http://www.usbr.gov/power/edu/history.html http://www.usbr.gov/power/edu/history.html new hydropower http://www.usbr.gov/power/edu/history.html http://www.usbr.gov/power/edu/history.html The History of Hydropower Development in the United States From 1940 through 1945 http://www.usbr.gov/power/edu/history.html http://www.usbr.gov/power/edu/history.html http://www.usbr.gov/power/edu/history.html http://www.usbr.gov/power/edu/history.html