Rogun Dam in Tajikistan: Progress Toward the World's Tallest Dam

The Rogun Dam on the Vakhsh River in Tajikistan is still under construction. It is designed to reach 335 metres, which would make it the world's tallest dam once finished. A GKToday report published on 2 October 2026 says that by August 2026 the structure had reached about 190 metres. Two of the six planned 600 MW generating units are already operational. The dam is therefore well short of its final height, and the project is ongoing rather than completed.

What the sources report, and when

The two sources describe different moments, so their dates should not be mixed up.

• Source publication date: GKToday published its report on 2 October 2026. It describes construction status "by August 2026". The exact day of any milestone is not given.
• Earlier company note: a press note from the builder, Webuild, is dated 28 August 2025. It says the dam had almost reached 1,110 m above sea level and that the President of Tajikistan had visited the site.
• Not an event of one day: there is no single inauguration or completion date. This is a progress update on a long-running project.

Why Rogun matters

Energy security in Tajikistan

Webuild's note says that around 70% of Tajikistan's population experiences power outages, especially in winter. It says Rogun would double the country's energy production. GKToday also links the project to winter electricity shortages. Both statements are about the project's purpose, and neither is an independently verified outcome.

Regional electricity trade

GKToday says the completed plant is expected to produce about 14,400 GWh of renewable electricity a year. It links this output to domestic supply and to planned exports to Kazakhstan and Uzbekistan. Those exports are plans, not reported achievements.

River-basin context

The Vakhsh is a major tributary of the Amu Darya system. That places Rogun within wider Central Asian water and energy questions. The sources do not discuss any dispute or agreement over water sharing, so this note does not either.

Key facts at a glance

Construction progress

GKToday reports that about 49 million cubic metres of material had been placed by August 2026. It also reports more than 500,000 linear metres of drilling for foundation work and the grout curtain. The site uses underground diversion tunnels and foundation consolidation works.

Webuild's 2025 note describes progress over the preceding year. It reports a rise of as much as 100 metres, about 13 million cubic metres of embankment material and over 180,000 linear metres of injections. These are the builder's own figures.

Financing

• In June 2026, the World Bank approved an additional 300 million grant for the project's second phase. GKToday says this takes total planned World Bank financing to 650 million. The source does not name the currency.
• Tajikistan has planned at least 10 billion somoni for Rogun in 2026.
• The estimated total completion cost is about $5.8 billion by 2035, which is an estimate and not a confirmed completion date.

Limits of the evidence

• The post-2025 figures come from one secondary source, GKToday. It does not cite an underlying project or government document.
• The Webuild note is a contractor's press release and is promotional in tone. Its claims about reactor equivalence and about supplying around 10 million people are not independently verified here.
• The two sources use different measures: elevation above sea level and dam height. They cannot be fully reconciled. GKToday gives 1,155 m elevation in August 2026, against almost 1,110 m in Webuild's August 2025 note. Whether this matches Webuild's reported rise of about 100 m in a year is unclear.
• The capacity figure differs between 3,600 MW (six units of 600 MW) and 3,780 MW. The source does not explain why.
• The sources do not say which dam is currently the tallest in the world.

Exam-relevant context

This topic may suit "places in news", geography and science-and-technology revision. No source indicates that it will be asked in any exam. Points worth noting:

• Hydropower is electricity generated from the energy of flowing or falling water.
• A rockfill dam uses compacted rock fragments, and a clay core reduces seepage through the structure.
• The Vakhsh River is part of the Amu Darya basin.
• Rogun is planned to have six turbines of 600 MW each, and two units are operational as of the August 2026 status reported.

Frequently asked questions

Is the Rogun Dam the world's tallest dam now?

The sources say it will be the tallest after completion, at a planned 335 m. By August 2026 it had reached about 190 m, so it is not yet at its design height.

Is the Rogun project complete?

No. Two units are operational. The third is scheduled for Q3 2027, and the total cost is estimated at about $5.8 billion by 2035.

Where is Rogun?

It is on the Vakhsh River in Tajikistan, upstream of the Nurek Hydropower Plant and about 110 km from Dushanbe.