Dam & Hydropower Enginners

Italian firm providing civil, hydraulic, geotechnical, electrical and many other engineering services

Fifty years of innovative engineering

Studio Pietrangeli was founded in 1964 by Giorgio Pietrangeli to provide specialised engineering services for large dams and hydropower plants.


The firm’s services cover all phases of a project and range from conception to monitoring during operation, including all the design activities, specialised studies, investigations, supervision of the works, and so on.
Although our core activities concentrate on dams and hydropower plants, we are also specialised in large civil structures (tunnels, roads, etc.) and large hydraulic works (water supply systems, irrigation plants, etc).


Studio Pietrangeli’s staff of approximately 80 people includes internationally renowned experts, engineers and other professionals and technical staff specialised in the various project sectors.
While Studio Pietrangeli’s head office is in Rome (Italy), the firm also has branches in Sierra Leone, Ecuador, Tanzania and Ethiopia and elsewhere sets up its own temporary premises and/or makes use of local partners’ facilities.


Our extraordinary international experience confirms the quality of our work. Studio Pietrangeli has successfully completed the design of over 200 dams, 30'000 MW of hydropower plants, 250 km of hydraulic tunnels plus several irrigation, water supply and sewage treatment plants. Alongside its more traditional engineering schemes, Studio Pietrangeli has always proposed innovative solutions to complex technical problems.



The firm is responsible for the engineering of several important international works recently completed or under construction. Those recently completed include Beles 460 MW, Gibe II 420 MW, Bumbuna 50 MW and Gibe III 1'870 MW.

The two SP record-breaking projects are Gibe III (world's highest RCC dam, 250 m) and Grand Ethiopian Renaissance dam (6'000 MW).

Several Studio Pietrangeli projects, given their innovative solutions and importance, have been written about and/or cited in prestigious magazines such as National Geographic, International Water Power and The Economist, used to illustrate banknotes (Sierra Leone), rechargeable phone card and bound issues (Ethiopia).

Fast Track

Nowadays, many of the firm's projects are conceived in only a few weeks through the adoption of so-called “fast track” techniques using satellite imagery, helicopter surveys, drones, surface geotechnical investigations, with the result that several of our largest hydropower projects have been implemented in only four years from conception to operation.

Working conditions

Studio Pietrangeli's specialists are used to working in all types of conditions, from roughing it in field camps in African forests to attending official meetings with the highest echelons of government, industry and finance. The passion for our work never changes.


Our engineers are accustomed to presenting our projects to clients of all types. We have even created simple effective presentations using cartoons and laymen's terms.
SP has recently attended as lecturer to:
- Hydropower & Dams conferences all over the world
- Workshop at Utech of Kingston, Jamaica
- Master at University of Rome, Italy