As of 2026-10-12, Idriss I Dam tops the list with 1 km3.
- #1 Idriss I Dam — 1 km3
dam in Fes
The Idriss I Dam, also known as the Idriss the First Dam, is a gravity dam on the Inaouen River, a tributary of the Sebou River. The dam is situated in the Gharb Basin and is located 27 kilometres (17 mi) northeast of Fes in Taza and Taounate Province, Morocco. The dam serves to provide irrigation water for 72,300 hectares of land and its power plant generates 66 GWh of electricity annually. It is named after Idriss I. It has faced criticism since it failed to deliver irrigation to the... Read more on Wikipedia.
Wikidata - #2 Moragahakanda Dam — 1 km3
dam in Elahera, North Central Province
The Moragahakanda Dam, officially Kulasinghe Reservoir, is a large gravity dam, and the main component of the larger and more complex Moragahakanda — Kalu Ganga Project, across the Amban River at Elahera, in the Matale District of Sri Lanka. Construction began on 25 January 2007 and was completed in 2018. The maiden water release of the dam was in January 2017. Morgahakanda/Kaluganga project is the last of the Great Mahaveli project Read more on Wikipedia.
Wikidata - #3 Chalillo Dam — 0 km3
dam in Cayo
The Chalillo Dam is a gravity dam on the Macal River about 33 km (21 mi) south of San Ignacio in Cayo District, Belize. Chalillo Dam's maximum capacity is 7.0 MW. The dam was constructed by Sinohydro of Beijing, China, between 2002 and 2005 with the primary purpose of hydroelectric power production. The project budget was approximately US 30 million. Its construction generated controversy over its effect on the surrounding rain forest. Read more on Wikipedia.
Wikidata - #4 Génissiat Dam — 0 km3
dam
The Génissiat Dam is a hydroelectric dam on the Rhône in France near the village of Injoux-Génissiat. Construction began in 1937, but was delayed by World War II, and the dam did not start generating power until 1948. By 1949 it had the greatest capacity of any dam in Europe. Read more on Wikipedia.
Wikidata - #5 Enciso Dam — 0 km3
Dam in Spain
source Wikidata - #6 Asadiyeh Dam — 0 km3
dam in Darmian County, Iran
source Wikidata - #7 Presa de Cúber — 0 km3 source Wikidata
- #8 Grand Ethiopian Renaissance Dam — 0 km3
gravity dam on the Blue Nile River in Ethiopia
The Grand Ethiopian Renaissance Dam, formerly known as the Millennium Dam and sometimes referred to as the Hidase Dam, is a gravity dam on the Blue Nile River in Ethiopia. The dam is in the Metekel Zone of the Benishangul-Gumuz Region, close to the border with Sudan. Read more on Wikipedia.
Wikidata - #9 Grande Dixence dam — 0 km3
concrete gravity dam on the Dixence River in Hérémence in the canton of Valais, Switzerland
The Grande Dixence Dam is a concrete gravity dam on the Dixence at the head of the Val d'Hérémence in the canton of Valais in Switzerland. At 285 m (935 ft) high, it is the tallest gravity dam in the world, seventh tallest dam overall, and the tallest dam in Europe. It is part of the Cleuson-Dixence Complex. With the primary purpose of hydroelectric power generation, the dam fuels four power stations, totaling the installed capacity to 2,069 MW, generating approximately 2,000 GWh annually,... Read more on Wikipedia.
Wikidata - #10 Golestan Dam — 0 km3
dam in Torqabeh and Shandiz County, Iranian national heritage site
source Wikidata