Have a question?We have the answer. This page of Hydro Industry FAQs offers a wealth of information about the industry to the online hydropower community, including definitions, resources, professional and business development and more. Have a question you don’t see answered here? Ask us at [email protected]. Hydropower 101Hydropower ResourcesProfessional Development and EducationHydro History I need to earn professional development hours to maintain my P.E. (professional engineer) license. Do you know of ways I can earn hours? Attendees at many events organized by Clarion Energy can earn Professional Development Hours (PDHs). These events include HYDROVISION International (www.hydroevent.com).