The Damodar River originates in Jharkhand's Chotanagpur Plateau and flows into West Bengal. It is called "Sorrow of Bengal" due to frequent devastating floods in Bengal's plains historically. Major floods occurred in years like 1770, 1855, 1913, and 1943. The Damodar Valley Corporation was established in 1948 to build dams like Tilaiya in 1953 on the Barakar tributary to control floods and promote irrigation and power generation.
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