NREL - National Renewable Energy Lab - interactive Pumped storage hydropower visualizer:
https://maps.nrel.gov/psh
"Provides an effective way to view the national closed-loop Pumped Storage Hydropower (PSH) resource assessment and identify potential PSH sites while considering a wide array of possible technical and environmental specifications."
"Provides an effective way to view the national closed-loop Pumped Storage Hydropower (PSH) resource assessment and identify potential PSH sites while considering a wide array of possible technical and environmental specifications."