▪️Several dams have been constructed in the valley, for the generation of
hydroelectric power.
▪️ The valley is called “the Ruhr of India”.
▪️The first dam was built across the Barakar River, a tributary of the
Damodar river.
▪️ It used to cause devastating floods as a result of which it earned the name "Sorrow of Bengal".
▪️ Now the river is tamed by constructing numerous dams.
▪️ It joins the Hugli River 48 km below Kolkata
