The Dam and the Winter
Almost all of Tajikistan's electricity comes from water, and in winter the water is locked up as ice upstream — much of the country has spent two decades on a few hours of power a day from November to March. The fix has been under construction since 1976, and at 335 metres it would be the tallest dam in the world.
The road south-east out of Dushanbe passes Nurek about an hour in. The dam there is 300 metres high, it was completed in 1980, and it was the tallest in the world for thirty-three years until a Chinese dam on the Yalong overtook it in 2013. It still generates the majority of Tajikistan's electricity, in a country that draws almost all of its power from running water and very little of it from anything else. On paper that is an enviable position: no fuel imports, no emissions, a river that refills itself every summer.
In practice it means that from November the lights go out. The Vakhsh is fed by snowmelt and glaciers, so its flow peaks in July and collapses in January — precisely inverted from demand, because January is when people heat their houses. Rural districts have been rationed to a handful of hours of electricity a day through the winter for the better part of twenty years. The World Bank has put the winter shortfall at roughly a quarter of what the country needs. Everything Tajikistan has done about energy for the last fifty years is an attempt to solve that one sentence.
A hole in the mountain since 1976
Work on Rogun, upstream of Nurek on the same river, began in 1976. It was a Soviet project of the appropriate scale: a rockfill embankment designed to stand 335 metres, which would make it the tallest dam ever built, feeding six turbines of 600 megawatts each. Then the Union dissolved, Tajikistan fell into a civil war that ran from 1992 to 1997, and in May 1993 a flood took out the partly finished works and put the site back to something close to nothing. For the next fifteen years Rogun existed mainly as a diversion tunnel, a bad debt and a national argument.
Why the geology is the expensive part
The site is not a straightforward one. The Ionakhsh fault runs beneath it, in a valley with real seismic history, and there is a salt dome under the right bank which has to be prevented from dissolving over the dam's lifetime — the standard answer is a grout curtain, maintained more or less indefinitely. The studies the World Bank commissioned and published in 2014 concluded the thing could be built safely to international standards if a long list of conditions were met. They did not say it would be cheap, and the design that emerged holds a reservoir of around 13 cubic kilometres, filled through the summer and released through the winter. That storage is the entire point.
The reservoir that would end Tajikistan's winter blackouts is the same reservoir that would hold back water Uzbekistan's cotton needs in summer. There is no version of the dam that does one and not the other.
The argument downstream
The Vakhsh meets the Panj in the south-west corner of the country and the two become the Amu Darya, which crosses Turkmenistan and Uzbekistan and used to reach the Aral Sea. Uzbekistan irrigates cotton with it. For most of the 2000s Tashkent treated Rogun as a threat rather than a project, and in 2012 President Islam Karimov said publicly that water disputes in Central Asia could deteriorate into serious conflict and even war. Rail freight to Tajikistan was obstructed; gas supply was cut. Then Karimov died in 2016, Shavkat Mirziyoyev reversed almost the entire regional policy, and by 2018 Uzbekistan had stopped objecting and started discussing buying the electricity. The hydrology did not change. The politics did.
Who is paying
The financing is where the story gets uncomfortable. In 2010 the government sold shares in Rogun to its own citizens, raising something in the order of $180 million, in a campaign that state employees and pensioners described as effectively compulsory and that the IMF criticised at the time. In 2017 Tajikistan issued a $500 million eurobond at 7.125 per cent, an expensive rate for a country of that size. Construction restarted in 2016 under a contract with the Italian firm Salini Impregilo, now Webuild, worth some $3.9 billion. The first turbine was commissioned in November 2018 and the second in September 2019, both running at reduced head because the dam around them is nowhere near its design height.
The numbers have kept moving. Standard & Poor's put the remaining cost of finishing to full specification at roughly $6.4 billion; Tajik officials now cite a total above $9 billion, against a national economy of about $14 billion a year, which puts the finished dam at something close to two-thirds of everything the country produces in twelve months. In December 2024 the World Bank approved a $350 million grant, with $270 million from the Asian Infrastructure Investment Bank and a $100 million line from the Kuwait Fund alongside it. It then paused further disbursement pending a credible plan for servicing the debt, firm long-term export contracts and dam safety arrangements — which is a polite way of asking who buys the power. The intended answer is CASA-1000, a 1,300-kilometre transmission line to Pakistan approved in 2014 at about $1.2 billion, whose middle section runs through Afghanistan and has been stalled since 2021.
What a traveller actually sees
Not much of the dam. The site is closed and the road past it is unremarkable. What you see instead is the accounting, distributed across the country: generators outside guesthouses in Khorog, homestays in the Wakhan with one low-wattage bulb and a solar panel on the roof, villages on the plateau where the grid is a formality and the heat comes from dung and scrub. In summer, when you will be travelling, none of it looks like a crisis — the rivers are full, the turbines are turning, and Tajikistan is exporting surplus power to its neighbours at the very moment its own winter deficit is being financed at seven per cent. That mismatch is worth carrying up the Panj road, because it explains the country better than the scenery does: a state holding more hydropower potential per head of population than almost anywhere on earth has been unable to keep its own lights on in January for half a century, and its answer is a structure begun under Brezhnev that has now outlasted the union that started it, a civil war, a currency and every cost estimate anyone has produced for it.