The dam at Hancock Brook lake is located 3.4 miles upstream of the confluence of Hancock Brook and Naugatuck River. The dam was completed in 1966 at a cost of $3,770,000. The dam is a part of a network of seven flood control reservoirs built by the Corps of Engineers in the Naugatuck River Basin.

The Reservoir Regulation Team (RRT), in Concord, Massachusetts directs the water regulation activities for the New England flood control reservoirs such as Hancock Brook Lake. By way of radio and satellite communications, RRT constantly monitors river levels and weather conditions that influence flood control decisions.

The dam was constructed so it could prevent costly damages if a recurrence of the flood of 1955 was to happen. The highest pool level recorded since the completion of Hancock Brook Dam was in June 1982. The water level raised to 23.4 ft at the dam, utilizing 58% of the storage capacity.

Connecticut USGS Water Resource Division.

Connecticut USGS data.

Click here for current water levels at Hancock Brook Lake..