Hydropower is a key contributor to the US renewable energy portfolio due to the diverse benefits it provides to the electric power system. Ensuring the sustainable operation of existing hydropower facilities is of great importance to the US renewable energy portfolio and the reliability of the electricity grid. As directed by Congress in Section 9505 of the SECURE Water Act (SWA) of 2009 (Public Law 111-11), the US Department of Energy (DOE), in consultation with the federal Power Marketing Administrations (PMAs) and other federal agencies, has conducted two 5-year assessments examining the potential effects of climate change on water available for hydropower at federal facilities and on the marketing of power from these federal facilities. The Oak Ridge National Laboratory's Technical Memoranda - also known as the "9505 Technical Assessment(s)" - describe the technical basis for the DOE Reports to Congress "Effects of Climate Change on Federal Hydropower" that are called for in the SWA.
An overview of each 9505 Technical Assessment, and access to the Assessments and associated reports, can be found in the links to the right.