Central Asia is financing dams faster than it writes water rules

Central Asia’s two largest hydropower projects now have money behind them. Rogun in Tajikistan received a new World Bank grant in June, and Kambarata-1 in Kyrgyzstan has a cost estimate, an ownership split and more pledged finance than it needs. Neither project changes the fact that decides the region’s energy year: power is short in winter, water is needed in summer, and the same reservoirs serve both. The dams are being financed as regional assets. The rules for releasing their water are still written a season at a time.

The deficit is seasonal, and it is shared

Kyrgyzstan’s cabinet told an energy preparedness meeting in Bishkek on 10 August that it expects consumption of 19.6 billion kWh over the coming year against 15.5 billion kWh of domestic generation. The gap, 4.1 billion kWh, has to be imported. Water in Toktogul, the reservoir behind the plant that supplies about 40 per cent of the country’s electricity, was below the level of the same date a year earlier.

The reservoir’s spring figures show how narrow the margin became. Toktogul held 9.14 billion cubic metres on 1 January 2026 and 7 billion on 1 April. Its dead level, below which the plant cannot generate, is 6.5 billion. Kyrgyzstan got through the winter partly because Kazakhstan supplied more than 1.5 billion kWh between September 2025 and April 2026.

Kazakhstan is itself a net importer, though a shrinking one. Its deputy energy minister, Sungat Yesimkhanov, put 2025 production at 123.1 billion kWh and consumption at 124.6 billion kWh, a deficit of 1.5 billion kWh, down from 2.1 billion in 2024. He also said Kazakhstan imported 3.7 billion kWh from Russia in 2025. The two numbers measure different things: one is an annual net balance, the other a gross flow across one border, and the source does not reconcile them. What both show is that the region’s largest economy still leans on Russian supply in the months that matter, and plans to stop only from 2027, once 2.6 GW of new capacity commissioned in 2026 is running.

Why reservoirs are the answer and the argument

A hydropower reservoir in this region is a device for moving water through time. Running turbines hard in January uses water that downstream farmers in Uzbekistan and southern Kazakhstan want in July. Holding it back for irrigation leaves Kyrgyz and Tajik homes short in winter. Every large new dam adds storage, and storage can serve either season. Which one it serves is a political decision, not an engineering one.

For now that decision is made through short protocols. On 7 May 2026 energy and water ministers from the three Syr Darya states signed one in Tashkent fixing Toktogul release volumes and schedules for the next two months only. The schedule for July to September was left to a meeting in Bishkek in June. The arrangement works: Kyrgyzstan conserves water in winter, receives electricity from its neighbours, and releases the stored water in the growing season. But it is renegotiated several times a year, and its terms are not published in volumes that outsiders can check.

What the new money buys

Kambarata-1 is designed to take this bargain off the table. The plant, on the upper Naryn above Toktogul, is planned at 1,860 MW, with a 256-metre dam, a 5.4 billion cubic metre reservoir and output of 5.6 billion kWh a year. Construction is costed at $4.2 billion and pledges already total $5.6 billion. Kyrgyzstan is to hold 34 per cent, Uzbekistan and Kazakhstan 33 per cent each. Uzbekistan’s energy minister, Jorabek Mirzamahmudov, has described the design as supporting agriculture by "enabling controlled water releases during the summer growing season".

That is the whole case for the project. A second reservoir upstream lets Kyrgyzstan generate in winter from Kambarata while Toktogul keeps water for summer. Joint ownership gives the downstream states a seat at the board where release decisions are made, rather than a two-month protocol. The third round of trilateral talks on the intergovernmental agreement closed in Almaty on 23 September, after rounds in Bishkek and Tashkent in the spring, with the World Bank attending as an observer. The official statement reported "progress in resolving certain outstanding provisions" and did not say which ones remain open. That silence is the most important thing in it.

Rogun is further along and less shared. On 30 June the World Bank’s board approved a $300 million IDA grant for the project’s second phase. The Bank expects the plant to generate 14,400 GWh a year, roughly 60 per cent of Tajikistan’s current output, and says it will reduce chronic winter shortages and allow exports to Kazakhstan and Uzbekistan. Eleven other lenders, from the Asian Development Bank and the AIIB to Gulf development funds and the European Investment Bank, are listed as co-financiers. The Bank frames the regional benefit as exported electricity. Its announcement says nothing about release schedules or downstream flows, and there is no Rogun equivalent of the Kambarata ownership split to give downstream states a formal say in how the reservoir is filled and run.

The Amu Darya has a new claimant

The Amu Darya basin has a second new claimant. Afghanistan’s Qosh Tepa canal, about 290 kilometres long, is planned to irrigate roughly 550,000 hectares. Afghan officials put its intended withdrawal at 6 to 10 cubic kilometres a year. A former Afghan minister, Najib Aga Fahim, has said capacity could reach 12 cubic kilometres, while also arguing the canal would take no more than 12 per cent of the river’s total flow. Against an annual runoff estimated at about 75 cubic kilometres, the officials’ range is roughly 8 to 13 per cent. The estimates differ because they assume different operating levels and different baselines for a river whose flow has itself declined. None of them is small.

Add Rogun, a new upstream reservoir whose operating rules downstream states do not help set, and Uzbekistan and Turkmenistan face less certain summer water at the same time as they are being offered Tajik winter power. That trade can be good for everyone. It cannot be priced until someone writes down how much water moves when.

A shared grid shares its failures

The August blackout made the stakes concrete. At 14:37 on 14 August, two 300 MW units at Toktogul tripped during extreme heat. Roughly 600 MW left the system, and outages spread across Kyrgyzstan, Kazakhstan, Uzbekistan and Tajikistan before power returned within hours. Kyrgyzstan’s energy ministry acknowledged the technical failure three days later but disputed responsibility for the knock-on effects in neighbouring states.

That dispute is a small version of the one the new dams will create. A synchronised grid is what lets Kyrgyz and Tajik hydropower cover Kazakh and Uzbek winter demand. It also means a fault, or a release decision, in one country lands in four. The region is building interdependence faster than it is building the institutions to manage it.

What to watch

The first signal is the text of the Kambarata-1 intergovernmental agreement. If it fixes release schedules, or a formula for them, and gives the joint company’s board authority over operating rules, the project will have done something no protocol has done: make the water-for-power trade durable. If it settles only finance and ownership and leaves water to annual talks, the plant will add capacity without removing the seasonal bargaining.

The second is this winter’s Toktogul balance. With the reservoir starting below last year’s level and a 4.1 billion kWh import requirement, the autumn protocol will show whether Kazakhstan, now close to balance, and Uzbekistan can again supply enough power to let Kyrgyzstan hold water back. The third is whether Rogun’s lenders attach any downstream consultation to future tranches. Of the three, the Kambarata text matters most, because it will set the template for how the region treats every reservoir that follows.

Sources

• World Bank — Advancing Energy Security and Jobs Through the Transformative Rogun Hydropower Project, 30 June 2026
• Asia-Plus — Qosh-Tepa Canal: new water source or growing threat to Central Asia?, 10 August 2026
• Times of Central Asia — Kyrgyzstan, Uzbekistan, Kazakhstan Move Forward with $4.2 Billion Kambarata-1 Hydropower Project, 8 June 2026
• Trend — Kazakhstan, Kyrgyzstan, and Uzbekistan hold talks on Kambarata-1 HPP, 23 September 2026
• Times of Central Asia — Kazakhstan, Kyrgyzstan, Uzbekistan Agree on Toktogul Water Releases, May 2026
• Daryo — Kyrgyzstan plans to import 4.1bn kWh of electricity for winter 2026–27, 12 August 2026
• Interfax — Kazakhstan intends to abandon electricity imports from Russia starting 2027, 5 May 2026
• Astana Times — One Plant Tripped in Kyrgyzstan, Four Countries Go Dark, 16 September 2026