The Tehri Dam is built on the Bhagirathi River.

The Bhagirathi River is one of the main tributaries of the Ganges River in northern India. It originates from the Gangotri Glacier, which is located in the state of Uttarakhand. The river then flows through the mountainous regions of Uttarakhand, passing through several towns and villages before eventually merging with the Alaknanda River at Devprayag to form the Ganges River.

The Tehri Dam is located in the state of Uttarakhand, near the town of Tehri. It is a multipurpose rock and earth-fill embankment dam that was constructed to harness the potential of the Bhagirathi River for various purposes such as hydroelectric power generation, irrigation, and flood control. The dam is one of the largest hydroelectric projects in India and plays a significant role in meeting the energy demands of the region.

The construction of the Tehri Dam began in 1978 and was completed in 2006. It involved the relocation of thousands of people from the area, including several villages and towns that were submerged due to the formation of the Tehri Reservoir. The dam stands at a height of about 260 meters and has a storage capacity of approximately 2.6 billion cubic meters of water.

The Tehri Dam not only generates a substantial amount of electricity but also helps in regulating the flow of the Bhagirathi River, which is crucial for preventing floods in downstream areas. Additionally, the dam provides water for irrigation purposes, thus supporting agriculture in the region. It has also become a popular tourist attraction, attracting visitors from all over the country who come to witness the grandeur of the dam and enjoy the scenic beauty of the surrounding area.

In conclusion, the Tehri Dam is built on the Bhagirathi River in Uttarakhand, India. It is a multipurpose dam that serves various purposes, including hydroelectric power generation, irrigation, and flood control.