U.S. Energy Information Administration, EIA-860, and the Oak Ridge National Laboratory (ORNL) Note: Capacity values prior to 1989 are estimates. Existing capacity includes conventional hydroelectric and pumped storage. New stream-reach developments are stream segments without an existing dam. Expansions add power to existing dams. Some expansions are included in the Annual Energy Outlook 2014 projections. A recent study conducted by Oak Ridge National Laboratory (ORNL) for the U.S. Department of Energy, the New Stream-reach Development Resource Assessment , finds that 61 gigawatts (GW) of hydroelectric power potential exists at waterways without existing dams or diversion facilities. This value excludes Alaska, Hawaii, and federally protected lands. ORNL’s hydropower resource estimates contrast with the 2 GW of additional hydropower capacity projected to be added through 2040 in EIA’s latest Annual Energy Outlook (AEO2014) Reference case. The difference in the […]