Saville Dam is an earthen embankment dam with masonry work on the eastern branch of the Farmington River 4 kilometres (2.5 mi) southwest of Barkhamsted, Connecticut. The dam is 135 ft. (41 m) tall and 1,950 ft. (590 m) long and has an uncontrolled spillway on its western portion. It creates the Barkhamsted Reservoir which has a volume of 36.8 billion US gallons (139,000,000 m3) and is the primary water source for Hartford, Connecticut. Wikiedia