The Kohanza Reservoir was a reservoir in Danbury,

Connecticut Connecticut ( ) is a U.S. state, state in the New England region of the Northeastern United States. It borders Rhode Island to the east, Massachusetts to the north, New York (state), New York to the west, and Long Island Sound to the south. ...

. Construction was completed in 1866. It was the first of many

reservoir A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of wa ...

s built to supply Danbury's hat factories. The dam broke on January 31, 1869. The ensuing

flood A flood is an overflow of water (list of non-water floods, or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are of significant con ...

of ice and water killed 11 people in half an hour, and caused major damage to many homes and farms, as well as uprooting trees and moving boulders.(3 February 1869)
The Danbury Disaster
'' The New York Herald'', p. 4., col. 1 The reservoir still exists in two smaller sections: Upper Kohanza Lake () and Lower Kohanza Lake ().

References

Reservoirs in Connecticut Geography of Danbury, Connecticut Lakes of Fairfield County, Connecticut {{Connecticut-geo-stub