10 massive dams around the world you probably haven’t heard of! The world is home to some of the most impressive and monumental dams, each serving as a testament to human engineering and the quest to harness natural resources. These dams play crucial roles in energy generation, flood control, irrigation, and water supply. As the world continues to develop, large-scale projects are also emerging, such as the proposed mega-dam on the Brahmaputra River in Tibet, which is set to surpass all others in size and cost.

The Three Gorges Dam, located in China, currently holds the title as the largest dam in the world. It spans a remarkable 2.3 kilometers (1.4 miles) in length and reaches a height of 185 meters (607 feet). The dam’s reservoir is massive, holding 39.3 cubic kilometers (9.43 cubic miles) of water, which makes it a crucial piece of infrastructure for China’s power grid. The Three Gorges Dam, which took 17 years to complete, generates an enormous amount of electricity and plays a pivotal role in flood control and river navigation.

Situated on the Paraná River, which is shared by Brazil and Paraguay, the Itaipu Dam is another giant in the world of hydropower. Completed in 1987, the Itaipu Dam spans 7,919 meters (26,000 feet) in length and reaches a height of 196 meters (643 feet). The expansive reservoir covers 1,350 square kilometers, holding 29.3 cubic kilometers of water. It has a maximum power generation capacity of 14 GW, supplying electricity to both countries. Itaipu continues to be one of the most significant hydroelectric power producers globally.

China’s Xiluodu Dam, located on the Jinsha River, is among the largest and tallest in the world. Standing at 278 meters (912 feet) high and stretching 700 meters (2,297 feet) across its crest, the Xiluodu Dam is an essential contributor to China’s renewable energy infrastructure. The dam’s reservoir holds 12.67 billion cubic meters of water, making it a vital resource for power generation in southwestern China. The dam is a key part of China’s push to increase its renewable energy capacity, further reducing the nation’s reliance on coal.

In Venezuela, the Guri Dam, completed after more than a decade of construction, has long been an energy lifeline for the country. The dam, built on the Caroní River, has a crest length of 1,300 meters (4,265 feet) and provides around 47,000 gigawatt-hours (GWh) of energy annually. It plays a crucial role in supplying electricity to the national grid and is central to Venezuela’s energy infrastructure.

Brazil’s Tucuruí Dam, located on the Tocantins River, also ranks among the largest in terms of size and output. With a length of 3,758 meters (12,327 feet) and a height of 89 meters (292 feet), the dam is another key player in Brazil’s energy system. Completed in 1984, the Tucuruí Dam is capable of generating substantial amounts of power, supporting Brazil’s growing industrial and urban needs.

In the United States, the Grand Coulee Dam is one of the oldest and most significant hydroelectric projects. Located in Washington State, the dam’s powerhouse houses 33 generating units, providing a combined output of more than 6,800 megawatts of electricity. While it may not be as physically massive as some of the newer dams, its efficiency and age make it one of the most critical hydroelectric plants in the world.

The Longtan Dam, built on the Hongshui River in China’s Guangxi Zhuang Autonomous Region, is another major infrastructure feat. The dam holds a staggering 27.3 billion cubic meters of water, and its rapid construction, completed in just 8 years, showcases China’s capability in executing large-scale engineering projects.

Russia’s Sayano-Shushenskaya Dam, completed in 1978 on the Yenisei River, stands as one of the tallest in the world at 242 meters (794 feet). Despite facing setbacks, such as a catastrophic turbine failure that caused significant damage and loss of life, the dam remains a significant energy source for Siberia.

The Krasnoyarsk Dam, also located on the Yenisei River in Russia, is another massive structure that plays a vital role in the region’s hydropower generation. Standing at 124 meters (407 feet) and stretching 1,065 meters across, the Krasnoyarsk Dam is a critical part of Russia’s energy infrastructure.

Lastly, the Robert-Bourassa Dam, completed in 1981 on the La Grande River in northern Quebec, Canada, is a key component of the country’s hydroelectric system. The dam creates the Robert Bourassa Reservoir, which holds vast amounts of water and generates substantial electricity, contributing significantly to Canada’s energy production.

As nations around the world continue to invest in massive hydroelectric projects, the coming construction of the largest dam on the Brahmaputra River in Tibet promises to eclipse all existing dams in both size and cost. The project has sparked concerns in neighboring countries like India and Bangladesh, as the dam’s potential impacts on water flow could significantly affect the region. Nevertheless, these immense engineering feats showcase the continuing drive to harness nature’s power for the benefit of millions, fueling both economic growth and geopolitical tensions in the process.