, in Haripur and Swabi districts of Khyber Pakhtunkhwa province, Pakistan. Its construction began in 1968 and was completed in 1976. It is the largest earth-and-rock-fill dam in the world by volume (though larger earth-fill dams exist). Along with the Mangla Dam on the Jhelum River and the Chashma Dam, also on the Indus River, Tarbela Dam is one of the major structures constructed in Pakistan as part of its Indus Basin Project, which resulted from the Indus Waters Treaty (IWT) between India and Pakistan, signed on September 19, 1960. Together with their subsidiary dams, Tarbela and Mangla were built to control seasonal fluctuations on the Indus River.
History
The IWT assigned the waters of the three eastern rivers (Ravi, Beas, and Sutlej) of the Indus River system to India and those of the three western rivers (Indus, Jhelum, and Chenab) to Pakistan. The Pakistani government set up the semiautonomous Water and Power Development Authority (WAPDA) in 1958 to oversee the hydroelectric power projects it planned to build under the terms of the treaty.
Tarbela Dam’s construction was, therefore, closely related to the IWT. The World Bank, which had brokered the treaty, played a significant role in initiating the Indus Basin Project in Pakistan. The Indus Basin Development Fund (IBDF) was set up to finance the various dams and canals envisioned as part of the project. The total raised for the IBDF was $895 million, of which $541 million came from six countries—the United States, Canada, United Kingdom, West Germany, Australia, and New Zealand. India paid about $174 million in compensation per the IWT.
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India-Pakistan tensions in 2025
In April 2025 a terror attack in Pahalgam, Jammu and Kashmir, sharply escalated tensions between India and Pakistan. India accused Pakistan of backing militant groups responsible for the attack and, as part of its diplomatic response, announced that it would place its participation in the Indus Waters Treaty (IWT) “in abeyance.” In June 2025 water release in Pakistan’s Punjab province fell to 124,000 cusecs (3.5 million liters per second) from 144,000 cusecs (4 million liters per second) the year prior.
However, because India lacks the infrastructure to fully block Indus flows into Pakistan, experts believe that the dip at Tarbela and Mangla dams in 2025 was due to seasonal variations. The actual impact on Tarbela Dam water levels from tensions over the IWT remains indeterminate.
Dimensions and power generation
The dam has a volume of 138,600,000 cubic yards (106,000,000 cubic meters). With an effective reservoir capacity of 5.73 million acre-feet (MAF; 7,068,000,000 cubic meters), the dam is 469 feet (143 meters) high and 8,997 feet (2,743 meters) long. The reservoir’s initial gross capacity was about 11.6 MAF and its live (or effective) capacity was about 9.68 MAF. Sediment buildup in the riverbed has reduced the live capacity to 5.73 MAF in August 2025, a reduction of about 40 percent. Despite this challenge, Tarbela Dam remains Pakistan’s largest electricity generation facility, with an installed capacity of 4,888 megawatts. This represents 51.6 percent of the total capacity generated by WAPDA-associated power projects and about 30 percent of the country’s power needs as of 2012. The fifth extension project for the dam plans to increase this to 6,418 megawatts by 2027.
Human impact
More than 120 villages in Haripur and Swabi districts are believed to have been submerged and over 96,000 people displaced because of the construction of the dam. Resettlement remains controversial. Some sources allege that many displaced families never received compensation, while others received land far smaller than their holdings before the construction of the dam. A 2009 investigative committee, however, reported that compensation had been awarded at fair market value.
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The government of Pakistan also constituted a commission in 1998 to investigate delays in resettlement for about 11,000 claimants. In 2010 the Peshawar High Court notably ordered WAPDA to dispense compensation to those displaced by the Tarbela Dam project and allot land as appropriate. On appeal by WAPDA, the order was upheld by the country’s Supreme Court. Moreover, through the Tarbela Fourth Extension Hydropower Project and similar initiatives, the government implemented a formal Land Acquisition and Resettlement Framework to oversee outstanding cases of compensation.