Hydropower Developments is a collection of papers curated from the November, 2000 conference hosted by the Institution of Mechanical Engineers. Showcasing the latest advances from international companies, these papers highlight specific cases that illustrate current challenges and solutions in the field. Details on the refurbishment of Rannoch Power Station in Scotland and the new hydroelectric unit at Kenya's Gitaru Underground Power Station provide up-to-date guidance on design considerations and technological improvements, shedding new light on ongoing work and suggesting directions for future research.