# Which Is the Biggest Dam in India? India is known for its vast network of rivers and water reservoirs, which play a crucial role in irrigation, power generation, and flood control. Among these, dams stand as monumental structures that support the country’s agricultural and industrial growth. When people ask, *“Which is the biggest dam in India?”* — the answer is clear: **the Tehri Dam** in Uttarakhand holds that title. Let’s dive deeper into what makes the Tehri Dam the biggest in India, its key features, importance, and a look at other major dams that power the nation’s water and energy needs. --- ## The Biggest Dam in India: Tehri Dam The **Tehri Dam**, located on the **Bhagirathi River** in the state of **Uttarakhand**, is the **largest dam in India** in terms of **height and capacity**. It’s one of the tallest dams in the world and a vital component of India’s hydroelectric and irrigation system. ### Key Facts about Tehri Dam * **Location:** New Tehri, Uttarakhand * **River:** Bhagirathi River * **Type:** Rock and earth-fill embankment dam * **Height:** 260.5 meters (855 feet) — highest in India * **Length:** 575 meters * **Reservoir Capacity:** 4.0 cubic kilometers (around 4 billion cubic meters) * **Installed Power Capacity:** 1,000 MW (expandable to 2,400 MW with pumped storage) * **Construction Started:** 1978 * **Completion and Operation:** 2006 * **Managed By:** Tehri Hydro Development Corporation (THDC India Ltd.) The Tehri Dam stands as a marvel of modern engineering and a lifeline for millions of people across northern India. --- ## Why Tehri Dam Is the Biggest in India The Tehri Dam earns its title as the biggest dam in India because of its **massive height**, **reservoir capacity**, and **power generation capability**. ### 1\. Height Advantage At 260.5 meters, it’s not just the tallest in India but also ranks among the top 10 highest dams globally. ### 2\. Massive Water Storage It stores nearly **4,000 million cubic meters of water**, making it India’s largest water reservoir. ### 3\. Hydroelectric Power Generation The dam’s hydropower plant generates about **1,000 megawatts (MW)** of electricity, meeting the needs of Uttarakhand, Delhi, Punjab, Haryana, and Uttar Pradesh. ### 4\. Multipurpose Utility Beyond power generation, the Tehri Dam: * Supplies drinking water to major cities including Delhi. * Provides irrigation water to over **2.7 lakh hectares** of agricultural land. * Helps control floods in the Ganga basin during heavy monsoon seasons. --- ## Construction and Design The Tehri Dam was constructed using **rock-fill and earth-core techniques**, designed to withstand earthquakes and extreme weather. * The project faced many delays and controversies due to environmental and displacement concerns. * Engineers had to ensure that the dam could handle seismic activity since Uttarakhand lies in an earthquake-prone zone. * Today, it stands as one of India’s safest and most efficient large dams, operated under strict monitoring. --- ## Importance of the Tehri Dam The Tehri Dam contributes significantly to India’s energy and water security. ### Major Benefits: * **Electricity Generation:** Supports multiple states with renewable hydropower. * **Irrigation:** Provides reliable water for agriculture, boosting crop production. * **Flood Control:** Reduces flood risks in downstream areas during monsoon. * **Water Supply:** Delivers clean drinking water to millions, including residents of Delhi and surrounding regions. * **Tourism:** The Tehri Lake formed by the dam is now a popular adventure and eco-tourism destination. --- ## Other Major Dams in India While Tehri is the biggest dam in India, several other dams hold great importance for their size, design, and contribution. Here’s a look at some of them: | **Dam Name** | **State** | **River** | **Height (m)** | **Type** | **Key Use** | | --- | --- | --- | --- | --- | --- | | **Bhakra Nangal Dam** | Himachal Pradesh & Punjab | Sutlej | 226 m | Concrete Gravity | Power & Irrigation | | **Sardar Sarovar Dam** | Gujarat | Narmada | 163 m | Gravity | Water Supply & Power | | **Hirakud Dam** | Odisha | Mahanadi | 60.9 m | Earthfill | Flood Control & Irrigation | | **Nagarjuna Sagar Dam** | Telangana | Krishna | 124 m | Masonry | Irrigation & Power | | **Indira Sagar Dam** | Madhya Pradesh | Narmada | 92 m | Concrete Gravity | Power Generation | | **Idukki Dam** | Kerala | Periyar | 168.9 m | Arch Dam | Hydroelectric | | **Rihand Dam** | Uttar Pradesh | Rihand | 91 m | Concrete Gravity | Irrigation & Power | | **Koyna Dam** | Maharashtra | Koyna | 103 m | Rubble Concrete | Power Generation | Each of these dams plays a major role in India’s regional water management and energy supply network. --- ## The Economic and Environmental Impact While large dams like Tehri are crucial for development, they also bring challenges. ### Positive Impacts * Boost in renewable energy capacity. * Increased irrigation and agricultural productivity. * Improved flood management and water storage. ### Environmental Concerns * Submergence of villages and forests. * Displacement of local communities. * Ecological imbalance and risk to aquatic life. Efforts have been made to minimize these effects through **resettlement programs, environmental monitoring, and sustainable tourism initiatives**. --- ## Tehri Dam vs. Bhakra Nangal Dam People often compare **Tehri Dam** and **Bhakra Nangal Dam** since both are monumental structures. | **Feature** | **Tehri Dam** | **Bhakra Nangal Dam** | | --- | --- | --- | | **Location** | Uttarakhand | Himachal Pradesh–Punjab Border | | **River** | Bhagirathi | Sutlej | | **Height** | 260.5 m | 226 m | | **Type** | Rock & Earth-fill | Concrete Gravity | | **Power Capacity** | 1,000 MW | 1,325 MW | | **Completion** | 2006 | 1963 | While Bhakra Nangal is older and more iconic, Tehri surpasses it in **height and storage capacity**, making it the biggest dam in India overall. --- ## Interesting Facts About Tehri Dam * It can withstand an earthquake measuring up to **8.5 magnitude** on the Richter scale. * The Tehri reservoir, known as **Tehri Lake**, has become a popular site for boating, jet skiing, and paragliding. * The project displaced around **100,000 people**, leading to the creation of the new town **New Tehri**. * It contributes significantly to the **National Hydroelectric Grid**. --- ## Conclusion To sum up, the **Tehri Dam in Uttarakhand** is the **biggest dam in India**, both in terms of height and reservoir capacity. Built on the Bhagirathi River, it stands as a symbol of India’s engineering excellence and commitment to renewable energy and water management. However, India’s dam network extends far beyond Tehri — with structures like Bhakra Nangal, Sardar Sarovar, and Hirakud ensuring that water reaches every corner of the country. Together, they make India one of the global leaders in hydro-infrastructure and sustainable development. --- ## FAQs ### Which is the biggest dam in India? The **Tehri Dam** in Uttarakhand is the biggest dam in India, with a height of 260.5 meters and a capacity of 4 billion cubic meters of water. ### Which is the longest dam in India? The **Hirakud Dam** in Odisha is the longest dam in India, stretching over 25.8 kilometers across the Mahanadi River. ### Which is the oldest dam in India? The **Kallanai Dam** (Grand Anicut) in Tamil Nadu, built around the 2nd century AD by King Karikalan of the Chola dynasty, is the oldest functional dam in India. ### Which dam produces the most electricity in India? The **Koyna Dam** in Maharashtra is among India’s top hydroelectric dams, generating around 1,960 MW of power. ### What is the main purpose of the Tehri Dam? The Tehri Dam serves multiple purposes — hydroelectric power generation, irrigation, drinking water supply, and flood control — benefiting several northern states of India.