Candlewood Lake - Hydroelectric Dam

Hydroelectric Dam

Candlewood Lake was formed behind a hydroelectric dam south of the Rocky River's junction with the Housatonic River. Similar to a giant battery, its main purpose is to store water during periods of low electrical demand for power generation when demand is high. Excess electricity from the valley's hydro-system is used to pump water up a hillside into the lake from the nearby Housatonic River during spring, and overnight hours in summer. The water is then allowed to flow back down into the river when extra electricity is needed in the grid, often during the region's mid-to-late summer heat waves. Power is generated by turbines that are spun by the water flowing into the river while pumping is done by reversing the impellers.

Candlewood Lake was created in the 1920s. Inhabitants were relocated, but many of the buildings were left standing and some farming equipment was left behind. The roads were not torn up before the valley was flooded. Scuba divers can investigate buildings from that era, following the roads underwater, and discover artifacts from that era. Some of the notable underwater finds are model Ts, plane wreckage from small craft that have hit the lake since then, and covered bridges from that era.