Inter-ministerial review of Đerdap 3
Romanian authorities are conducting a comprehensive review of the proposed Đerdap 3 pumped-storage hydropower project, also referred to as Iron Gates 3. The assessment is being carried out through an inter-ministerial process that examines economic viability, environmental impact, and potential effects on Romania’s electricity system. Romanian officials said the country remains generally supportive of the initiative, while no final decision has been made.
The review comes as attention returns to a scheme discussed for decades but not yet moved into the construction phase. The project is being evaluated in parallel with broader regional needs for electricity system flexibility, according to the information released by the Romanian Government.
US Embassy call for interest in Belgrade
Interest in the project has also been highlighted by activity in Serbia. The US Embassy in Belgrade launched a call for expressions of interest intended to attract international participation in the Đerdap 3 development. This step follows renewed attention on the pumped-storage plan.
The call for interest is linked to a project that would require cross-border coordination and long-term planning before any construction work begins.
Danube pumped-storage design, capacity and timeline
The proposed facility would be built on the Danube River as a large-scale pumped-storage hydropower plant. Its installed capacity is estimated at approximately 2,400 MW, with the possibility of adding an extra 400 MW of renewable energy sources, including wind and solar power. Current estimates place the investment value at around €2.6 billion, with full completion targeted for 2038.
The project is structured around cooperation between Serbia and Romania. It has drawn debate on both sides of the border, including discussion of how it could support energy storage and grid balancing needs and how it might affect environmental conditions.
Potential implications for Iron Gates I and II operations
Romanian institutions are focusing on how Đerdap 3 could influence operations at existing hydropower assets on the same river system. In particular, they are examining potential effects on Iron Gates I and Iron Gates II, which have been jointly managed by Serbia and Romania for decades. Any impact on these strategically important plants is described as a key factor within the ongoing assessment.
The cross-border nature of the scheme extends beyond planning into operational considerations for existing generation infrastructure. Several major international companies have shown interest over the years, including Bechtel, which took part in preparatory technical studies and early development activities.
Decision process expected to remain detailed
The next steps are expected to take time due to multiple factors cited in connection with the project. These include technical complexity, environmental sensitivity, and cross-border coordination requirements between Serbia and Romania. As a result, the final decision-making process is expected to remain lengthy and highly detailed.
