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The Srisailam Dam
is a dam
A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are...
constructed across the Krishna River
The Krishna River , is one of the longest rivers in central-southern India, about . It is also referred to as Krishnaveni in its original nomenclature...
Srisailam is a holy town and mandal, situated in Nallamala Hills of Kurnool district, Andhra Pradesh, India. It is located on the banks of River Krishna, about 232 km south of Hyderabad....
in the Kurnool district
Kurnool District is a district in the state of Andhra Pradesh, India, located in the west-central part of the state on the southern banks of the Tungabhadra and Handri rivers. The town of Kurnool is currently the headquarters of the district...
in the state of Andhra Pradesh
Andhra Pradesh , is one of the 28 states of India, situated on the southeastern coast of India. It is India's fourth largest state by area and fifth largest by population. Its capital and largest city by population is Hyderabad.The total GDP of Andhra Pradesh is $100 billion and is ranked third...
India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
and is the 2nd largest capacity hydroelectric
Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy...
project in the country.
The dam was constructed in a deep gorge in the Nallamala Hills, 300 m (984.3 ft) above sea level. It is 512 m (1,679.8 ft) long, 145 m (475.7 ft) high and has crest gates. It has a reservoir of 800 km² (308.9 sq mi). The left bank hydroelectric power station generates of power and right bank generates of power.
The Srisailam project began in 1960, initially as a power project, across the Krishna, near Srisailam in Andhra Pradesh. After several delays, the main dam was finally completed twenty years later in 1981. In the meantime the project was converted into a multipurpose facility with a generating capacity of by its second stage which was expected to be completed in 1987. The dam is to provide water for an estimated 2000 square kilometre with its catchment area of 206040 square kilometre and water spread of 1595 square kilometre. Under the right branch canal 790 square kilometre in Kurnool and Kaddapa districts will have assured irrigation. From the initial modest estimate of for a power project the total cost of the multipurpose project was estimated to cross in its enlarged form. The 143 m (469 ft) high and 512 m (1,680 ft) wide dam has alone cost together with the installation of four generating sets of each. The right branch canal is estimated to cost and the initial investment of has been provided by the World Bank. The projected cost-benefit ratio of the project has been worked out at 1:1.91 at 10% interest on capital outlay.
On 2 October 2009, SriSailam dam experienced a record inflow which threatened the dam.