Introduction
Dams are among the most impressive structures humans have ever built. The tallest dams on Earth rise hundreds of meters above their foundations, holding back vast reservoirs of water used for hydroelectric power, irrigation, and flood control. Building these structures requires overcoming enormous engineering challenges in some of the most rugged terrain on the planet.
Here are the 10 tallest dams in the world, ranked by structural height from foundation to crest.
1. Jinping-I Dam
- Height: 305 m (1,001 ft)
- Location: Sichuan, China
- River: Yalong River
- Type: Double-curvature arch dam
- Completed: 2013
The Jinping-I Dam is the tallest dam in the world, standing 305 meters above its foundation in the deep gorges of the Yalong River in Sichuan Province. The dam generates 3,600 MW of hydroelectric power and required the construction of massive tunnels through the surrounding mountains.
The dam's arch design transfers the enormous water pressure to the canyon walls on either side. The Yalong River gorge was chosen because its narrow, V-shaped profile provides ideal abutments for an arch structure.
2. Nurek Dam
- Height: 300 m (984 ft)
- Location: Tajikistan
- River: Vakhsh River
- Type: Earth-fill embankment
- Completed: 1980
The Nurek Dam held the title of tallest dam in the world for over 30 years before Jinping-I surpassed it. Built during the Soviet era, it generates 3,000 MW of electricity, providing over 70% of Tajikistan's power supply.
The dam created the Nurek Reservoir, which stretches 70 km upstream. Tajikistan is currently building the Rogun Dam nearby, which could eventually reach 335 meters if completed to its full planned height.
3. Xiaowan Dam
- Height: 292 m (958 ft)
- Location: Yunnan, China
- River: Lancang (Mekong) River
- Type: Double-curvature arch dam
- Completed: 2010
The Xiaowan Dam is the tallest arch dam after Jinping-I and one of several massive dams China has built on the upper Mekong River. It generates 4,200 MW of power and its reservoir can store 15 billion cubic meters of water.
The dam has been controversial because the Mekong flows through six countries, and downstream nations like Laos, Cambodia, and Vietnam have raised concerns about reduced water flow affecting fisheries and agriculture.
4. Xiluodu Dam
- Height: 285.5 m (937 ft)
- Location: Sichuan/Yunnan border, China
- River: Jinsha River
- Type: Double-curvature arch dam
- Completed: 2013
Xiluodu Dam stands on the Jinsha River, the upper reach of the Yangtze. With a generating capacity of 13,860 MW, it is one of the most powerful hydroelectric stations in the world, second only to the Three Gorges and Itaipu dams.
The dam's reservoir displaced approximately 30,000 people. It was designed to reduce flooding downstream and provide water for irrigation in addition to power generation.
5. Grande Dixence Dam
- Height: 285 m (935 ft)
- Location: Valais, Switzerland
- River: Dixence River
- Type: Concrete gravity dam
- Completed: 1961
Grande Dixence is the tallest gravity dam in the world, relying purely on its massive weight to hold back water rather than an arch design. The dam contains 6 million cubic meters of concrete and generates 2,069 MW of power from the high Alpine water pressure.
Water is collected from 35 glaciers via 100 km of tunnels bored through the Alps. The dam is a major tourist attraction, and visitors can ride an elevator inside the structure to the crest for panoramic mountain views.
6. Inguri Dam
- Height: 271.5 m (891 ft)
- Location: Georgia
- River: Inguri River
- Type: Concrete arch dam
- Completed: 1987
The Inguri Dam is the tallest arch dam in Europe and was one of the most ambitious construction projects of the Soviet era. It generates 1,300 MW and supplies a significant portion of Georgia's electricity. The dam sits in a gorge in the Caucasus Mountains near the breakaway region of Abkhazia.
Remarkably, the power station is located on the Abkhazian side of the de facto border, while the dam itself is in Georgian-controlled territory, creating an unusual geopolitical arrangement.
7. Vajont Dam
- Height: 261.6 m (858 ft)
- Location: Veneto, Italy
- River: Vajont River
- Type: Double-curvature arch dam
- Completed: 1959
The Vajont Dam is one of the tallest in the world but is best known for the catastrophic disaster of 1963. A massive landslide sent 260 million cubic meters of rock into the reservoir, creating a 250-meter wave that overtopped the dam and destroyed the town of Longarone below, killing nearly 2,000 people.
The dam itself survived the disaster virtually intact, demonstrating its structural strength. It stands today as an unused monument and a sobering reminder of the importance of geological surveys.
8. Manuel Moreno Torres (Chicoasen) Dam
- Height: 261 m (856 ft)
- Location: Chiapas, Mexico
- River: Grijalva River
- Type: Rock-fill embankment
- Completed: 1980
The Chicoasen Dam is the tallest dam in North America and one of Mexico's most important hydroelectric facilities. It generates 2,430 MW and its reservoir, known as Canyons of Sumidero, is a popular tourist destination.
The Grijalva River canyon through which the dam was built is over 1,000 meters deep in places, providing the dramatic terrain necessary for such a tall structure.
9. Tehri Dam
- Height: 260.5 m (855 ft)
- Location: Uttarakhand, India
- River: Bhagirathi River
- Type: Rock and earth-fill embankment
- Completed: 2006
The Tehri Dam is the tallest dam in India and one of the tallest in Asia. It generates 1,000 MW of hydroelectric power and stores water for irrigation serving millions of farmers in the Ganges plain.
The dam's construction was highly controversial, requiring the displacement of over 100,000 people and submerging the old town of Tehri. Seismologists have also raised concerns about building such a large dam in a seismically active Himalayan zone.
10. Deriner Dam
- Height: 249 m (817 ft)
- Location: Artvin, Turkey
- River: Coruh River
- Type: Double-curvature arch dam
- Completed: 2012
The Deriner Dam is the tallest dam in Turkey and one of the tallest arch dams in the world. It generates 670 MW of power from the fast-flowing Coruh River in northeastern Turkey near the Georgian border.
The Coruh valley is one of the fastest-eroding landscapes in the world, and the dam's reservoir is expected to fill with sediment over the coming decades, a challenge common to many dams in mountainous regions.
Key Facts
- Jinping-I Dam is the first dam in history to exceed 300 meters in height.
- China has four of the top 10 tallest dams, reflecting its massive hydropower investment.
- The Rogun Dam in Tajikistan, if completed to full height (335 m), will become the world's tallest.
- Grande Dixence is the tallest gravity dam, relying on sheer weight rather than arch engineering.
- The Vajont Dam disaster of 1963 remains one of the worst engineering catastrophes in history.
Fun Facts
- Grande Dixence contains enough concrete to build a wall 1.5 meters high around the entire equator.
- The Vajont Dam survived a 260-million-cubic-meter landslide and a 250-meter wave virtually undamaged.
- The Inguri Dam straddles a geopolitical border — the dam is in Georgia, but the power plant is in Abkhazia.
- If Nurek Dam failed, the resulting flood would reach the Afghan border over 200 km downstream.
Final Thoughts
The tallest dams in the world represent some of humanity's most ambitious engineering achievements. Built in remote mountain gorges and river canyons, these structures harness the power of gravity and flowing water on a monumental scale. As the world seeks renewable energy, tall dams will continue to play a vital role in global power generation.