Romanian authorities are conducting a comprehensive review of the proposed Đerdap 3 (Iron Gates 3) pumped-storage hydropower project, a development that could become one of the largest energy investments in Southeastern Europe.
According to information released by the Romanian Government, the project is currently undergoing an inter-ministerial assessment that evaluates its economic viability, environmental impact, and potential effects on Romania’s electricity system. Officials have stated that the country remains generally supportive of the initiative, although no final decision has yet been made as the review process continues.
The renewed attention surrounding HPP Đerdap 3 follows shortly after the US Embassy in Belgrade launched a call for expressions of interest aimed at attracting international participation in the project. This marks another step forward for a scheme that has been discussed for decades but has not yet entered the construction phase.
Planned as a large-scale pumped-storage facility on the Danube River, the project would have an installed capacity of approximately 2,400 MW, with the possibility of integrating an additional 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 based on cooperation between Serbia and Romania and has generated significant debate on both sides of the border. Discussions have focused not only on its role in supporting future energy storage and grid balancing needs, but also on its potential environmental consequences.
Romanian institutions are paying particular attention to how the new facility could affect the operation of the existing Iron Gates I and Iron Gates II hydropower plants, which have been jointly managed by Serbia and Romania for decades. Any impact on these strategically important assets is considered a key factor in the ongoing assessment.
Several major international companies have shown interest in the project over the years, including Bechtel, which participated in preparatory technical studies and early development activities. As regional electricity systems increasingly require large-scale energy storage solutions to integrate growing renewable capacity, Đerdap 3 is being viewed as a potentially transformative infrastructure project.
However, due to its technical complexity, environmental sensitivity, and cross-border coordination requirements, the final decision-making process is expected to remain lengthy and highly detailed.
