The XX Technical Dam Control International Conference is organized every two years. The 20th jubilee edition of the conference will be held in a hybrid formula to allow you to celebrate the conference anniversary with us in person and online via a streaming platform. The conference theme, "Safety of hydraulic structures", is timely due to numerous problems and new threats to the safe operation of hydraulic structures and their impact on the safety of people and the environment. The conference will provide an excellent opportunity to discuss problems of existing dams and new challenges arising from the perspective of new dam projects supporting safer energy transition among owners and experts dealing with designing, construction, operation, and maintenance of hydraulic structures.