Watch VoirFilms. Throughout the 1950s and into the 1960s the communities of Cannonsville, Granton, Rock Rift, Rock Royal, Johnny Brook and Beerston, NY were destroyed to make way for the Cannonsville Reservoir. The reservoir would serve as the last piece of New York City’s growing water infrastructure in a battle of upstate versus downstate. 60 years after vacating or moving their homes, former residents gather at their annual town reunion to reflect and reminisce on their memories and the collective trauma that they share.