Built at the foot of one of the longest and deepest valleys in the Blue Ridge Mountains, Lake Rabun began filling in May of 1915 to form a reservoir of over ten million gallons covering 834 acres with a normal water level of 1690 feet above mean sea level. It was the first of six power producing lakes developed by the Georgia Railway and Power Company on the Tallulah and Tugalo rivers. As a Georgia Power Company facility, it now serves as a power source and a water supply for local communities, while providing recreational activities for all interested.