Documentary produced by the Propaganda Office of “Costruzione Meccaniche Riva S.p.a.” in collaboration with the Cinema Section of “Edisonvolta S.p.a.”. It illustrates in detail the construction of a Pelton wheel: from the design phase to construction and transport to its final destination. Every technical and logistical problem was solved thanks to the professionalism and joint efforts of technicians and workers, who together conceived, designed, and implemented the project.