Tajikistan Upgrades Nurek Dam to Boost Power Supply Ahead of Winter Crunch
Tajikistan’s massive Nurek hydroelectric dam – the world’s second-tallest – is undergoing a sweeping modernization to shore up the nation’s electricity supply ahead of the demanding winter season. The 300-meter-high dam, completed in 1980 on the Vakhsh River near the Afghan border, has long been a strategic asset, supplying approximately 70% of Tajikistan’s power. As winter approaches and energy demand peaks, crews at the 3,015 MW hydropower plant are racing to upgrade aging turbines and infrastructure to ensure reliable electricity across the country. The overhaul, which began several years ago, promises not only to keep the lights on through harsh weather but also to boost Nurek’s capacity and extend the life of a facility that has defined Tajikistan’s energy landscape for five decades. A Soviet-Era Marvel at the Heart of Tajikistan’s Power Grid When it was completed in 1980, Nurek was the tallest dam in the world, a record it held for years as a feat of Soviet engineering, with the earth-fill embankment forming a vast reservoir of 98 km² that stores some 10.5 billion cubic meters of water. Between 1972 and 1979, nine giant hydro turbines were installed, giving Nurek an original design capacity of approximately 2,700 MW. Over time, improvements brought its output to just over 3,000 MW. In addition to producing power, the reservoir also supports major irrigation across the Amu Darya basin with one scheme alone - via the Dangara tunnel - irrigating roughly 70,000 hectares, underscoring its dual importance for energy and agriculture. For Tajikistan, a mountainous country of roughly 10.8 million people, Nurek has been nothing short of an economic lifeline. Hydropower accounts for roughly 98% of Tajikistan’s electricity generation, one of the highest shares of renewable energy in the world. This green energy dominance is largely thanks to Nurek and a network of smaller dams. However, the infrastructure is aging, and after 50 years of service, Nurek’s machinery had begun to falter. By the mid-2010s, winter electricity shortages had become common. During the cold months from late September to April, the hydrological cycle leaves Tajikistan with reduced river flow, just as heating needs spike. In those winters, rural areas often faced power rationing and outages, while the capital Dushanbe and other major cities narrowly avoided blackouts. Modernizing Nurek became essential to prevent a return to the severe energy crises of the past and to meet the country’s development goals. Upgrading and Expanding a Giant A comprehensive rehabilitation of Nurek began in earnest in recent years, backed by international financing, including the World Bank. The overhaul is split into phases: Phase I of the modernization — covering four of Nurek’s nine generating units along with major dam-safety works — is scheduled for completion by the end of 2026. Phase II will then refurbish the remaining six units. The upgrades are substantial - new high-efficiency Francis turbines will raise each unit’s capacity from 335 MW to 375 MW. In October 2022, the first upgraded unit came online, producing about 10% more power than before. By August...
