The dam on the river Ganges is known as the Tehri Dam. It is located in the Indian state of Uttarakhand and is one of the largest hydroelectric projects in the country. The construction of the Tehri Dam began in 1978 and was completed in 2006.

Importance of Tehri Dam:
The Tehri Dam holds significant importance for various reasons:

1. Hydroelectric Power Generation: The primary purpose of the Tehri Dam is to generate hydroelectric power. It has a capacity of producing 1,000 megawatts of electricity, contributing to the energy requirements of Uttarakhand and neighboring states.

2. Flood Control: Another crucial function of the Tehri Dam is flood control. The dam helps in regulating the flow of water during the monsoon season, preventing devastating floods downstream.

3. Irrigation: The dam also facilitates irrigation by providing water to agricultural lands in the region. It helps in enhancing agricultural productivity and supporting the livelihoods of farmers.

4. Tourism: The Tehri Dam has become a popular tourist attraction due to its scenic location and the reservoir formed by it. People visit the dam to enjoy boating, angling, and other recreational activities.

Technical Details of Tehri Dam:
Here are some technical details about the Tehri Dam:

1. Height: The dam stands at a height of about 260 meters, making it one of the tallest dams in India.

2. Reservoir Capacity: The dam forms a massive reservoir known as Tehri Lake, with a capacity of approximately 2.6 billion cubic meters.

3. Earthquake Resistance: The Tehri Dam has been designed to withstand earthquakes of magnitudes up to 8 on the Richter scale. Special measures have been taken to ensure its stability and safety.

4. Environmental Impact: The construction of the Tehri Dam resulted in the displacement of numerous villages and the submergence of forest areas. Efforts have been made to mitigate the environmental impact and provide rehabilitation to the affected communities.

Conclusion:
The Tehri Dam on the river Ganges is a remarkable engineering feat that serves multiple purposes. It generates hydroelectric power, controls floods, supports irrigation, and attracts tourists. With its immense height and capacity, the dam stands as a symbol of India's progress in harnessing the power of water resources for sustainable development.

Uttarakhand's Tehri Dam, is one of the largest dam in India and was constructed in the 2006 across Ganges River.